W32/Rbot-BAX is a worm and IRC backdoor Trojan for the Windows platform.
W32/Rbot-BAX spreads:
- to other network computers infected with Troj/Optix
- to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011) and RPC-DCOM (MS04-012)
- by copying itself to network shares protected by weak passwords
W32/Rbot-BAX may spread using the filename WinntUpdate.exe.
W32/Rbot-BAX 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-BAX copies itself to <System>\<11 random chars>.exe and creates the clean log file debug.txt.
The following registry entries are created to run itself on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Moniter Control
<worm filename>
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Moniter Control
<worm filename>
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Moniter Control
<worm filename>