Sophos

W32/Rbot-SF

Aliases
  • W32/Sdbot.worm.gen.t
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 February 2005 (3.90)
Protection available since 22 December 2004 11:07:20 (GMT)
Last updated 23 December 2004 00:13:17 (GMT)
Detected by All Sophos products

Action

More Information

W32/Rbot-SF is a network worm and backdoor Trojan for the Windows platform. W32/Rbot-SF allows a malicious user remote access to an infected computer.

The worm copies itself to a file named wruauclt.exe in the Windows system folder and creates the following registry entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
*windows update
wruauclt.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
*windows update
wruauclt.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
*windows update
wruauclt.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
*windows update
wruauclt.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
*windows update
wruauclt.exe

W32/Rbot-SF spreads using a variety of techniques including exploiting weak password on computers and SQL servers, exploiting operating system vulnerabilites (including DCOM-RPC and LSASS).

W32/Rbot-SF can be controlled by a remote attacker over IRC channels.

The following patches for the operating system vulnerabilities exploited by W32/Rbot-SF can be obtained from the Microsoft website:

MS04-011
MS03-026

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/Rbot-SF (detected as W32/Rbot-Fam) since version 3.88.

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