| Description:
Similar to other WORM_MYTOB variants, this memory-resident worm propagates by sending a copy of itself as an attachment to an email message, which it sends to target recipients using its own Simple Mail Transfer Protocol (SMTP) engine. The email it sends out has the following details: Subject: (any of the following)
• {Random}
• *DETECTED* Online User Violation
• Email Account Suspension
• Important Notification
• Members Support
• Notice of account limitation
• Security Measures
• You have successfully updated your password
• Your account is suspended
• Your Account is Suspended For Security Reasons
• Your new account password is approved
• Your password has been successfully updated
• Your password has been updated
Message body: (any of the following)
• Dear user {User name}
You have successfully updated the password of your {Domain} account.
If you did not authorize this change or if you need assistance with your account, please contact {Domain} customer service at: {Domain-Address}
Thank you for using {Domain}!
The {Domain} Support Team
+++ Attachment: No Virus (Clean)
+++ %s Antivirus - www.{Domain-address}
• Dear user {User name}
It has come to our attention that your {Domain} User Profile ( x ) records are out of date. For further details see the attached document.
Thank you for using {Domain}!
The {Domain} Support Team
+++ Attachment: No Virus (Clean)
+++ %s Antivirus - www.{Domain-Address}.
• Dear {Domain} Member,
We have temporarily suspended your email account {Emaild-address}.
This might be due to either of the following reasons:
1. A recent change in your personal information (i.e. change of address).
2. Submiting invalid information during the initial sign up process.
3. An innability to accurately verify your selected option of subscription due to an internal error within our processors.See the details to reactivate your {Domain} account.
Sincerely,The {Domain} Support Team
+++ Attachment: No Virus (Clean)
+++ %s Antivirus - www.{Domain-Address}
• Dear {Domain} Member,
Your e-mail account was used to send a huge amount of unsolicited spam messages during the recent week. If you could please take 5-10 minutes out of your online experience and confirm the attached document so you will not run into any future problems with the online service.
If you choose to ignore our request, you leave us no choice but to cancel your membership.
Virtually yours,
The {Domain} Support Team
+++ Attachment: No Virus found
+++ %s Antivirus - www.{Domain-Address}
Attachment: (any of the following file names)
• {Random}
• accepted-password
• account-details
• account-info
• account-password
• account-report
• approved-password
• document
• email-details
• email-password
• important-details
• new-password
• password
• readme
• updated-password
(with any of the following extensions)
• BAT
• CMD
• DOC
• HTM
• TMP
• TXT
(Note: %s is a company name used by this worm.) Email messages sent by this worm may look like any of the following: 
It gathers target email addresses from the Windows Address Book (WAB). It may also generate email addresses by using a list of names and any of the domain names of the previously gathered addresses. This worm has backdoor capabilities, which allow a remote user to perform malicious commands on the affected system. Using random ports, it connects to an Internet Relay Chat (IRC) channel, where it waits for commands from the remote user. Furthermore, this worm modifies the HOSTS file, which prevents the user from accessing certain Web sites. Most of these sites are related to antivirus and security applications. This worm terminates processes, most of which are related to antivirus programs, security applications, and other malware programs.
For additional information about this threat, see:
Solution
Technical Details
Statistics
Source: trenmicro.com
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