Do not open a file distributed via Your Address Is Invalid email

Also Known As: Qakbot trojan
Type: Trojan
Damage level: Severe

What is Your address is invalid email virus?

It is common that cybercriminals distribute malware by pretending to be legitimate companies and attaching a malicious file or including a malicious link in their emails. Typically, they claim that the attached file is an important document (e.g., invoice, purchase order) and persuade recipients into opening it.

This email is disguised as a letter from FedEx regarding a wrong delivery address. It has an archive file containing a malicious Microsoft Office document designed to install Qakbot attached to it.

Your address is invalid email virus malware-spreading email spam campaign

Cybercriminals behind this email claim that shipment address is invalid and encourage to enter the correct address in the malicious Excel document that can be extracted from the attached ZIP file. Their main goal is to trick recipients into opening a malicious document designed to install Qakbot - a trojan designed to steal sensitive information.

Qakbot targets login credentials (usernames, email addresses, passwords) used to log into bank accounts. It is known that this trojan records keyboard input (logs keystrokes), collects browsing data, cookies, and sends obtained information to a remote server controlled by cybercriminals.

Usually, data that malware like Qakbot collects is used to steal accounts, identities, make unauthorized/fraudulent purchases, transactions. Since Qakbot can log keystrokes, it could be used to steal various accounts (email, social media, etc.).

It is important to know that one stolen account could lead to a loss of multiple accounts. Although, only when users use the same login credentials for more than one online account.

In conclusion, opening the Excel document extracted from a ZIP file attached to this email can lead to identity theft, loss of access to personal accounts, money, and other serious problems. Therefore, files and links in emails like this one must not be opened.

Threat Summary:
Name Qakbot trojan
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Hoax File attached to the email contains a document that has to be used to enter the correct shipping address
Attachment(s) 7757229737-04212021.zip (its name may vary)
Detection Names (7757229737-04212021.xlsm) AegisLab (Trojan.MSOffice.SAgent.4!c), BitDefender (Trojan.GenericKD.36765619), ESET-NOD32 (Multiple Detections), McAfee (Downloader-FCEI!8CF19B34A344), Microsoft (Trojan:Win32/Phonzy.B!ml), Full List Of Detections (VirusTotal)
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Payload Qakbot
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the 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.
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It is common for email to be used by cybercriminals as a channel to deliver their malware. More examples of malspam campaigns used to distribute malicious software via links or files in emails are "NOTICE OF ACCOUNT CLOSURE FOR AUDIT", "OCEANIC PROJECTS", and "Seojoong Logistics DMCC".

It is important to remember that very often cybercriminals use logos of legitimate companies and (or) names of existing people in their emails to make their emails look more trustworthy. A couple examples of malware that is distributed using email are NanoCore, FormBook, and LokiBot.

How did "Your address is invalid email virus" infect my computer?

This particular email has ZIP file attached to it. This archive file contains a malicious 7757229737-04212021.xlsm file (its name may be different in other emails belonging to the same malspam campaign). It installs malware (Qakbot) if it gets a permission to enable macros commands (editing/content).

Although, if opened with Microsoft Office version that was released prior to the year 2010, this document does not ask to enable macros commands - it installs malware after opening it. It is important to mention that MS Excel files are not the only files that cybercriminals attach to their emails.

It is common that other files like Microsoft Word or PDF documents, archive files like RAR, executable files like EXE, JavaScript files are used to deliver malware too.

How to avoid installation of malware?

Irrelevant emails received from a suspicious, unknown addresses should not be trusted. Especially if they contain some attachment or website link. As a rule, emails of this kind are used to deliver malware. As metioned in one of the previous paragraphs, most of those emails are disguised as letters from legitimate companies.

Software should be downloaded only from official web pages and via direct download links. Files, programs downloaded via Peer-to-Peer networks, third-party downloaders , unofficial pages, etc., or installed via third-party installers can be malicious.

All installed software must be updated or activated properly: it has to be achieved using implemented functions or tools that official software developers provide. Also, it is illegal to activate licensed software with various third-party tools.

And finally, it is important to regularly scan the operating system for threats with a reputable antivirus or anti-spyware suite and remove them once the scan is completed. If you've already opened "Your address is invalid email virus" attachment, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Text presented in the "Your address is invalid email virus" email letter:

Subject: Your shipment address is invalid

Your address is invalid.
Tracking ID: 5707603023
Date: 4.21.21
Email : rsemro@landadvisors.com
Status: Needs customer's verification
Reason: Your delivery address contains a bad value.
It may be caused by different formats that are used in e-shops.
Please, check the attached document, fill in the form and send it back.
FеⅾEⅹ 1995-2021 Copyright, All rights reserved.

Malicious attachment distributed via Your address is invalid malspam campaign:

Malicious attachment distributed through Your address is invalid malspam campaign

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Combo Cleaner Antivirus for Windows.

If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK.

During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup.

Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings".

Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard.

In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button.

In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files.

After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer.

Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills.

If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections.

As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Combo Cleaner Antivirus for Windows.

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About the author:

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. Contact Tomas Meskauskas.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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