Sophos

W32/Rbot-ARO

Aliases
  • Backdoor.Win32.IRCBot.az
  • BKDR_IRCBOT.AY
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Included in our products from November 2005 (3.99)
Protection available since 12 October 2005 02:44:38 (GMT)
Detected by All Sophos products

Action

More Information

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

W32/Rbot-ARO 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), Veritas (CAN-2004-1172), MSSQL (MS02-039) (CAN-2002-0649) and ASN.1 (MS04-007).

W32/Rbot-ARO 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-ARO copies itself to <System>\cnsg.pif.

The following registry entries are created to run cnsg.pif on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Intrenet Explorer
cnsg.pif

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Intrenet Explorer
cnsg.pif

The following registry entry is set:

HKCU\Software\Microsoft\OLE
Microsoft Intrenet Explorer
cnsg.pif

The following patches for the operating system vulnerabilities exploited by W32/Rbot-ARO can be obtained from the Microsoft website:
MS04-011
MS04-012
MS03-049
MS04-007
MS02-039

RSS|Atom
Get reports about the latest virus and spyware threats delivered to your computer