Sophos

Sophos blogs

W32/Agobot-ABR

Aliases
  • Backdoor.Win32.Agobot.gen
  • W32.IRCBot
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 10 April 2006 20:07:30 (GMT)
Detected by All Sophos products
  • Free virus, spyware, and adware scan
  • Test your existing anti-virus protection
  • Find threats your anti-virus missed

Action

More Information

W32/Agobot-ABR is a worm with backdoor functionality for the Windows platform.

W32/Agobot-ABR spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: PNP (MS05-039) and ASN.1 (MS04-007).

W32/Agobot-ABR 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. W32/Agobot-ABR is a worm with backdoor functionality for the Windows platform.

W32/Agobot-ABR spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: PNP (MS05-039) and ASN.1 (MS04-007).

W32/Agobot-ABR 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/Agobot-ABR copies itself to <Windows system folder>\sslphp32.exe.

The following registry entries are created to run sslphp32.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Svcphpwin
sslphp32.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Svcphpwin
sslphp32.exe

Registry entries are set as follows:

HKCU\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
NoAutoUpdate
1

HKCU\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
AUOptions
1

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
NoAutoUpdate
1

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
AUOptions
1

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
AUOptions
1

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
0

Registry entries are created under:

HKCU\Software\Microsoft\Security Center\
HKLM\SOFTWARE\Microsoft\Security Center\

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