high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Protection available since | 3 August 2005 16:08:24 (GMT) |
| Detected by | All Sophos products |
Free virus scan
- Free virus, spyware, and adware scan
- Test your existing anti-virus protection
- Find threats your anti-virus missed
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
Replace the Hosts file from a backup or edit it in Notepad to remove the changes that the worm has made.
You will also need to edit the following registry entries, if they are present. Please read the warning about editing the registry.
At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.
Locate the HKEY_LOCAL_MACHINE entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
and remove any reference to any file you deleted.
Close the registry editor.
More Information
W32/Mytob-DY spreads through email. W32/Mytob-DY harvests email addresses from files on the infected computer and from the Windows address book. Email sent by W32/Mytob-DY has the following properties:
Subject line:
Your Account is Suspended
*DETECTED* Online User Violation
Your Account is Suspended For Security Reasons
Warning Message: Your services near to be closed.
Important Notification
Members Support
Security measures
Email Account Suspension
Notice of account limitation
Your password has been updated
Your password has been successfully updated
You have successfully updated your password
Your new account password is approved
Message text:
Dear user [str],
You have successfully updated the password of your [str] account.
If you did not authorize this change or if you need assistance with your account, please contact [str] customer service at: [str]
Thank you for using [str]!
The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear user [str],
It has come to our attention that your [str] User Profile ( x ) records are out of date. For further details see the attached document.
Thank you for using [str]!
The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear [str] Member,
We have temporarily suspended your email account [str].
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 [str] account.
Sincerely,The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear [str] 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 [str] Support Team
+++ Attachment: No Virus found
+++ [str] Antivirus - www.[str]
In the above message text [str] would be replaced with text from the user's email address.
The attached file consists of a base name followed by the extensions CMD, PIF, SCR, EXE or ZIP. The worm may optionally create double extensions where the first extension is DOC, TXT or HTM and the final extension is BAT, CMD, PIF, SCR, EXE or ZIP. The base filenames are randomly chosen from:
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
Sophos's anti-virus products include Genotype™ detection technology, which can proactively protect against new threats without requiring an update. Sophos customers have been protected against W32/Mytob-DY (detected as W32/MyDoom-Gen) since version 3.94. W32/Mytob-DY spreads through email. W32/Mytob-DY harvests email addresses from files on the infected computer and from the Windows address book. Email sent by W32/Mytob-DY has the following properties:
Subject line:
Your Account is Suspended
*DETECTED* Online User Violation
Your Account is Suspended For Security Reasons
Warning Message: Your services near to be closed.
Important Notification
Members Support
Security measures
Email Account Suspension
Notice of account limitation
Your password has been updated
Your password has been successfully updated
You have successfully updated your password
Your new account password is approved
Message text:
Dear user [str],
You have successfully updated the password of your [str] account.
If you did not authorize this change or if you need assistance with your account, please contact [str] customer service at: [str]
Thank you for using [str]!
The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear user [str],
It has come to our attention that your [str] User Profile ( x ) records are out of date. For further details see the attached document.
Thank you for using [str]!
The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear [str] Member,
We have temporarily suspended your email account [str].
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 [str] account.
Sincerely,The [str] Support Team
+++ Attachment: No Virus (Clean)
+++ [str] Antivirus - www.[str]
Dear [str] 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 [str] Support Team
+++ Attachment: No Virus found
+++ [str] Antivirus - www.[str]
In the above message text [str] would be replaced with text from the user's email address.
The attached file consists of a base name followed by the extensions CMD, PIF, SCR, EXE or ZIP. The worm may optionally create double extensions where the first extension is DOC, TXT or HTM and the final extension is BAT, CMD, PIF, SCR, EXE or ZIP. The base filenames are randomly chosen from:
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
When run, W32/Mytob-DY copies itself to the Windows system folder as raloded.exe and sets the following registry entries in order to run each time a user logs on:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Msn Service
raloded.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Msn Service
raloded.exe
W32/Mytob-DY sets the following registry entries, disabling the automatic startup of other software:
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4
W32/Mytob-DY modifies the HOSTS file, changing the URL-to-IP mappings for selected websites, therefore preventing normal access to these sites:
127.0.0.1 avp.com
127.0.0.1 ca.com
127.0.0.1 customer.symantec.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 download.mcafee.com
127.0.0.1 ebay.com
127.0.0.1 f-secure.com
127.0.0.1 kaspersky-labs.com
127.0.0.1 kaspersky.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 mast.mcafee.com
127.0.0.1 mcafee.com
127.0.0.1 microsoft.com
127.0.0.1 moneybookers.com
127.0.0.1 my-etrust.com
127.0.0.1 nai.com
127.0.0.1 networkassociates.com
127.0.0.1 pandasoftware.com
127.0.0.1 paypal.com
127.0.0.1 rads.mcafee.com
127.0.0.1 secure.nai.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 sophos.com
127.0.0.1 symantec.com
127.0.0.1 trendmicro.com
127.0.0.1 update.symantec.com
127.0.0.1 updates.symantec.com
127.0.0.1 us.mcafee.com
127.0.0.1 viruslist.com
127.0.0.1 viruslist.com
127.0.0.1 virustotal.com
127.0.0.1 www.amazon.ca
127.0.0.1 www.amazon.co.uk
127.0.0.1 www.amazon.com
127.0.0.1 www.amazon.fr
127.0.0.1 www.avp.com
127.0.0.1 www.ca.com
127.0.0.1 www.ebay.com
127.0.0.1 www.f-secure.com
127.0.0.1 www.grisoft.com
127.0.0.1 www.kaspersky.com
127.0.0.1 www.mcafee.com
127.0.0.1 www.microsoft.com
127.0.0.1 www.moneybookers.com
127.0.0.1 www.my-etrust.com
127.0.0.1 www.nai.com
127.0.0.1 www.networkassociates.com
127.0.0.1 www.pandasoftware.com
127.0.0.1 www.paypal.com
127.0.0.1 www.sophos.com
127.0.0.1 www.symantec.com
127.0.0.1 www.trendmicro.com
127.0.0.1 www.viruslist.com
127.0.0.1 www.virustotal.com
Sophos's anti-virus products include Genotype™ detection technology, which can proactively protect against new threats without requiring an update. Sophos customers have been protected against W32/Mytob-DY (detected as W32/MyDoom-Gen) since version 3.94.
|
