Sophos

W32/Rbot-LX

Aliases
  • Backdoor.Win32.Rbot.gen
  • W32/Sdbot.worm.gen.j
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
  • Chat programs
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 7 October 2004 07:39:48 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Rbot-LX is a worm which attempts to spread to remote network shares. It also contains backdoor Trojan functionality, allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service process.

W32/Rbot-LX spreads to network shares with weak passwords as a result of the backdoor Trojan element receiving the appropriate command from a remote user. The worm may also spread via IRC channels.

W32/Rbot-LX copies itself to the Windows system folder as MSLTI32.EXE and creates entries in the registry at the following locations to run itself on system startup:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Update = Mslti32.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsoft Update = Mslti32.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Update = Mslti32.exe

W32/Rbot-LX may try to set the following registry entry to disable DCOM

HKLM\Software\Microsoft\OLE\
EnableDCOM = "N"

W32/Rbot-LX may try to set the following registry entry to restrict access to the IPC$ share on the infected computer:

HKLM\SYSTEM\CurrentControlSet\Control\Lsa\
restrictanonymous = "1"

W32/Rbot-LX may use various exploits, including RPC-DCOM and LSASS.

W32/Rbot-LX may attempt to terminate various anti-virus and security products.

W32/Rbot-LX may open a remote command shell, delete network shares, capture webcam images, log keypresses, participate in DDOS attacks and steal keys for various
software products.

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