Sophos

W32/Rbot-GUP

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 30 October 2007 16:18:23 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Rbot-GUP is a worm with IRC backdoor functionality for the Windows platform.

W32/Rbot-GUP spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), WebDav (MS03-007), IIS5SSL (ms04-011) (CAN-2003-0719), Veritas (CAN-2004-1172), WINS (MS04-045), PNP (MS05-039), IMAIL Server, ASN.1 (MS04-007) and RealVNC (CVE-2006-2369) and by copying itself to network shares protected by weak passwords.

W32/Rbot-GUP 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-GUP copies itself to <Windows>\Msnhelper.exe and creates the file <Windows>\images.zip. images.zip contains a copy of the worm executable with the PIF extension.

The following registry entry is created to run Msnhelper.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
MSN
Msnhelper.exe

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