Sophos

W32/Rbot-AJT

Aliases
  • Backdoor.Win32.Rbot
  • W32.Spybot.Worm
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 October 2005 (3.98)
Protection available since 4 August 2005 15:15:54 (GMT)
Last updated 1 September 2005 12:37:58 (GMT)
Detected by All Sophos products

Action

More Information

W32/Rbot-AJT is a worm and IRC backdoor Trojan for the Windows platform.

W32/Rbot-AJT spreads to computers vulnerable to the LSASS, RPC-DCOM, and WKS exploits, and to weakly protected network shares.

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

MS04-012
MS04-011
MS03-049

W32/Rbot-AJT runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

When first run W32/Rbot-AJT copies itself to <System>\steam.exe.

The following registry entries are created to run steam.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
steam
steam.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
steam
steam.exe

Registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

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