TSPY_FRETHOG.LP
Windows 2000, XP, Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This spyware executes then deletes itself afterward.
It adds registry entries to enable its automatic execution at every system startup.
TECHNICAL DETAILS
Installation
This spyware drops the following component file(s):
- %User Temp%\4tddfwq0.dll - also detected as TSPY_FRETHOG.LP
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
It drops the following copies of itself into the affected system:
- %User Temp%\xvassdf.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
It executes then deletes itself afterward.
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
54dfsger = %User Temp%\xvassdf.exe
Other System Modifications
This spyware adds the following registry keys as part of its installation routine:
HKEY_CLASSES_ROOT\CLSID\MADOWN
Process Termination
This spyware terminates the following processes if found running in the affected system's memory:
- VCRMON.EXE
- Update.exe
- CCSVCHST.EXE
- ALUSCHEDULERSVC.EXE
- luall.exe
- ASHDISP.EXE
- EKRN.EXE
- AVP.EXE
- UFSEAGNT.EXE
- SfFnUp.exe
- UfUpdUi.exe
- AVGNT.EXE
- preupd.exe
- VSTSKMGR.EXE
- mcupdate.exe
- AVGRSX.EXE
- avgupd.exe
- svchost.exe
- LIVESRV.EXE
- aseNXD.EXE
Download Routine
This spyware connects to the following Web site(s) to download and execute a malicious file:
- http://www.{BLOCKED}sw.com/1rb/ar1.rar
- http://www.{BLOCKED}wf.com/1rb/ar.rar
Other Details
This spyware does the following:
- Its DLL component is injected to several processes running in memory.
- It injects codes into the following processes related to popular online games to steal sensitive information such as user names and passwords:
- ARAD.exe
- pol.exe
- maplestory.exe
- red stone.exe
- cabalmain.exe
- coc.exe Ragexe.exe
- InphaseNXD.EXE
- Atlantica.exe
- cabalmain.exe
SOLUTION
Step 1
For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer"s registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- 54dfsger = %User Temp%\xvassdf.exe
- 54dfsger = %User Temp%\xvassdf.exe
Step 4
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer"s registry. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.
- In HKEY_CLASSES_ROOT\CLSID
- MADOWN
- MADOWN
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_FRETHOG.LP If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Did this description help? Tell us how we did.