Sophos

W32/Rbot-AXJ

Aliases
  • WORM_RBOT.CRR
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 15 November 2005 21:55:14 (GMT)
Last updated 24 April 2007 08:30:39 (GMT)
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Action

More Information

W32/Rbot-AXJ is a network worm with backdoor Trojan functionality for the Windows platform.

W32/Rbot-AXJ spreads using a variety of techniques including:
-exploiting weak passwords on computers and SQL servers
-exploiting operating system vulnerabilities
-using backdoors opened by other worms or Trojans.

W32/Rbot-AXJ can be controlled by a remote attacker over IRC channels. The backdoor component of W32/Rbot-AXJ can be instructed by a remote user to perform the following functions:

start an FTP server
start a Proxy server
start a web server
take part in distributed denial of service (DDoS) attacks
log keypresses
capture screen/webcam images
packet sniffing
port scanning
download/execute arbitrary files
start a remote shell (RLOGIN)
steal product registration information from certain software

The worm copies itself to a file named nlsmon.exe in the Windows system folder. The following registry entries are created to run nlsmon.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
NLS Monitor
nlsmon.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
NLS Monitor
nlsmon.exe

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
NLS Monitor
nlsmon.exe

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

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