Do not trust fake "Roundcube Found Several Undelivered Messages" emails

What kind of emails are "Roundcube Found Several Undelivered Messages"?

We discovered multiple "Roundcube Found Several Undelivered Messages" spam emails. This mail makes false claims regarding high priority emails failing to reach the recipient's inbox. The purpose is to deceive users into providing their email account log-in credentials to a phishing site.

"Roundcube Found Several Undelivered Messages" email scam overview

The spam emails with the subject "Restore Pending undelivered Messages" (may vary) inform the recipient that multiple emails failed delivery. Six administrative and payment-related messages did not reach the inbox. The letter instructs the recipient to press the "Read Undelivered Email" button to release the withheld emails.

As mentioned in the introduction, all information provided in this letter is false, and this mail is not associated with Roundcube, cPanel, Microsoft Corporation, or any other products, services, providers, and entities.

The "Roundcube Found Several Undelivered Messages" spam campaign endorses a phishing website disguised as an email account sign-in page. Phishing sites record provided information. Hence, by trusting this mail – victims can lose their email accounts and potentially the content registered through them.

To expand upon the potential abuse of this unauthorized access, cyber criminals can steal the identities of account owners (e.g., emails, social networking, messengers, chats, etc.) and ask the contacts/friends/followers for loans or donations, endorse scams, and spread malware by sharing virulent links/files.

Furthermore, sensitive content discovered on compromised data storage or similar platforms could be used for blackmail or other malicious purposes. What is more, hijacked finance-related accounts (e.g., e-commerce, money transferring, digital wallets, online banking, etc.) can be used to make fraudulent transactions and online purchases.

To summarize, victims of scam mail like "Roundcube Found Several Undelivered Messages" can experience system infections, serious privacy issues, financial losses, and even identity theft.

If you have already provided your log-in credentials – immediately change the passwords of all possibly exposed accounts and inform their official support.

Threat Summary:

Name	"Roundcube Found Several Undelivered Messages" phishing email
Threat Type	Phishing, Scam, Social Engineering, Fraud
Fake Claim	Several important emails failed to reach the recipient's inbox.
Disguise	Roundcube, cPanel, Microsoft Corporation
Symptoms	Unauthorized online purchases, changed online account passwords, identity theft, illegal access of the computer.
Distribution methods	Deceptive emails, rogue online pop-up ads, search engine poisoning techniques, misspelled domains.
Damage	Loss of sensitive private information, monetary loss, identity theft.
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 read more.

Phishing spam campaign examples

"Specification Of Products", "New Messages Notification", "DNS Error", and "Request To Cancel Your Services" are just some examples of phishing spam campaigns.

The most commonly targeted information includes log-in credentials, personally identifiable details, and finance-related data. However, spam emails are used to promote various scams and to distribute malware.

This mail can be plain and full of errors or competently crafted and even convincingly disguised as messages from legitimate entities (e.g., service providers, corporations, companies, organizations, authorities, etc.).

How do spam campaigns infect computers?

Spam campaigns proliferate malware by distributing virulent files as attachments or download links. These files come in various formats, e.g., documents (Microsoft Office, Microsoft OneNote, PDF, etc.), archives (ZIP, RAR, etc.), executables (.exe, .run, etc.), JavaScript, and so on.

Once such a file is executed, run, or otherwise opened – the infection chain is initiated. Some formats can require additional user interaction to begin downloading/installing malware. For example, Microsoft Office files require users to enable macro commands (i.e., editing/content), while OneNote documents need them to click on embedded links/files.

How to avoid installation of malware?

Incoming emails, DMs/PMs, SMSes, and other messages must be approached with caution. Do not open attachments or links present in dubious/irrelevant mail, as they can be infectious.

Keep in mind that malware is not proliferated exclusively via spam mail. Therefore, be vigilant while browsing since fake and malicious online content usually appears genuine and harmless.

Furthermore, download only from official and verified sources. Activate and update programs using legitimate functions/tools, as illegal activation ("cracking") tools and third-party updates can contain malware.

It is paramount for device integrity and user safety to have a reputable anti-virus installed and kept updated. Security software must be used to run regular system scans and to remove threats and issues. If you've already opened malicious attachments, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Screenshot of another variant of the "Roundcube Found Several Undelivered Messages" spam email:

Text presented in these "Roundcube Found Several Undelivered Messages" emails:

Subject: Restore Pending undelivered Messages

Roundcube Found Several Undelivered Messages

5/14/2024 3:58:04 p.m.

Undelivered emails for ********
You have up to 6 administrative and payments related Messages hanging. Retreive the emails into your local folder by using the Read Undelivered Emails button

Read Undelivered Email

Gateway ********

Microsoft Corporation
One Microsoft Way, Redmond, WA 98052, USA

Screenshot of the phishing website promoted by this spam campaign:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT 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:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. 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 read more.

Quick menu:

• What is "Roundcube Found Several Undelivered Messages" phishing email?
• Types of malicious emails.
• How to spot a malicious email?
• What to do if you fell for an email scam?

Types of malicious emails:

Phishing Emails

Most commonly, cybercriminals use deceptive emails to trick Internet users into giving away their sensitive private information, for example, login information for various online services, email accounts, or online banking information.

Such attacks are called phishing. In a phishing attack, cybercriminals usually send an email message with some popular service logo (for example, Microsoft, DHL, Amazon, Netflix), create urgency (wrong shipping address, expired password, etc.), and place a link which they hope their potential victims will click on.

After clicking the link presented in such email message, victims are redirected to a fake website that looks identical or extremely similar to the original one. Victims are then asked to enter their password, credit card details, or some other information that gets stolen by cybercriminals.

Emails with Malicious Attachments

Another popular attack vector is email spam with malicious attachments that infect users' computers with malware. Malicious attachments usually carry trojans that are capable of stealing passwords, banking information, and other sensitive information.

In such attacks, cybercriminals' main goal is to trick their potential victims into opening an infected email attachment. To achieve this goal, email messages usually talk about recently received invoices, faxes, or voice messages.

If a potential victim falls for the lure and opens the attachment, their computers get infected, and cybercriminals can collect a lot of sensitive information.

While it's a more complicated method to steal personal information (spam filters and antivirus programs usually detect such attempts), if successful, cybercriminals can get a much wider array of data and can collect information for a long period of time.

Sextortion Emails

This is a type of phishing. In this case, users receive an email claiming that a cybercriminal could access the webcam of the potential victim and has a video recording of one's masturbation.

To get rid of the video, victims are asked to pay a ransom (usually using Bitcoin or another cryptocurrency). Nevertheless, all of these claims are false - users who receive such emails should ignore and delete them.

How to spot a malicious email?

While cyber criminals try to make their lure emails look trustworthy, here are some things that you should look for when trying to spot a phishing email:

• Check the sender's ("from") email address: Hover your mouse over the "from" address and check if it's legitimate. For example, if you received an email from Microsoft, be sure to check if the email address is @microsoft.com and not something suspicious like @m1crosoft.com, @microsfot.com, @account-security-noreply.com, etc.
• Check for generic greetings: If the greeting in the email is "Dear user", "Dear @youremail.com", "Dear valued customer", this should raise suspiciousness. Most commonly, companies call you by your name. Lack of this information could signal a phishing attempt.
• Check the links in the email: Hover your mouse over the link presented in the email, if the link that appears seems suspicious, don't click it. For example, if you received an email from Microsoft and the link in the email shows that it will go to firebasestorage.googleapis.com/v0... you shouldn't trust it. It's best not to click any links in the emails but to visit the company website that sent you the email in the first place.
• Don't blindly trust email attachments: Most commonly, legitimate companies will ask you to log in to their website and to view any documents there; if you received an email with an attachment, it's a good idea to scan it with an antivirus application. Infected email attachments are a common attack vector used by cybercriminals.

To minimise the risk of opening phishing and malicious emails we recommend using Combo Cleaner Antivirus for Windows. 

Example of a spam email:

What to do if you fell for an email scam?

• If you clicked on a link in a phishing email and entered your password - be sure to change your password as soon as possible. Usually, cybercriminals collect stolen credentials and then sell them to other groups that use them for malicious purposes. If you change your password in a timely manner, there's a chance that criminals won't have enough time to do any damage.
• If you entered your credit card information - contact your bank as soon as possible and explain the situation. There's a good chance that you will need to cancel your compromised credit card and get a new one.
• If you see any signs of identity theft - you should immediately contact the Federal Trade Commission. This institution will collect information about your situation and create a personal recovery plan.
• If you opened a malicious attachment - your computer is probably infected, you should scan it with a reputable antivirus application. For this purpose, we recommend using Combo Cleaner Antivirus for Windows.
• Help other Internet users - report phishing emails to Anti-Phishing Working Group, FBI’s Internet Crime Complaint Center, National Fraud Information Center and U.S. Department of Justice.

Frequently Asked Questions (FAQ)

Why did I receive this email?

Spam emails are not personal, regardless of any relevant information that they may include. These messages are distributed in mass-scale campaigns – hence, thousands of users receive identical (or incredibly similar) emails.

I have provided my personal information when tricked by this spam email, what should I do?

In case the provided information was a password – change the log-in credentials of all possibly exposed accounts and inform their official support. And if the disclosed data was of a different personal nature (e.g., ID card details, passport photos/scans, credit/debit card numbers, etc.) – contact the corresponding authorities without delay.

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

No, reading an email poses no infection threat. Systems are compromised when malicious attachments or links are opened.

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

Whether an infection occurred might be influenced by the format of the opened file. If it was an executable (.exe, .run, etc.) – most likely, yes – since these formats cause infections almost without fail. However, you might have avoided this if it was a document (.doc, .xls, .pdf, etc.). Said formats may need extra actions (e.g., enabling macros, clicking embedded content, etc.) to start downloading/installing malware.

Will Combo Cleaner remove malware infections present in email attachments?

Yes, Combo Cleaner can scan systems for various threats. It is capable of detecting and removing most of the known malware infections. Note that sophisticated malicious programs typically hide deep within systems – therefore, running a complete system scan is paramount.

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