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Date discovered:19/08/2011
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:266.240 Bytes
MD5 checksum:38771EBCABCBE8BEA7D00D2E8232BAC7
VDF version:
IVDF version:

 General Methods of propagation:
   • Autorun feature
   • Messenger

   •  Kaspersky: Trojan.Win32.VBKrypt.fbnw
   •  Microsoft: Worm:Win32/Dorkbot.I
   •  AhnLab: Trojan/Win32.VBKrypt

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

Side effects:
   • Drops files
   • Registry modification

 Files It copies itself to the following location:
   • %APPDATA%\%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%"="%APPDATA%\%random character string%.exe"

 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 Servers:

Server: **********
Port: 4042
Nickname: %random character string%

Server: **********
Port: 4042
Nickname: %random character string%

– This malware has the ability to collect and send information such as:
    • Username
    • 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

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

    Process name:
   • %random process%

 Miscellaneous Anti debugging
Checks for debugger or virtual machine using time related techniques.

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

Descrição enviada por Andrei Ilie em quarta-feira, 26 de outubro de 2011
Descrição atualizada por Andrei Ilie em segunda-feira, 31 de outubro de 2011

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