Sophos

W32/Sdbot-AFE

Aliases
  • W32/Sdbot.worm.gen.q
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from December 2005 (4.00)
Protection available since 5 November 2005 21:39:02 (GMT)
Detected by All Sophos products

Action

More Information

W32/Sdbot-AFE is a network worm with backdoor functionality for the Windows platform.

The worm spreads through network shares protected by weak passwords, MS-SQL servers and an operating system vulnerability.

W32/Sdbot-AFE connects to a predetermined IRC channel and awaits further commands from remote users. The backdoor component of W32/Sdbot-AFE can be instructed to perform the following functions:

scan networks for vulnerabilities
download/execute arbitrary files
start an ftp server

When first run, W32/Sdbot-AFE copies itself to the Windows system folder as clipservr.exe and creates the following registry entries in order to run each time a user logs on:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ClipSrv
clipservr.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ClipSrv
clipservr.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
ClipSrv
clipservr.exe

A patch for the vulnerability exploited by W32/Sdbot-AFE can be obtained from Microsoft at:

MS05-039

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