Sophos

W32/Rbot-AZZ

Aliases
  • Backdoor.Win32.Rbot.gen
  • W32/Sdbot.worm.gen.bw
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 2006 (4.02)
Protection available since 4 December 2005 23:08:44 (GMT)
Detected by All Sophos products

Action

More Information

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

W32/Rbot-AZZ spreads:

- to other network computers infected with: Troj/Kuang, Troj/Sub7, Troj/NetDevil, W32/MyDoom, W32/Bagle and Troj/Optix
- to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WebDav (MS03-007), IIS5SSL (MS04-011) (CAN-2003-0719), UPNP (MS01-059) and Dameware (CAN-2003-1030)
- by copying itself to network shares protected by weak passwords

W32/Rbot-AZZ 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-AZZ copies itself to <System>\updat.exe.

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

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

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

The following registry entry is set:

HKCU\Software\Microsoft\OLE
updat
updat.exe

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