high
Summary
Summary
Action- More Information
| How it spreads |
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|---|---|
| Affected operating systems | Windows |
| Characteristics |
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| Protection available since | 16 December 2004 04:37:20 (GMT) |
| Detected by | All Sophos products |
Sophos beta program
- Endpoint Security and Control 9.0
- Small business solutions 4.0
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
Editing Win.ini
At the taskbar, click Start|Run and type Sysedit. Bring Win.ini to the front. In the [windows] section, search for a line beginning with 'Run=' and delete any references to the files you removed. Delete only that reference, not any other text.
Windows NT/2000/XP/2003
In Windows NT/2000/XP/2003 you will also need to edit the following registry entry for each user who ran the virus. The removal of this entry is optional in Windows 95/98/Me. 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.
Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:
HKU\[code number]\Software\Microsoft\Windows NT\CurrentVersion\Windows\
run\%SYSTEM%\dec25.exe
and delete it if it exists.
Close the registry editor.
More Information
W32/Atak-I is a mass-mailing worm. W32/Atak-I is a mass-mailing worm.
W32/Atak-I arrives in an email with one of the following subject lines:
Merry X-Mas!
Happy New Year!
The subject line may be differently capitalised.
The message text contains the one of the following lines:
Happy New year and wish you good luck on next year!
Mery Chrismas & Happy New Year! 2005 will be the beginning!
The worm is included in the email as an attachment. This attachment may be the worm executable itself or a ZIP file containing the executable. The executable name is chosen so that both the main name and the extension belong to the following list:
PIF, COM, SCR, BAT
If the file attached is a ZIP file, this is given one of the above names with a ZIP extension.
W32/Atak-I harvests email addresses from files on the system drive and on drives C: to Z: which have file extension LOG, HTML, MSG, EML, MHT, DBX, ASP, PHP, JSP, HTM or TXT.
When first run, W32/Atak-I copies itself to the Windows system folder as dec25.exe and adds the following line to the win.ini file to ensure it is run at system startup:
run = %SYSTEM%\dec25.exe
The worm also creates the following registry entry in order to run itself on system startup:
HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows\run
%SYSTEM%\dec25.exe
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