Sophos

W32/Sdbot-RA

Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Protection available since 8 November 2004 13:50:07 (GMT)
Detected by All Sophos products
  • Free virus, spyware, and adware scan
  • Test your existing anti-virus protection
  • Find threats your anti-virus missed

Action

More Information

W32/Sdbot-RA is a network worm and IRC backdoor Trojan for the Windows platform.

When first run W32/Sdbot-RA copies itself to the Windows system folder with the name feqfevhj.exe. In order to run on system start the worm creates the following registry entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
hpDexmark = feqfevhj.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
hpDexmark = feqfevhj.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
hpDexmark = feqfevhj.ex

W32/Sdbot-RA spreads through network shares protected by weak passwords. The worm uses the filename Fixmev2.exe when spreading through the network.

The backdoor component joins an IRC channel and awaits instructions from a remote user. The backdoor component can then be instructed to:

collect file system information
start a keylogger
download and execute arbitrary files
route HTTP traffic
start a port scanner
take part in distributed denial of service (DDoS) attacks

Sophos's anti-virus products include proactive protection technology, which can defend against new threats without requiring an update. Sophos customers have been protected against W32/Sdbot-RA (detected as W32/Sdbot-Fam) since version 3.85.

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