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W32/Delbot-AI

Aliases
  • W32.Rinbot.A
  • Backdoor.Win32.VanBot.bx
  • W32/Nirbot.worm
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 17 April 2007 11:03:08 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Delbot-AI is an IRC worm with backdoor functionality which allows a remote intruder to gain access and control over the computer. W32/Delbot-AI is an IRC worm with backdoor functionality which allows a remote intruder to gain access and control over the computer.

W32/Delbot-AI includes functionality to download, install and run new software.

W32/Delbot-AI spreads to other network computers by:

-scanning network shares for weak passwords
-exploiting common buffer overflow vulnerabilities, including Symantec (SYM06-010).
- Microsoft Security Advisory (935964): Vulnerability in RPC on Windows DNS Server Could Allow Remote Code Execution.

When first run W32/Delbot-AI copies itself to <System>\mdnex.exe. The following registry entry is created to run it on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft DNSx
<System>\mdnex.exe

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