WORM_KOOBFACE.IT

This worm uses social engineering methods to lure users into performing certain actions that may, directly or indirectly, cause malicious routines to be performed. Specifically, it makes use of of Facebook and a fake Youtube page.

To get a one-glance comprehensive view of the behavior of this Worm, refer to the Threat Diagram shown below.

This worm may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It deletes registry entries, causing some applications and programs to not function properly.

It propagates via social networking sites by sending malicious links to all the user's contacts. The said links point to a remote URL where a copy of the worm may be downloaded.

It runs certain commands that it receives remotely from a malicious user. Doing this puts the affected computer and information found on the computer at greater risk.

Arrival Details

This worm may be downloaded by other malware/grayware/spyware from remote sites.

It may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This worm drops the following copies of itself into the affected system:

• %Windows%\bill102.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It drops the following files:

• %Windows%\bk23567.dat - non-malicious file

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Autostart Technique

This worm adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\
Windows\CURRENTVERSION\Run
sysfbtray = %Windows%\bill102.exe

Other System Modifications

This worm adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\
Internet Explorer\Main
tp = 1000

It deletes the following registry entries:

HKEY_CURRENT_USER\AppEvents\Schemes\
Apps\Explorer\Navigation
(Default) =  

Propagation

This worm composes messages as part of its spamming routine. The messages it sends has the following details:

Y ou must see this http://www.{BLOCKED}arquitectes.com/video

It targets the following social networking site(s):

• Facebook

It propagates via social networking sites by sending malicious links to all the user's contacts. The said links point to a remote URL where a copy of the worm may be downloaded.

Backdoor Routine

This worm executes the following command(s) from a remote malicious user:

• APPLE
• BASEDOMAIN
• DOMAIN_B
• DOMAIN_C
• DOMAIN_M
• FBTARGETPERPOST
• LINK_B
• LINK_C
• LINK_MH
• LINK_S
• LINK_W
• RAZLOG
• RCAPTCHA
• SI
• SIMPLEMODE
• START
• STARTIMG
• STARTONCE
• STARTONCEIMG
• TEXT_B
• TEXT_C
• TEXT_CH
• TEXT_M
• TEXT_S
• TEXT_W
• TITLE_B
• TITLE_M
• WAIT

It connects to the following URL(s) to send and receive commands from a remote malicious user:

• {BLOCKED}0instantniches.com
• {BLOCKED}25wynr.net
• {BLOCKED}avench.com
• {BLOCKED}faheidi.kopavogur.is
• {BLOCKED}faheidi.thekking.is
• {BLOCKED}linadayswork.org
• {BLOCKED}lstateprocess.com
• {BLOCKED}icableresolutionsintl.com
• {BLOCKED}narsmari.kopavogur.is
• {BLOCKED}iandvdtime.com
• {BLOCKED}surance-selection.com
• {BLOCKED}autiteen.host
• {BLOCKED}zcontax.co.za
• {BLOCKED}aitman.net
• {BLOCKED}anderideklub.dk
• {BLOCKED}andtransfer.com
• {BLOCKED}evard-fl.com
• {BLOCKED}ightonrooms.co.uk
• {BLOCKED}isbanepropertysolutions.com.au
• {BLOCKED}usselslivestock.ca
• {BLOCKED}hillappraisal.com
• {BLOCKED}delevator.com
• {BLOCKED}ramicrestoration.co.za
• {BLOCKED}dataservices.net
• {BLOCKED}urchmousepublications.com
• {BLOCKED}edit-selection.com
• {BLOCKED}srmspos.com
• {BLOCKED}veshieldsphotography.com
• {BLOCKED}ltaboats.com
• {BLOCKED}ntistschoice-fl.com
• {BLOCKED}pannage-selection.com
• {BLOCKED}scovertotalhealth.com
• {BLOCKED}rothycooley.com
• {BLOCKED}nasales.net
• {BLOCKED}sygiftgiving.com
• {BLOCKED}enailyina.com
• {BLOCKED}essere.itties.com.tr
• {BLOCKED}pcocoa.com
• {BLOCKED}miliespil.dk
• {BLOCKED}arms.net
• {BLOCKED}fusalir.kopavogur.is
• {BLOCKED}anknelsonbuilding.com
• {BLOCKED}igologistics.nl
• {BLOCKED}y-stay.co.uk
• {BLOCKED}ldmaniac.com
• {BLOCKED}ninja.fastlearningbrain.com
• {BLOCKED}eenhealthyliving4u.netfirms.com
• {BLOCKED}eystoneofellijay.com
• {BLOCKED}inde.dk
• {BLOCKED}ypacot.com
• {BLOCKED}galleri.com
• {BLOCKED}althmann.pk
• {BLOCKED}artdesigns.com
• {BLOCKED}diawildlifetourpackages.com
• {BLOCKED}-tech.biz
• {BLOCKED}secure.com
• {BLOCKED}tya.com
• {BLOCKED}stproud2b.com
• {BLOCKED}eplan.com
• {BLOCKED}pahvoll.kopavogur.is
• {BLOCKED}udunlardoiseavenir.fr
• {BLOCKED}onardandself.com
• {BLOCKED}d-i-bevaegelse.dk
• {BLOCKED}gnumopus.dk
• {BLOCKED}hjongmuseum.com
• {BLOCKED}niacs.com
• {BLOCKED}shburnsales.com
• {BLOCKED}mbermania.com
• {BLOCKED}rce-enville.fr
• {BLOCKED}tchellelectricinc.com
• {BLOCKED}mohanty.com
• {BLOCKED}defrugt.dk
• {BLOCKED}hammedistechnologies.com
• {BLOCKED}sthaveitjewelry.com
• {BLOCKED}cleveridea.co.za
• {BLOCKED}tempweb.com
• {BLOCKED}line-doors.co.uk
• {BLOCKED}rpetpix.com
• {BLOCKED}ker-selection.fr
• {BLOCKED}tar-business-guide.net
• {BLOCKED}lphcotton.net
• {BLOCKED}gime-selection.com
• {BLOCKED}ishus.de
• {BLOCKED}cardocarvalhoco.za
• {BLOCKED}tmotours.com.tr
• {BLOCKED}upnahaed.kopavogur.is
• {BLOCKED}cklamanna.com
• {BLOCKED}omservicedesign.com.au
• {BLOCKED}chaedeli.dyndns.org
• {BLOCKED}cotton.biz
• {BLOCKED}cotton.com
• {BLOCKED}lcukunal.net
• {BLOCKED}eenalarsen.com
• {BLOCKED}nonilimited.com
• {BLOCKED}ybluephoto.com
• {BLOCKED}arahvammur.kopavogur.is
• {BLOCKED}lash-kids.com
• {BLOCKED}evenslargetreesales.com
• {BLOCKED}rictlydetail.co.uk
• {BLOCKED}iminads.info
• {BLOCKED}lephone-selection.com
• {BLOCKED}e-word-is.com
• {BLOCKED}enutritiongroup.biz
• {BLOCKED}eonlinebizplace.com
• {BLOCKED}nytanks.net
• {BLOCKED}adersquants.com.mx
• {BLOCKED}affichits247.com
• {BLOCKED}ip4x4.co.il
• {BLOCKED}oytabor.com
• {BLOCKED}rk-ie.org
• {BLOCKED}dercoversquilting.com
• {BLOCKED}pfashiongroup.com
• {BLOCKED}vicohen.com
• {BLOCKED}iture-selection.com
• {BLOCKED}yages-selection.com
• {BLOCKED}lovetweet.com
• {BLOCKED}yviral.com
• {BLOCKED}-egypt.com
• www.{BLOCKED}gypten-mit-stefan.de
• www.{BLOCKED}faheidi.is
• www.{BLOCKED}stakigroup.com
• www.{BLOCKED}nmmoviesman.com
• www.{BLOCKED}municat-de-presa.ro
• www.{BLOCKED}inzahnarzt.com
• www.{BLOCKED}o-lesbians.com
• www.{BLOCKED}o-pussy.com
• www.{BLOCKED}m.it
• www.{BLOCKED}otic-food.ch
• www.{BLOCKED}stlearningbrain.com
• www.{BLOCKED}stpitchequipment.com
• www.{BLOCKED}rienhaus-muehlner.de
• www.{BLOCKED}vestar.ch
• www.{BLOCKED}oggnitzer-werbeatelier.de
• www.{BLOCKED}rangi.com
• www.{BLOCKED}rault-automobiles.Fr
• www.{BLOCKED}s-email.co.uk
• www.{BLOCKED}0-trinitains.com
• www.{BLOCKED}llabyah.com
• www.{BLOCKED}chausleidenschaft.de
• www.{BLOCKED}arningomaha.com
• www.{BLOCKED}breriabibliothe.it
• www.{BLOCKED}ssage-tom.com
• www.{BLOCKED}utiqa.com.sg
• www.{BLOCKED}eofakindsxm.com
• www.{BLOCKED}rfect-center.org
• www.{BLOCKED}unkafrique.net
• www.{BLOCKED}sd1pc.org
• www.{BLOCKED}eerasfolk-community.de
• www.{BLOCKED}-speedracing.at
• www.{BLOCKED}-speedracing.com
• www.{BLOCKED}senboernehave.dk
• www.{BLOCKED}gnyourweb.com
• www.{BLOCKED}monelliafi.it
• www.{BLOCKED}rgentedib
• www.{BLOCKED}bdesign.com.sg
• www.{BLOCKED}alasso-selection.com
• www.{BLOCKED}msmurf.com
• www.{BLOCKED}llesina.tv
• www.{BLOCKED}atherserve.net
• www.{BLOCKED}tone.ch
• {BLOCKED}urprofit.brevard-fl.com
• {BLOCKED}habit.com

Download Routine

This worm accesses the following websites to download files:

• http:\\{BLOCKED}ybluephoto.com/.sys/?getexe=go.exe - detected as TROJ_AGENTT.EA
• http:\\{BLOCKED}ybluephoto.com/.sys/?getexe=v2webserver.exe - detected as Mal_Koob-2
• http:\\{BLOCKED}ybluephoto.com/.sys/?getexe=v2googlecheck.exe - detected as Mal_Koob-8
• http:\\{BLOCKED}ybluephoto.com/.sys/?getexe=v2captcha.exe - detected as WORM_KOOBFCE.SMM

Other Details

Based on analysis of the codes, it has the following capabilities:

• Connects to social networking websites based on cookies it monitors
• Navigates to affected users’ FRIENDS list in the monitored social networking Web site
• Sends an HTTP POST request to the server once a friend has been located. As a reply, the server sends data which is actually the message to be sent to user's contacts.
• Composes a new message containing the data from the server and sends it to the user's friend. The new message contains a link where a copy of this worm can be downloaded.
• Performs routines such as reset itself, kill itself, exit its process, delete itself, and update itself

It connects to the following URL(s) to check for an Internet connection:

• http://www.{BLOCKED}.com