Virus:Worm/IRCBot.52736.4
Date discovered:01/07/2007
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:52.736 Bytes
MD5 checksum:ee3ed79ffb63344b6e50458b68a7814a
VDF version:6.39.00.78

 General Method of propagation:
   • Messenger


Aliases:
   •  Kaspersky: Backdoor.Win32.IRCBot.acd
   •  F-Secure: Backdoor.Win32.IRCBot.acd
   •  Sophos: W32/IRCBot-WV
   •  Panda: W32/IrcBot.AYK.worm
   •  Eset: Win32/IRCBot.XW trojan


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops a malicious file
   • Registry modification
   • Third party control

 Files  It copies itself within an archive to the following location:
   • %WINDIR%\myalbum2007.zip



The following file is created:

– Non malicious file:
   • %HOME%\new.txt

– %SYSDIR%\sysprinters.dll Further investigation pointed out that this file is malware, too. Detected as: Worm/IRCBot.24040

 Registry The following registry keys are added:

– [HKCR\CLSID\{2E578F88-6425-4398-AB42-FF58EAA2566D}\InProcServer32]
   • @="sysprinters.dll"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
   ShellServiceObjectDelayLoad]
   • "system32"="{2E578F88-6425-4398-AB42-FF58EAA2566D}"

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

– Windows Live Messenger


To:
All entries in the contact list.


Message
The sent message looks like the following:

   • Here are my very secret pictures for you.
     Here are my pictures from my vacation
     hmm is this you on the photo ?
     Check out my pics from my workplace.
     Nice new photos of me and my friends and stuff...
     ahh look this is my greatest picture made on vacation 2007, take a look
     Check out my nice photo album. :D
     hey regarde les tof de notre bande de fous. :p
     hey c'est toi dans ces tof!!???
     hey regarde les tof, c'est moi et mes copains entrain de.... :D
     j'ai fais pour toi cet album de photos tu dois le voire :p
     stp regarde cet album de photos je lai fais specialement pour toi et mes amis...
     mes photos chaudes :D
     t'as pas encore vu ces tof???
     hey kijk eens naar mijn nieuwe foto album
     hey bekijk eens mijn nieuwe foto album
     hmm ben jij dit op de foto ?
     hey kijk ! dit is een lijst van mijn nieuwste fotos !!
     ahh kijk mijn mooiste foto album van vakantie 2007 bekijk ze eens :p
     kijk dit zijn fotos van mij werkplek! :)
     meine hei
     en Fotos ! :p
     le mie foto calde :p
     mis fotos calientes
     mi fotografias :p
     Mi amigo tom
     las fotos agradables de m :p
     mis fotos calientes
     el lol mi hermana quisiera que le enviara este


Propagation via file
It sends a file with the following name:
   • %WINDIR%\myalbum2007.zip


The received message may look like the following:


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

Server: www.free4**********.net
Port: 80
Channel: #.mafia
Nickname: new[USA][0H]%random character string%

 Injection –  It injects the following file into a process: %SYSDIR%\sysprinters.dll


– It injects a backdoor routine into a process.

    Process name:
   • EXPLORER.EXE


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

Description inserted by Alexandru Dinu on Tuesday, July 10, 2007
Description updated by Alexandru Dinu on Tuesday, July 10, 2007

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