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Virus:TR/Gendal.kdv.316739
Date discovered:21/09/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:126.976 Bytes
MD5 checksum:0BE55123C40A8F4AF0A355528551E306
VDF version:7.11.15.03 - Wednesday, September 21, 2011
IVDF version:7.11.15.03 - Wednesday, September 21, 2011

 General Methods of propagation:
    Autorun feature
    Messenger


Aliases:
   •  Kaspersky: Backdoor.Win32.Ruskill.anu
   •  TrendMicro: WORM_DORKBOT.BEE
   •  Sophos: W32/Dorkbot-Q


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.




It tries to download some files:

The location is the following:
   • **********.185.246.40/zaberz.exe
At the time of writing this file was not online for further investigation.

The location is the following:
   • **********104.herosh.com/2011/08/29/601703956.gif
At the time of writing this file was not online for further investigation.

 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 Server:

Server: **********marketallone.com
Port: 3800
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%

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


 Miscellaneous Accesses internet resources:
   • api.wipmania.com


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

 File details Programming language:
The malware program was written in MS Visual C++.


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

설명 삽입자 Andrei Ilie   2011년 10월 24일 월요일
설명 업데이트 Andrei Ilie   2011년 10월 25일 화요일

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