Virus Profile: BackDoor-AVF

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Virus Profile information details
Risk Assessment: Home Low-Profiled | Corporate Low-Profiled
Date Discovered: 6/2/2003
Date Added: 6/2/2003
Origin: Unknown
Length: 61440 bytes
Type: Trojan
Subtype: -
DAT Required: 4271
Removal Instructions
   
 
 
   

Description

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

  • port TCP80 open on the victim machine.
  • existence of files and registry keys as mentioned above.
  • outgoing traffic to 66.220.17.33

    • Methods of Infection

    Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, etc.
       

    Virus Characteristics

    -- Update June 14, 2003 --
    This threat was updated to a Low-Profiled risk due to media attention at: http://news.bbc.co.uk/2/hi/technology/2987558.stm

    This is a detection for a trojan that opens port TCP 80 (HTTP) on the victim machine. Incoming requests on that port are redirected to website in the internet.


    After execution, the trojan copies itself as SYS64.EXE into %WINDIR%\SYSTEM32.

    The worm creates a registry run key to load itself at system startup:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    "Tuneling" = SYS64.EXE

    • It runs HTTP server on port TCP80 and redirects incoming requests to http://promin.*OMITTED*.gs. It also sends on start a notification to the IP address 66.220.17.33 containing information about the victim.
       

    All Users:
    Use current engine and DAT files for detection and removal.

    Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

    Additional Windows ME/XP removal considerations