Troj/Torpig-A

Please follow the instructions for removing Trojans.

Change any data that may have become compromised.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry for each user who ran the virus. 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.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKU\[code number]\Software\Microsoft\Windows\CurrentVersion\Run\
explorer
<Windows system folder>\service\explorer.exe

and delete it if it exists.

Close the registry editor.

Troj/Torpig-A is a Trojan for the Windows platform.

The Trojan logs keypresses and open window titles to text files and periodically sends the collected information to a remote user via HTTP.

The Trojan downloads and executes additional files from a remote site. Configuration files may also be downloaded which define further behaviors. Troj/Torpig-A is a Trojan for the Windows platform.

When run, Troj/Torpig-A creates a subfolder under the Windows system folder named "service" and creates the following files:

<Windows system folder>\service\dll.dll
<Windows system folder>\service\dllp.txt
<Windows system folder>\service\explorer.exe

The dll.dll file is a keylogging component while the dllp.txt file is used for data storage.

In order to run each time a user logs on, Troj/Torpig-A sets the following registry entry:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
explorer
<Windows system folder>\service\explorer.exe

The Trojan logs keypresses and open window titles to text files and periodically sends the collected information to a remote user via HTTP.

The Trojan downloads and executes additional files from a remote site. Configuration files may also be downloaded which define further behaviors.

Troj/Torpig-A automatically closes security warning messages displayed by common anti-virus and security related applications.

The Trojan may set several entries under the following registry locations:

HKCU\Software\Microsoft\Windows\CurrentVersion\pwd

HKCU\Software\Microsoft\Windows\CurrentVersion\gnum

HKCU\Software\Microsoft\Windows\CurrentVersion\myID2