How to remove Invoice email virus?

Phishing/Scam

Also Known As: Invoice spam

(updated)

Damage level:

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What is Invoice Email virus?

"Invoice Email Virus" (also known as "Outstanding Invoice Email Virus") is a malspam campaign used to proliferate a high-risk trojan called TrickBot. This campaign shares many similarities with a number of other spam campaigns, such as (for example), eFax, Important Documents IRS, and especially HM Revenue & Customs Outstanding Amount.

The text within these emails might differ, even though the delivered message is essentially identical: the user has supposedly received an invoice (via an MS Word attachment) and must pay. Be aware, however, that the attached file is malicious and designed to download and install TrickBot malware.

Invoice Email virus

Invoice email virus in detail

As mentioned, the email messages state that payments have not been submitted and encourages users to open the MS Word attachment, which contains an invoice. This is a scam. Cyber criminals attempt to trick gullible users into opening a malicious file that infects the system.

The text in "Invoice Email Virus" campaign emails can vary, since cyber criminals register various web domains and email addresses with the names of legitimate companies and government departments. These URLs/email addresses are then used to send spam - it is easier to give the impression of legitimacy when the sender is familiar to the user.

Be aware that TrickBot is high-risk malware. It hijacks web browsers and collects various logins/passwords. Collected data is sent to a remote server controlled by cyber criminals. These people can receive sensitive information (e.g., criminals might gain access to users' social networks, bank accounts, and so on).

The presence of this malware can lead to significant financial loss or even identity theft. Therefore, data tracking might lead to serious privacy issues or even identity theft.

If you have opened emails/attachments that belong to an "Invoice Email Virus" spam campaign, you should immediately scan the system with a reputable anti-virus/anti-spyware suite and remove all detected threats.

Threat Summary:
Name Invoice spam
Threat Type Trojan, Password stealing virus, Banking malware, Spyware
Symptoms Trojans are designed to stealthily infiltrate victim's computer and remain silent thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software cracks.
Damage Stolen banking information, passwords, identity theft, victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.

Download Combo Cleaner

To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by RCS LT, the parent company of PCRisk.com.

Simimlarities with other Trojans

TrickBot is virtually identical to dozens of other trojan-type viruses, such as Pony, Adwind, FormBook, and many others. As with TrickBot, these viruses are also distributed using spam campaigns. In addition, their behavior is also very similar - all collect data.

Some trojans are also designed to distribute other viruses (typically, ransomware). Therefore, these viruses pose a direct threat to your privacy and Internet browsing safety.

How did Invoice Email virus infect my computer?

"Invoice Email virus" comes together with malicious MS Word attachments presented as invoices. After opening these files, users are asked to enable macro commands, otherwise the content will not be displayed properly. In doing so, however, users grant permission for the attachments to run scripts that stealthily download/install malware.

Note that this will only work if the attachment is opened using the MS Word program. If the file is opened using other software capable of reading these formats, the scripts will not be executed. Furthermore, the malware only targets the Windows Operating System and, thus, users who run other platforms are safe.

How to avoid installation of malware?

The main reasons for computer infections are poor knowledge and careless behavior. Therefore, pay close attention when browsing the Internet. Think twice before opening email attachments. If the file seems irrelevant or has been received from a suspicious/unrecognizable email, it should never be opened - these emails should be deleted without reading.

Furthermore, some trojans are distributed using the "bundling" method (stealth installation of rogue apps together with regular software), and fake updaters. Therefore, be cautious when downloading/installing/updating software. Carefully analyze each window of the download/installation dialogs and opt-out of all additionally-included programs.

Your programs should be downloaded from official sources only, using direct download links. In addition, keep installed applications up-to-date. To achieve this, use implemented features or tools provided by the official developer only. We also strongly recommend that you have a legitimate anti-virus/anti-spyware suite installed and running.

More recent versions (2010 and above) of MS Office open newly-downloaded files in "Protected Mode", thereby preventing malicious attachments from downloading/installing malware. Therefore, you are strongly advised to avoid using old versions. The key to computer safety is caution.

If you have already opened the malicious attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Examples of messages presented in different variants of this malicious email messages:

Subject: RE: Outstanding INVOICE BIA/066250/5423
The invoices came to us very late. Both are enclosed in attachement.
hxxp://www.perezdearceycia.cl/
alexa.ballantine@gmail.com

 

------------------------------------------------------


Subject: INCORRECT INVOICE
We are waiting for the confirmation from your side so that we can send you the Invoice & Credit card link to process the payment and start the services. If you have any queries, please feel free to contact us. We hope for a positive reply.
hxxp://cqfsbj.cn/
This message is confidential and/or contains legally privileged information. It is intended for the addressees only.
Jamacapq@sbcglobal.net

 

------------------------------------------------------

 

Subject: Outstanding INVOICE XOJR/7763411/6403
We have not received payment or an update on when the overdue invoices will be paid. Our payment terms are strictly 30 days. Please let me know when these invoices will be paid. Please see below the list of overdue invoices:
hxxp://minami.com.tw/
Regards
Priyanka Kapadia

 

------------------------------------------------------


Subject: Outstanding INVOICE FQOVN/2773110/730
Please see below the list of overdue invoices, of which 223.00 euro is due since last month. Can you please advise when payment will be made.
hxxp://www.legionofboomfireworks.com/
This message is confidential and/or contains legally privileged information. It is intended for the addressees only.
Thanks
Kira Holden

 

------------------------------------------------------


Subject: Invoice Number 55057
Last one year we started to charge for CRB check. They pay us first and we apply for CRB. =0DI do not have invoices.
hxxp://www.caglarturizm.com.tr/
Kind Regards,
andy

 

------------------------------------------------------

Subject: Final Account
Please find attached your confirmation documents. What you need to do Urgently Print off, sign and scan/send back the full proposal form within 7 days
hxxp://www.jxprint.ru/
Many Thanks
CYNTHIA HARRY

Malicious attachment distributed via "Invoice Email SPAM" campaign:

Malicious attachment distributed through Invoice Email SPAM spam campaign

Example of yet another invoice-themed spam email delivered in Portuguese language:

Invoice-themed spam email (2020-09-16)

Text presented within:

Subject: Estimado Cliente Pingo Doce - Segue em anexo a sua Fatura Eletronica. - ( 685809856280  )

Prezado (a) atendimento@pcrisk.pt ,

Segue em anexo a sua Fatura Eletronica.

Anexo: NFe-311502664715151006891154.PDF

Envio automatico, Favor nao Responder
Atenciosamente,
DPC Pingo Doce
Lisboa, Portugal 21 380 8520
    
Este email foi escaneado pelo Avast antivirus.
www.avast.com

16/09/2020 09:41:16

Another invoice-themed spam email used to spread a malicious MS Excel document:

Invoice-themed spam email used to distribute a malicious MS Excel document (2020-11-03)

Text presented within:

Subject: Invoice 523389

 

Invoice Due:11/02/2020
523389    Amount Due: $1,860.00

Dear Customer:

Your PAST DUE invoice is attached. Please remit payment at your earliest convenience

Thank you for your business - we appreciate it very much.

Sincerely,
Accounts Payable

Screenshot of the attached malicious MS Excel document:

Malicious MS Excel document distributed via invoice-themed spam emails

Example of yet another invoice-themed spam email used to spread a malicious MS Excel document which injects Dridex malware into the system:

Invoice-themed spam email used to spread a malicious MS Excel document which injects Dridex malware into the system

Text presented within:

Subject: Electronic Invoice (#00332731)

 

Per your request, here is the invoice you have asked to be sent via email. If you have any questions, please feel free to call us at 800-485-1863

Screenshot of the attached MS Excel document:

Malicious MS Excel doc used to spread Dridex malware

Yet another invoice-themed spam email used to spread a malicious .IMG file (the links within lead to the download of said file):

Invoice-themed spam email spreading a malicious .IMG file (2020-11-10)

Text presented within:

Subject: INV-209734564

Good Day
 
Please see attached Invoice.
 
For any other concern, please inform me.
 
Thanks.
Best Regards,
 
Ellen Maralit
Procurement Specialist
Sodexo On-Site Services, Inc.
Tel:  (2) 499-4356
Mobile:  9167781908
 
pdf.gif  Invoice .pdf
194K View as HTML  Scan and download
 
Disclaimer and Confidentiality
This e-mail, attachments included, is confidential. It is intended solely for the addressees. If you are not an intended recipient, any use, copy or diffusion, even partial of this message is prohibited. Please delete it and notify the sender immediately. Since the integrity of this message cannot be guaranteed on the Internet, SODEXO cannot therefore be considered liable for its content.Ce message, pieces jointes incluses, est confidentiel. Il est etabli a l'attention exclusive de ses destinataires. Si vous n'etes pas un destinataire, toute utilisation, copie ou diffusion, meme partielle de ce message est interdite. Merci de le detruire et d'en avertir immediatement l'expediteur. L'integrite de ce message ne pouvant etre garantie sur Internet, SODEXO ne peut etre tenu responsable de son contenu.
Please consider the environment before printing this message.


Avast logo       
This email has been checked for viruses by Avast antivirus software.
www.avast.com

Yet another invoice-themed spam email used to spread a malicious MS Excel document which injects Dridex malware into the system:

Invoice-themed spam email spreading Dridex malware

Text presented within:

Subject: Invoice 093090

 

Invoice
Due:12/2/2020
093090
Amount Due: $1,940.00
Dear Customer:

Your invoice-093090 for $1,940.00 is attached.
We accept cash, check or ACH transfer per this invoice with INTUIT.
If you wish to pay by credit card, please contact our office.
A processing fee of 3.5% will be added to this invoice amount. Please remit payment at your earliest convenience.

Thank you for your business - we appreciate it very much.

Sincerely,

HEAD Office
919-36-0288

Screenshot of the attached MS Excel document:

Malicious MS Excel document used to inject Dridex malware into the system

Yet another variant of invoice-themed spam email:

Invoice-themed spam email (2021-01-13)

Text presented within:

Subject: Invoice 9170

Invoice Due:01/12/2021
9170
Amount Due: $1,440.00
Dear Customer:

Your invoice is attached. Please remit payment at your earliest convenience.

There is a 3% credit/debit card processing fee for all transactions.
If wanting to pay by credit/debit card, please respond to this email or call our office and we will forward a link for on-line processing.

Thank you for your business - we appreciate it very much.

808-245-4405
View & Pay Invoice

A Spanish variant of invoice-themed spam email promoting a phishing website:

Spanish variant of invoice-themed spam email

Text presented within:

Subject: Factura

 

Estimado cliente,

Buen dí­a
Se adjunta una factura. N -

Descargar Factura
Gracias por su preferencia.
Saludos cordiales.

Yet another example of invoice-themed spam email used to spread malware:

Invoice-themed spam email promoting malware (2021-06-30)

Text presented within:

Subject: Reminder about Unpaid invoice LL015445

 

Good day,

Please find attached invoice LL015445.

According to our data, the above mentioned invoice is still unpaid.

Please let us know when the payment will be done.  


AMITH BALRAM

ON BEHALF OF,


Announcement :  This is to inform all our customers and partners that COVID-19 global pandemic situation has created severe disruptions in Airlines and Shipping Lines schedules, services and availability of space for timely loading. Please note that these disruptions can cause delay / cancellation of our planned schedule of shipment leading to additional cost being incurred on the shipment being charged by Airlines / Shipping Lines on case to case basis. Therefore, all our quotations shall be subject to variance due to these factors. We request your understanding and co-operation.

Thanks & Regards,

Jovita Vas

Inside Sales-Importsales

jovita.vas@glweststardubai.com
+971 4 3974400
+971 43974666
+971 4 6098530

www.glweststardubai.com

11th Floor, Fahidi Heights, Khalid Bin Al Waleed Street, Bur Dubai, PO. BOx 6027, Dubai, United Arab Emirates

All our business activities and business transactions are undertaken in accordance with the NAFL Standard Trading Conditions. The duties, responsibilities and liabilities of the company are subject to the provisions of the NAFL Standard Trading Conditions. A copy of NAFL Standard Trading Conditions can be furnished upon request.

This message contains confidential and/or privileged information. If you are not the intended addressee or authorized to receive this for the intended addressee, you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation.

Yet another example of invoice-themed spam email promoting a phishing site:

Invoice-themed spam email promoting a phishing website (2021-07-23)

Text presented within:

Subject: File "******** /Overdue Invoices- MARCH-JUNE21.pdf" has been shared with you on 7/22/2021 5:35:18 a.m.

 

A file has been shared with ********

forlogs.icu Q2 Overdue Invoices - JUNE21.pdf
******** Q2 Overdue Invoices - JUNE21.pdf
This link will work only for boss1
Open
Privacy Statement

Screenshot of the promoted phishing site:

Phishing website promoted via invoice-themed spam email (2021-07-23)

Yet another example of an invoice-themed spam email spreading a malicious MS PowerPoint document:

Invoice-themed spam email (2021-09-21)

Text presented within:

Subject: Re: Review Kindly

 

Good Day.
 
Please confirm the invoice of the ordered products before we initiate the transfer as attached.

Also, we request you to send us your best price for the items on the attached file with data sheets.
 
Please indicate the below information as well.
1. Delivery Period
2. Warranty
3. Payment Terms

Awaiting your immediate response in this regard.

Yours sincerely,

Mark Henry

Petro-Canada Lubricants Inc.
2310 Lakeshore Road West
Mississauga, Ontario, L5J 1K2
Canada.

Yet another example of invoice-themed spam email spreading a malicious MS Excel document:

Invoice-themed spam email (2021-10-14)

Text presented within:

Subject: Invoice/Sales Receipt


Your sales receipt is attached. Your credit card on file has been charged.

Thank you for your business - we appreciate it very much.

Sincerely,


-------------------------   Sales Receipt Summary  ---------------------------
Receipt # : 4479
Receipt Date: 10/13/2021
Total: $3,442.00

The complete version has been provided as an attachment to this email.
----------------------------------------------------------------------

Screenshot of the distributed malicious MS Excel document:

Malicious MS Excel document distributed via invoice-themed spam email (2021-10-14)

Another example of invoice-themed spam email spreading FormBook malware:

Invoice-themed spam email spreading Formbook (2022-10-25)

Text presented within:

Subject: Requested Invoice

 

Hello,

Herewith your asking invoice as attached below.

Best Regards

Emm Woo

Kang Chyau Industry Co., Ltd.

FEEL OUR PASSION

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Types of malicious emails:

If you opened an attachment or downloaded a file from a suspicious email, run a full system scan with Combo Cleaner. If you only received the email and didn't engage with it, you don't need to scan anything - just identify the scam and delete it. The full procedure below covers both situations and what to do if you already clicked, replied, or sent money.

Credential theft Phishing emails

Fake login pages disguised as PayPal, Microsoft, Apple, banks, or social networks. The email pushes a link to a near-perfect copy of the real login screen. The moment you type your username and password, the attacker has them.

Common subject lines

  • "Action required: confirm your account"
  • "Your password expires today"
  • "Unusual sign-in attempt detected"
  • "Verify your billing information"
Example phishing email impersonating a major brand
Malware delivery Emails with malicious attachments

Trojans hidden inside fake invoices, faxes, shipping confirmations, or Office documents. Opening the attachment runs the payload and infects the system - often with an info-stealer or remote-access trojan.

Common subject lines

  • "Invoice INV-2026-XXXX attached"
  • "Fax received - 3 pages"
  • "Your shipping document is ready"
  • "Voicemail from +1-XXX-XXX-XXXX"
Example email with a fake invoice attachment
Extortion Sextortion emails

Fake claims of webcam recordings demanding cryptocurrency. Almost always a bluff: the attacker pulls a real password from an old data breach to make the threat look credible, then claims to have video of you. They have no recording and no access.

Common subject lines

  • "I know your password is XXXX"
  • "Your account has been hacked"
  • "I have recorded you - 48 hours to pay"
  • "You have been compromised"
Example sextortion email demanding bitcoin payment
Callback fraud Refund & callback scams

"Your subscription was renewed for $499 - call to cancel." Norton, McAfee, Geek Squad, PayPal, and Wells Fargo variants are all common. There's no real subscription. The phone number in the email connects directly to the scammer, who walks you through "refunding" yourself - which is actually them stealing money from your bank.

Common subject lines

  • "Norton subscription auto-renewed - $499.99"
  • "McAfee Total Protection invoice"
  • "Geek Squad order confirmation"
  • "Your PayPal payment is being processed"
Example fake Norton or McAfee subscription renewal email
Credential theft Account suspension & verification scams

"Your account will be deleted in 24 hours - verify now." The artificial deadline is the whole point: it pressures you to click before checking details. The "verify" link goes to a phishing page styled to look like the real provider.

Common subject lines

  • "Your account will be deleted in 24 hours"
  • "Suspicious activity detected - verify now"
  • "Final warning: account closure"
  • "Action required to keep your account active"
Example fake account suspension email
Mixed payload Delivery & package scams

Fake DHL, USPS, UPS, or FedEx tracking, customs fees, or "package undeliverable" notices. Targets anyone expecting a parcel - the timing alone catches many people. The link hides either phishing (asking for card details to "release" the package) or a malware download.

Common subject lines

  • "Your DHL package is held at customs"
  • "USPS - delivery attempt failed"
  • "FedEx tracking update - action required"
  • "Pay $2.99 redelivery fee to release your parcel"
Example fake DHL/USPS/FedEx delivery notification
Remote access Tech support scams

Fake Microsoft, Apple, or "Windows Defender" security alerts pushing a phone number. Real Microsoft and Apple never email a phone number to call. The number connects you to a scammer who asks for remote access to "fix" the imaginary problem and then demands payment.

Common subject lines

  • "Microsoft Defender expired - renew now"
  • "Apple ID security alert"
  • "Critical: virus detected on your PC"
  • "Windows license expired - call now"
Example fake Microsoft or Apple tech support alert email
Wire fraud Advance-fee scams

Inheritance, lottery wins, romance, or business deals that ask for a small fee to release a much larger sum. The classic "Nigerian prince" 419 family of frauds. Once you pay the first fee, more fees appear (taxes, lawyer, transfer charges) until you stop paying. The promised money never exists.

Common subject lines

  • "Inheritance from a relative you didn't know about"
  • "You won the international lottery"
  • "URGENT - business proposal worth $XX million"
  • "Compensation fund release for fraud victims"
Example advance-fee or 419 scam email
Wire fraud Business email compromise (BEC)

CEO impersonation asking employees to wire money or buy gift cards, or fake supplier invoices with newly "updated" bank details for payment redirection. The email often spoofs a real internal executive's display name and uses an external lookalike domain.

Common subject lines

  • "Quick task - need you to buy gift cards"
  • "Updated banking details for invoice payment"
  • "Wire transfer request - urgent"
  • "Are you available?" (CEO impersonation opener)
Example business email compromise wire-transfer request

How to spot a malicious email?

Phase 1~ 2 min
Spot - identify the red flags

1

Check the sender's actual address, not the display name

30 sec

The display name (the human-readable part) is trivial to fake. Always check the full address that comes after it. Common red flags:

  • Domain mismatch - service@paypa1.com, support@micros0ft-help.com, look-alike domains using digits or extra hyphens
  • Free-email impersonation - any "official" message from a bank, courier, or platform sent from a @gmail.com, @outlook.com, or @yahoo.com address
  • Reply-To mismatch - the From address looks legitimate but Reply-To points somewhere completely different
Why this matters

Real companies own their domains and send mail from them. A "DHL" message from a Gmail address is never legitimate, regardless of how convincing the body looks.

2

Watch for urgency, threats, and generic greetings

30 sec

Scams almost always rush you. The point is to make you act before you think. Treat any of the following as a strong signal:

  • "Your account will be deleted in 24 hours"
  • "Final notice" / "Immediate action required"
  • "Dear Customer" or "Dear User" instead of your real name
  • Threats of fines, account closure, legal action, or arrest
  • Promises of refunds, prizes, or money you didn't earn
  • Spelling and grammar mistakes in messages claiming to come from a major brand
3

Hover over every link before clicking

30 sec

On a desktop, hover the mouse over the link without clicking. The real destination shows in the bottom-left status bar of your browser or email client. On a phone, long-press the link to preview the URL.

  • Real Microsoft, PayPal, or bank links go to those exact domains, not redirects through unrelated sites
  • Shortened URLs (bit.ly, tinyurl, t.co) hide the real destination - never click them in unsolicited mail
  • The visible link text and the actual URL must match - mismatches are the single biggest phishing red flag
Pro tip

When in doubt, don't click the link. Open a new browser tab and type the company's address yourself, then log in normally. If there really is an issue with your account, you'll see it there.

4

Treat unexpected attachments as hostile

30 sec

If you didn't ask for the file, don't open it - even if it appears to come from someone you know. Categories that should never be opened from email without verification through another channel:

  • .exe, .scr, .iso, .img, .vbs, .bat - executables, never legitimate attachments
  • .docx, .xlsx, .pptx with "Enable macros" prompts - the macros run the malware
  • .pdf with "Click here to view" buttons - usually a phishing redirect, not a real document
  • .zip, .rar, .7z archives, especially password-protected ones - the password defeats the email scanner
Phase 2~ 2 min
Report and delete - if you haven't engaged

If you only received the email and didn't reply, click, or open anything, the steps below are all you need. Your computer is not infected.

5

Don't reply, don't click "unsubscribe"

30 sec

Replying confirms your address is real and monitored, which gets you added to higher-value scam lists. The "unsubscribe" link in a scam message is rarely a real opt-out - it usually leads to a phishing page or downloads a tracking pixel.

Instead, mark the message as junk or phishing inside your email client (this trains the spam filter), then block the sender.

6

Report the scam to your email provider and authorities

1 min

Inside your email client:

  • Gmail: open the message → ⋮ menu → Report phishing
  • Outlook / Outlook.com: ⋯ menu → ReportReport phishing
  • Apple Mail / iCloud: Move to Junk, then forward to reportphishing@apple.com

Forward or report to authorities:

  • International: forward to reportphishing@apwg.org
  • United States: ic3.gov (FBI)
  • United Kingdom: forward phishing emails to report@phishing.gov.uk (NCSC SERS); for financial loss report at reportfraud.police.uk (Report Fraud, the successor to Action Fraud; 0300 123 2040)
  • Canada: antifraudcentre.ca
  • Australia: scamwatch.gov.au
  • EU: your national CERT - find yours via the ENISA CSIRT map

After reporting, delete the email and empty the Trash folder so you don't accidentally open it later.

Phase 3~ 10–60 min
Recover - if you already engaged with the scam

Pick the step below that matches what you did. If multiple apply, work through them in the order they appear - the steps are arranged from lowest to highest risk.

7

You only clicked a link (didn't enter anything or download anything)

Scenario: clicked link only10 min

Close the page right away. Don't enter any information, even if the page looks legitimate.

  • Clear your browser cache and cookies for the last hour - Chrome/Edge: Ctrl+Shift+DelLast hour → check Cookies and Cached files
  • Run a quick scan with Combo Cleaner in case the page tried to drop a file silently (drive-by download)
  • Update your browser to the latest version - most drive-by exploits target outdated browsers
  • Watch for new browser pop-ups, redirects, or unfamiliar notifications over the next few days
Why this matters

Modern browsers block most drive-by attacks, but a single click on a phishing page can still be enough on an outdated browser or unpatched plugin. A quick scan catches anything that landed silently.

8

You opened an attachment or downloaded a file - run a full malware scan

Scenario: opened attachment⚠ Highest risk60–90 min

Opening an attachment is the most common path to actual infection. Treat the system as compromised until the scans below come back clean. Work through these sub-steps in order:

8.1Disconnect from the network

Unplug Ethernet and turn off Wi-Fi. If the attachment was an info-stealer or remote-access trojan, this stops it from sending data out or receiving commands. Keep the network off until you've booted into Safe Mode (next step) - you'll reconnect there briefly to download the scanners.

8.2Boot into Safe Mode with Networking, then download the scanners

Windows 11: Settings → System → Recovery → Advanced startup → Restart now → Troubleshoot → Advanced options → Startup Settings → Restart → press 5 or F5.

Windows 10: hold Shift, click Power → Restart → Troubleshoot → Advanced options → Startup Settings → Restart → press F5.

Once Safe Mode has loaded, turn Wi-Fi back on and download Combo Cleaner (used in 8.4) and Microsoft Safety Scanner (used in 8.5). Safe Mode loads only minimal drivers, so most malware can't auto-run while you're getting the tools. Save both installers to your Desktop.

8.3Run Microsoft Defender Offline

Reboot to normal Windows. Open Windows Security → Virus & threat protection → Scan options. Select Microsoft Defender Antivirus (offline scan) and click Scan now. The PC restarts into a stripped-down environment and scans the disk before Windows fully loads - this is what catches rootkits and bootkits.

Recommended antivirus
Combo Cleaner

VB100 certified. Includes anti-trojan, registry/persistence scanning, and anti-spyware in one pass. The 7-day free trial is available.

Download Combo Cleaner
8.4Run a full Combo Cleaner scan

Install Combo Cleaner and run a full system scan (not the quick scan). Let it complete fully, review what it found, and apply the recommended actions. Combo Cleaner will quarantine known trojans and remove their persistence in the registry.

8.5Run Microsoft Safety Scanner as a second-opinion scan

Download Microsoft Safety Scanner (MSERT.exe). The binary expires every 10 days, which means every download has the latest signatures. Run a full scan after Combo Cleaner to catch anything one engine alone might miss.

8.6Reset browsers and clear notification permissions

Many email-borne trojans drop adware that hijacks browsers. Reset each browser you use:

Chrome: chrome://settings/resetRestore settings to their original defaults. Then chrome://settings/content/notifications - remove unfamiliar sites.

Edge: edge://settings/reset. Then edge://settings/content/notifications.

Firefox: about:supportRefresh Firefox.

8.7Re-enable Defender, Tamper Protection, and update everything

Open Windows Security → Virus & threat protection → Manage settings and confirm Real-time protection, Cloud-delivered protection, and Tamper Protection are all on. Then run Settings → Windows Update → Check for updates and update browsers and applications.

Important

If the scans keep finding new threats on each run, or files reappear after deletion, you may have a deeper compromise that needs a clean Windows reinstall. See pcrisk's full manual malware removal guide for the extended procedure (Process Explorer, Autoruns, hosts file inspection).

9

You entered credentials on a fake login page

Scenario: shared password⚠ Act fast20 min

Assume the attacker has your password and is using it right now. Speed matters.

  1. Change the password from a different, known-clean device (your phone is fine if it's not infected). Don't reuse the old password anywhere else.
  2. Enable two-factor authentication if you haven't already. Prefer an authenticator app or hardware key over SMS.
  3. Sign out of all sessions - most platforms have a "sign out everywhere" option in security settings, which kicks the attacker out.
  4. Review recent activity - look for unfamiliar logins, new devices, forwarding rules, or app permissions. Remove anything you don't recognize.
  5. Check your other accounts - if you reused that password anywhere else, change it there too. Check your exposure at haveibeenpwned.com.
  6. Update security questions - the attacker may have seen the answers in your account profile.
Why email comes first

If you only have time to change one password, change your primary email password - it's the recovery hub for every other account. An attacker who controls your email can reset everything else.

10

You sent money or shared bank, card, or ID details

Scenario: financial loss⚠ Contact bank now30 min

Time is the single biggest factor in recovering money. Banks can sometimes recall a wire or reverse a card transaction within the first few hours.

  1. Call your bank or card issuer immediately. Use the number on the back of the card, not any number from the scam email. Ask them to freeze the card, reverse the transaction if possible, and flag the account for fraud monitoring.
  2. If you sent a wire transfer or used a money-transfer service (Western Union, MoneyGram, Zelle, Wise), call them directly and request a recall. Some can be reversed within minutes if reported fast.
  3. If you sent cryptocurrency or gift cards, recovery is unlikely - but report it anyway, since law enforcement tracks these patterns.
  4. File a police report. You'll need the report number for any insurance, bank, or credit-bureau claim. Save the report number.
  5. File with the right authority for your country:
  6. Set fraud alerts on all major credit bureaus if you shared any ID details. US: Equifax, Experian, TransUnion. UK: Experian, Equifax, TransUnion (Cifas Protective Registration is a stronger option).
  7. Save all evidence - the original email (with full headers), screenshots of the fake site, transaction records, any phone numbers or chat logs.
Phase 4~ 15 min + 30 days
Verify & monitor

11

Final scan and startup-app check

15 min

Reconnect to the network and run one final full scan with Combo Cleaner, followed by a Windows Defender quick scan. Then open Task Manager (Ctrl + Shift + Esc) and switch to Startup apps - disable anything unfamiliar.

Make sure Windows, browsers, and any applications you use are fully up to date. The infection vector that worked on you once usually involves outdated software.

12

Monitor accounts and credit for 30 days

5 min/day · 30 days

Most fraud follow-ups land in the first month. Until that window closes, keep watching:

  • Bank and card statements - daily for the first week, then weekly
  • Email - watch for password-reset confirmations or login alerts you didn't trigger
  • Credit report - US: free at annualcreditreport.com; UK: Experian, Equifax, TransUnion all have free tiers
  • Breach alerts - sign up at haveibeenpwned.com to be notified when your email appears in new leaks

If anything new appears in any of those, treat it as a continuing compromise: change passwords again, contact the bank again, and update the police report.

Important: If you didn't click anything, didn't reply, and didn't open any attachment, your computer is not infected - just delete the email and move on. If you opened an attachment or downloaded a file, run an automated scan with Combo Cleaner and Windows Defender and stop there. That path catches the vast majority of email-borne malware without the risk of breaking Windows by deleting the wrong file.

Frequently Asked Questions (FAQ)

Why did I receive this email?

It is likely that cybercriminals have obtained your email address from some database of leaked emails. Emails used to deliver malware are not personal.

I have downloaded and opened a file attached to this email, is my computer infected?

The MS Office documents used in this malspam campaign do not infect computers unless they get permission to enable macros commands (editing or content). Although, malicious documents opened with MS Office versions released before 2010 infect computers without asking permission to enable macros commands.

I have read the email but didn't open the attachment, is my computer infected?

Opening a malicious email cannot cause any harm. Computers get infected only when recipients open/execute malicious files (attachments or files downloaded from received websites).

Will Combo Cleaner remove malware infections that were present in email attachment?

Yes, Combo Cleaner is capable of detecting and removing almost all known malicious programs. Certain malware can hide deep in the system. In such cases, the operating system must be scanned fully.

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Tomas Meskauskas

Tomas Meskauskas

Expert security researcher, professional malware analyst

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats.

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