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Date discovered:17/08/2011
In the wild:No
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:131.584 Bytes
MD5 checksum:FEF26399FD6188C653C8CB6A91FBE5C0
VDF version:
IVDF version:

 General Methods of propagation:
   • Autorun feature
   • Messenger

   •  Sophos: Troj/Agent-TBW
   •  Microsoft: Trojan:Win32/VB.AHB
   •  AhnLab: Win-Trojan/Seint.131584.D

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7

Side effects:
   • Drops files
   • Lowers security settings
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • C:\Documents and Settings\%current username%\Application Data\%random character string%.exe

It deletes the initially executed copy of itself.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "%random character string%"="C:\Documents and Settings\%current username%\Application Data\%random character string%.exe"

It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   • "%APPDATA%\%random character string%.exe"="%APPDATA%\%random
      character string%
.exe:*:Enabled:%random character string%"

 Messenger It is spreading via Messenger. The characteristics are described below:

– Windows Live Messenger

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: **********
Port: 26745
Nickname: %random character string%

– This malware has the ability to collect and send information such as:
    • Information about the Windows operating system

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • disconnect from IRC server
    • Join IRC channel
    • Leave IRC channel
    • Perform DDoS attack
    • Start spreading routine

 Backdoor The following port is opened:

– svchost.exe on a random UDP port

 Stealing It tries to steal the following information:
– Passwords typed into 'password input fields'

– A logging routine is started after one of the following websites are visited:
   • *; *; *; *aol.*; *bigstring.*;
      *depositfiles.*; *; *dyndns*; *; *facebook.*;
      *fastmail.*; *; *; *; *gmx.*;
      *; *google.*; *hackforums.*; *; **;
      **; **; *; *megaupload.*;
      *members*.iknowthatgirl*; **; *moneybookers.*;
      *; *; *; *; *no-ip*;
      *; *; *paypal.*; *runescape*;
      **; *secure.logmein.*; *;
      *signin.ebay*SignIn; *; *; *steampowered*;
      *; *; *; *;
      *; *; *; *; *youporn.*

– It captures:
    • Login information

 Injection – It injects itself as a remote thread into a process.

    Process name:
   • explorer.exe

Access to the following websites is effectively blocked:
   • *bitdefender.*; *bullguard.*; *garyshood.*; *gdatasoftware.*;
      *kaspersky.*; *malwarebytes.*; *novirusthanks.*; **;
      *onlinemalwarescanner.*; *pandasecurity.*; *precisesecurity.*;
      *sunbeltsoftware.*; *threatexpert.*; *trendmicro.*;
      *virusbuster.nprotect.*; *viruschief.*; *virustotal.*

 Miscellaneous Accesses internet resources:

 File details Programming language:
The malware program was written in Visual Basic.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Andrei Ilie on Wednesday, October 5, 2011
Description updated by Andrei Ilie on Thursday, October 6, 2011

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