Sophos

Troj/Agent-DI

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from June 2005 (3.94)
Protection available since 14 April 2005 13:25:59 (GMT)
Detected by All Sophos products

Action

Please follow the instructions for removing Trojans.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WindowsUpdate =
%System%\svchost.exe /s

and delete it if it exists.

Close the registry editor.

More Information

Troj/Agent-DI is a backdoor Trojan for the Windows platform.

Troj/Agent-DI allows unauthorised remote access to the infected computer, running in the background waiting for commands from a remote intruder. The Trojan can be instructed to download and run arbitrary files.

Troj/Agent-DI may disable the Windows Firewall and turn off notification of lack of Anti-virus software on the computer. The Trojan may also download configuration data from:

http://bn.inf3ct3d.info Troj/Agent-DI is a backdoor Trojan for the Windows platform.

Troj/Agent-DI allows unauthorised remote access to the infected computer, running in the background waiting for commands from a remote intruder. The Trojan can be instructed to download and run arbitrary files.

Troj/Agent-DI may disable the Windows Firewall and turn off notification of lack of Anti-virus software on the computer. The Trojan may also download configuration data from:

http://bn.inf3ct3d.info

Troj/Agent-DI copies itself to the Windows system folder as "svchost.exe" and creates a DLL file named "svchost.dll". The Trojan sets the following registry entry in order to run automatically on computer login:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WindowsUpdate =
%System%\svchost.exe /s

Troj/Agent-DI creates registry entries for its own use under:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellBot

The Trojan attempts to reduce system security by altering the following registry entries:

HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters
\FirewallPolicy\StandardProfile\EnableFireWall

HKLM\SOFTWARE\Microsoft\Security Center\FireWallDisableNotify

HKLM\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify

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