Threat Encyclopedia

WORM_KOOBFACE.IT

Publish date: February 23, 2010

ANALYSIS BY

adel


PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:

  • Threat Type:Worm

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW

Infection Channel:

Propagates via social networking sites


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.

TECHNICAL DETAILS

File Size:

62,464 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

20 Feb 2010

Payload:

Downloads files

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

SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

6.864.09

FIRST VSAPI PATTERN DATE:

21 Feb 2010

VSAPI OPR PATTERN File:

6.955.00

VSAPI OPR PATTERN Date:

27 Mar 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by WORM_KOOBFACE.IT

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.


  • In HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Internet Explorer\Main
    • tp = 1000
  • In HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Run
    • sysfbtray = %Windows%\bill102.exe

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.


  • In HKEY_CLASSES_ROOT\Mime\Database\Content Type
    • application/xhtml+xml

Step 5

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Windows%\bk23567.dat

Step 6

Scan your computer with your Trend Micro product to delete files detected as WORM_KOOBFACE.IT. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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