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WORM_MYTOB.LP
Overview

Malware type: Worm

Aliases: Email-Worm.Win32.Doombot.b (Kaspersky), W32.Mytob.KU@mm (Symantec), Worm/Mytob.KS (Avira), W32/Mytob-GH (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:


Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This memory-resident worm arrives as an attachment to email messages. The email message usually poses as an account notification in order to trick a user into downloading and executing the attachment.

The email it sends out has the following details:

Subject:(any of the following)
• Notice of account limitation
• Email Account Suspension
• Security measures
• Members Support
• Important Notification
• Warning Message: Your services near to be closed.
• Your Account is Suspended For Security Reasons
• Your password has been successfully updated
• *DETECTED* Online User Violation
• Your Account is Suspended
• Your new account password is approved
• You have successfully updated your password
• Your password has been successfully updated
• Your password has been updated

Message body: (any of the following)
---
Dear user {name of recipient},

You have successfully updated the password of your {random domain name} account.

If you did not authorize this change or if you need assistance with your account, please contact {random domain name} customer service at: {mail@random domain name}

Thank you for using {random domain name}!

The {random domain name} Support Team

+++ Attachment: No Virus (Clean)
+++ {random antivirus name} Antivirus - www.{random domain name}.com

---
Dear user {name of recipient},

It has come to our attention that your {random domain name} User Profile ( x ) records are out of date. For further details see the attached document.

Thank you for using {random domain name}!

The {random domain name} Support Team

+++ Attachment: No Virus (Clean)
+++ {random domain name} Antivirus - www.{random domain name}.com

---
Dear {random domain name} Member,

We have temporarily suspended your email account {email 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 {random domain name} account.

Sincerely,The {random domain name} Support Team

+++ Attachment: No Virus (Clean)
+++ {random domain name } Antivirus - www.{random domain name}.com

---
Dear {random domain name} 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 {random domain name} Support Team

+++ Attachment: No Virus (Clean)
+++ {random domain name} Antivirus - www.{random domain name}.com

Attachment: (any of the following)
• 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
• EXE
• PIF
• SCR
• ZIP

This worm has backdoor capabilities. It opens various ports, allowing a remote user to perform malicious commands on the affected machine. The said routine provides remote users virtual control over affected systems, thus compromising system security.

Moreover, it prevents affected users from accessing several antivirus and security Web sites by modifying the HOSTS file. It also terminates several processes running in memory.

For additional information about this threat, see:
Solution
Technical Details

Description created: Oct. 15, 2005 3:49:22 PM GMT -0800

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