Sophos

W32/Rbot-AZU

Aliases
  • Backdoor.Win32.IRCBot.jw
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Protection available since 1 December 2005 13:56:48 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Rbot-AZU is a Trojan for the Windows platform.

W32/Rbot-AZU 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-AZU copies itself to <System>\loc1.exe and creates the following files:

<System>\msdirectx.sys
\xz.bat

The file xz.bat is detected as Troj/KillProc-A and the file msdirectx.sys is detected as Troj/NtRootK-F. W32/Rbot-AZU is a Trojan for the Windows platform.

W32/Rbot-AZU 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-AZU copies itself to <System>\loc1.exe and creates the following files:

<System>\msdirectx.sys
\xz.bat

The file xz.bat is detected as Troj/KillProc-A and the file msdirectx.sys is detected as Troj/NtRootK-F.

The following registry entries are created to run loc1.exe on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
strtas
loc1.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
strtas
loc1.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
strtas
loc1.exe

The file msdirectx.sys is registered as a new system driver service named "msdirectx", with a display name of "msdirectx". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\msdirectx\

The following registry entries are set, affecting internet security:

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
FirewallPolicy\

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall
0

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