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Malware type: Trojan
Destructive: No
Platform: Windows 98, ME, NT, 2000, XP, Server 2003
Encrypted: No
In the wild: Yes

Technical Details

File size: 98,816 bytes
File type: PE
Memory resident: Yes
Initial samples received date: 23 Dec 2009
Payload: Terminates processes, Connects to URLs/Ips


This Trojan adds the following possibly malicious files or file components:

  • %System%\791885.dll
  • %System%\847286.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

{malware name} = {malware path and file name}

Process Termination

This Trojan terminates the following processes if found running in the affected system's memory:

  • explorer.exe

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://www.{BLOCKED}


Minimum scan engine: 8.900
First VSAPI Pattern File: 6.712.03
First VSAPI Pattern Release Date: 23 Dec 2009
VSAPI OPR Pattern Version: 6.713.00
VSAPI OPR Pattern Release Date: 23 Dec 2009

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product and note files detected as TROJ_FAKEAV.MVE

Step 3

Restart in Safe Mode

[ Learn more ]

Step 4

Delete this registry value

[ Learn more ]

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\Policies\Explorer\Run
    • {malware name} = {malware path and name}

Step 5

Search and delete these files

[ Learn more ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %System%\791885.dll
  • %System%\847286.dl

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.MVE. 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.

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