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Virus:Worm/Dorkbot.A.383
Date discovered:20/07/2011
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
File size:212.992 Bytes
MD5 checksum:99829944E1E20A459D50FF5160031BD2
VDF version:7.11.12.21 - Wednesday, July 20, 2011
IVDF version:7.11.12.21 - Wednesday, July 20, 2011

 General Method of propagation:
   • Autorun feature
   • Email
   • Messenger


Aliases:
   •  Mcafee: W32/Autorun.worm.h
   •  Kaspersky: Worm.Win32.AutoRun.cjyc
   •  TrendMicro: Worm:Win32/Dorkbot.A


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


Side effects:
   • Third party control
   • Blocks access to security websites
   • Drops files
   • Registry modification
   • Steals information

 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:

– Yahoo Messenger

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

Server: 67.215.77.**********
Port: 49287

Server: 67.215.65.**********
Port: 49287



– This malware has the ability to collect and send information such as:
    • Current user
    • 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
    • Download file
    • Join IRC channel
    • Leave IRC channel

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

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

    All of the following processes:
   • chrome.exe
   • firefox.exe
   • flock.exe
   • ieuser.exe
   • iexplore.exe
   • msmsgs.exe
   • msnmsgr.exe
   • opera.exe
   • pidgin.exe
   • wlcomm.exe



Purpose:
Access to the following websites is effectively blocked:
   • *avast.*; *avira.*; *bitdefender.*; *bullguard.*; *clamav.*;
      *comodo.*; *emsisoft.*; *eset.*; *f-secure.*; *fortinet.*;
      *garyshood.*; *gdatasoftware.*; *heck.tc*; *iseclab.*; *jotti.*;
      *kaspersky.*; *lavasoft.*; *malwarebytes.*; *mcafee.*; *norman.*;
      *norton.*; *novirusthanks.*; *onecare.live.*; *onlinemalwarescanner.*;
      *pandasecurity.*; *precisesecurity.*; *sophos.*; *sunbeltsoftware.*;
      *symantec*; *threatexpert.*; *trendmicro.*; *virscan.*; *virus.*;
      *virusbuster.nprotect.*; *viruschief.*; *virustotal.*; *webroot.*


 Miscellaneous Accesses internet resources:
   • api.wipmania.com

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

Description inserted by Andrei Ilie on Monday, August 1, 2011
Description updated by Andrei Ilie on Wednesday, August 3, 2011

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