Summary

Summary
Action
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| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 18 November 2005 03:13:17 (GMT) |
| Detected by | All Sophos products |
- Endpoint Security and Control 9.0
- Small business solutions 4.0
Action

Summary
Action
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Please follow the instructions for removing worms.
More Information
W32/Katomik-A is a worm for the Windows platform.
W32/Katomik-A spreads to other computers through network shares.
W32/Katomik-A disables the registry editor and task manager, and changes the Desktop wallpaper.
When first run W32/Katomik-A copies itself to:
\AtomicpartC.exe
<Windows>\K-set.bmp
<System>\Atomic-x27.exe
<System>\mastoer32.dll
and creates the file \@li-Rno.H.Bmp, which is a harmless image file.
The following registry entries are created to run AtomicpartC.exe and Atomic-x27.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Atomic-x27C
AtomicpartC.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Atomic-x27
<System>\Atomic-x27.exe
The following registry entries are set, disabling the registry editor (regedit) and the Windows task manager (taskmgr):
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1
The following registry entry is set:
HKCU\Control Panel\Desktop
wallpaper
@li-Rno.H.Bmp
