high
Summary
Summary
Action- More Information
| Affected operating systems | Windows |
|---|---|
| Characteristics |
|
| Protection available since | 9 June 2005 10:04:47 (GMT) |
| Detected by | All Sophos products |
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Action
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More Information
Troj/Feutel-H is a keylogging backdoor Trojan. Troj/Feutel-H runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer.
On Windows 9x operating systems, when first run Troj/Feutel-H moves itself as a hidden, read-only, system file <Windows>\RasMan.exe and creates the hidden, read-only, system files <Windows>\RasMan.DLL and <Windows>\RasManKey.DLL. These DLL files are detected by Sophos as Troj/Feutel-H.
Troj/Feutel-H also creates the file <System>\COMGP32LOG.dll. This file may be deleted.
The following registry entry is then created to run RasMan.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
RasMan.exe
<Windows>\RasMan.exe
On Windows NT based operating systems, Troj/Feutel-H moves itself as a hidden, read-only, system file <Windows>\RasMan.exe and creates the hidden, read-only, system file <Windows>\RasMan.DLL. This file is the same file as <Windows>\RasMan.DLL that was created under Windows 9x operating systems and is detected by Sophos as Troj/Feutel-H.
Troj/Feutel-H then installs itself as a service named RasManager, with a display name of "RasMan.exe". Registry entries will be created under the following branches:
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_RASMANAGER
HKLM\SYSTEM\CurrentControlSet\Services\RasManager
In particular, the following registry entry will be set:
HKLM\SYSTEM\CurrentControlSet\Services\RasManager
ImagePath
<Windows>\RasMan.exe
Troj/Feutel-H sets up a keylogging component and a backdoor which allows a remote intruder to control the infected computer.
Troj/Feutel-H contains backdoor functionality that allows a remote user to:
- steal confidential information
- access the computer's file system
- create screen and video captures
- listen in on the infected computer
- download, install and run new software without notification that it is doing so
Troj/Feutel-H changes settings for Microsoft Internet Explorer by modifying values under:
HKCU\Software\Microsoft\Internet Explorer\Main
FullScreen
no
HKCU\Software\Microsoft\Internet Explorer\Main
Check_Associations
no
HKCU\Software\Microsoft\Internet Explorer\Toolbar
Locked
00000001
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