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Virus:Worm/Dorkbot.A.144
Date discovered:31/05/2011
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:90.112 Bytes
MD5 checksum:491F3BA49C5ED170281DD6085516E262
VDF version:7.11.08.173 - Tuesday, May 31, 2011
IVDF version:7.11.08.173 - Tuesday, May 31, 2011

 General Method of propagation:
    Autorun feature
   • Email
    Messenger


Aliases:
   •  Kaspersky: Trojan.Win32.Agent.hurx
   •  TrendMicro: TROJ_AGENT.JCA
     Microsoft: Worm:Win32/Dorkbot


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:

Windows Live Messenger
 Yahoo Messenger

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

Server: **********hox.com
Port: 5101
Server password: hax0r
Channel: ngme

Server: **********e.babypin.net
Port: 5101
Server password: hax0r
Channel: ngme

Server: **********e.beecitysearch.com
Port: 5101
Server password: hax0r
Channel: ngme

Server: **********e.drwhox.com
Port: 5101
Server password: hax0r
Channel: ngme

Server: **********e.mdmads.com
Port: 5101
Server password: hax0r
Channel: ngme

Server: **********e.yourwebfind.com
Port: 5101
Server password: hax0r
Channel: ngme



 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
     Launch DDoS SYN flood
     Launch DDoS UDP flood
     disconnect from IRC server
    • Download file
    • Join IRC channel
    • Leave IRC channel
    • Perform DDoS attack
    • Restart system
     Start spreading routine

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

A logging routine is started after the following website is visited, which contains one of the following substrings in the URL:
   • alertpay
   • aol
   • bigstring
   • facebook
   • fastmail
   • fileserve
   • gmx
   • google
   • hackforums
   • login.live
   • login.yahoo
   • megaupload
   • moneybookers
   • officebanking.cl
   • paypal
   • runescape
   • screenname.aol
   • secure.logmein
   • steampowered
   • twitter.com

 It captures:
     Login information

 Injection  It injects itself as a remote thread into processes.

    All of the following processes:
   • alg.exe; chrome.exe; csrss.exe; explorer.exe; firefox.exe; flock.exe;
      ieuser.exe; iexplore.exe; msmsgs.exe; msnmsgr.exe; opera.exe;
      pidgin.exe; services.exe; smss.exe; spoolsv.exe; svchost.exe;
      winlogon.exe; wlcomm.exe; wuauclt.exe; %random process%



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


Mutex:
It creates the following Mutexes:
   • 700wke5AarroOS4R
   • t2f_ngme-Mutex

 File details 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 8월 17일 수요일
설명 업데이트 Andrei Ilie   2011년 8월 17일 수요일

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