Sophos

W32/Sdbot-OU

Aliases
  • Backdoor.SdBot.np
  • BKDR_SDBOT.GEN
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 8 September 2004 08:25:39 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

More Information

W32/Sdbot-OU is a network worm and backdoor Trojan. The worm spreads by copying itself to network shares that have weak passwords.

W32/Sdbot-OU creates a copy of itself named MAJDE.EXE in the Windows system folder and adds the following registry entries to ensure that the copy is run each time the computer restarts:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
ValuSet = MaJde.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
ValuSet = MaJde.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
ValuSet = MaJde.exe

The backdoor component of the worm attempts to connect to an IRC server and awaits commands from a remote attacker.

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