Threat Description

Kickin

Details

Aliases: Kickin, I-Worm.Cydog.c, W32/Cydog.D, W32/Kickin@MM, Cydog.D, W32/Kickin.A@mm
Category: Malware
Type:
Platform: W32

Summary



F-Secure received the first submission of Kickin worm on 7th of May 2003. However, the worm appeared in the wild a few days earlier - we received its notification messages before we got the actual sample.

This worm is 109056 bytes long and it's packed with UPX file compressor. Kickin is very similar to Cydog worm variants but it is rewritten in Visual C language. Kickin can spread via e-mail, IRC and peer-to-peer (P2P) networks Kazaa, Edonkey, Bearshare, Morpheus.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Infecting a system

When run, the worm copites itself to Windows directory as CYBERWOLF.EXE with hidden and system attributes. Additionally the worm copies itself to Windows System directory with the following names:

 mapi32.drv
 format.com
 SARS-Guide.scr
 MsnMsgs.exe
 Setup.exe
 Virtual Joke.scr
 Saddam-the real pics.scr
 Christina Aguilera-The most beautiful girl on earth.scr
 Soccer Database.exe
 OutWar Demo.exe
 Love.scr
 Last Summer.scr
 Hotmail Hacker.exe
 FixSql.com
 Q30215HOTFIX.pif
 Api Hooking-Tutorial.exe
 Kernel32.exe
 Magical-Screensaver.scr
 
 

The worm sets hidden and system attribute for Kernel32.exe file. It modifies the default EXE file startup key so that Kernel32.exe file is always started when a user runs an EXE file:

 [HKCR\exefile\shell\open\command]
 @ =  "%winsysdir%\Kernel32.exe"%1"%*""


The worm also creates two startup keys for its files in System Registry:

 [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
 "CyberWolf" = "%windir%\CyberWolf.exe"
 "Windows Kernel" = "%winsysdir%\Kernel32.exe"


where %windir% represents Windows directory and %winsysdir% represents Windows System directory. This is done to make those two worm files start during every Windows session.

The worm modifies several Registry keys. These modifications make Windows hide file extensions and avoid showing files with hidden and system attributes.

Spreading in e-mail

The worm primarily spreads itself in infected e-mail messages. It collects e-mail addresses from Yahoo Messenger, MSN and .NET Messenger, ICQ, Windows Address Book and from HTML and EML files it can find on a hard disk.

Kickin worm has a list of SMTP servers that it tries to connect if a user's SMTP server is not available. It can send itself in messages with different subjects and bodies. Worm's attachment names are also different. Infected messages sent by the worm look as follows:

From:

 Lovergirl@yahoo.com 
 Subject:

 Fwd:Fwd:Fwd:Watch out for SARS!
 
 

Body:

 ---ORIGINAL MESSAGE BODY---
 FROM:<sk8_or_die66@yahoo.com>
 DATE:Tuesday, May 06, 2003 11:37:31
 TO:<sk8er_4life13@yahoo.com>
 SUBJECT:Fwd:Watch out for SARS!
 
 FROM:<sk8er_4life13@yahoo.com.com>
 DATE:Tuesday, May 06, 2003 11:37:31
 TO:<mindy_xx@yahoo.com>
 SUBJECT:Fwd:FwdWatch out for SARS!
 
 FROM:<mindy_xx@yahoo.com.com>
 DATE:Tuesday, May 06, 2003 11:37:31
 TO:<Lovergirl@yahoo.com>
 SUBJECT:Fwd:Fwd:Fwd:Watch out for SARS!
 
 SARS aka Severe Acute Respiration Syndrome is infecting more and
 more people every day Soon it will get to USA,Europe,Asia,Africa
 and Australia if we don't do something
 
 Thats why we started this chain letter with a single attachment
 
 Our mission is to make all people aware of the disease and to
 give them a handy guide on how to protect themselves The
 attachment(SARS-Guide) is a guide (like the name says;)) with
 instructions for avoiding infection and what to do when infected
 
 Ofcourse we cannot send this Guide to all people,thats why the
 WHO(World Health Organisation) has made a deal with WISI(World
 Internet Statistic Institute):For mail FORWARD of this email
 WITH the Guide,0.50US$ will be transfered to the WHO bank
 account They will use this money to make a vaccin for the SARS
 Virus,and thus help mankind

 If you want to participate to this project,and thus help man
 kind,you should FORWARD this email to at least 1 person with
 this Guide Attached Thas all you'll have to do
 
 Do,'t forget!Every FORWARD is 0.50US$ more for the vaccin,a
 vaccin is very expensive,so forward it if you want to
 participate in helping mankind!
 
 For more information contact:
 
 Dick Thompson - Communication Officer
 Communicable Disease Prevention, Control and Eradication WHO, Geneva
 Telephone: (+41 22) 791 26 84
 Email: thompsond@who.int
 
 Attachment:

 SARS-Guide.scr

Please note that there is a real Mr. Dick Thompson working for WHO. Obviously he has nothing to do with this virus.

From:

 Webmaster@planet-source-code.com
 
 Subject: Api Hooking Tutorial... 

Body:

 Did you wanted to learn how to api hook?
Here your chance!This tutorial explains all the basics AND moderate Api Hookings
 Starting by hooking Registry Keys,Till hiding files from view in Windows Explorer
 After reading this tut you can even start Windows RootKit
 Programming but ofcourse thats up to you to decide...
The Tutorial attached in this e-mail is for privat use only and
 may never be distributed under any curcumstances
Provided to you by: Webmaster<Webmaster@planet-source-code.com>
 and www.planet-source-code.com
Attachment:

 Api Hooking-Tutorial.exe
 
 
 From:Support@microsoft.com
 Subject:Windows Hotfix!
 Body:

 Attached is the HotFix for several bugs in Windows Operating Systems.
The following Windows versions are vulnerable:
 Windows Xp home and Pro edition (with/without SP1)
 Windows ME,2000 and NT Home and Pro Edition(With/without SP)
 Windows 98 Home,Pro and Special Edition(With/without SP)
 The following Windows Operating Systems are not vulnerable:
 Windows 95(All editions With or Without Sp
 Microsoft IIS(all versions)
If your Operating System is one of the vulnerable systems listed
 above then Microsoft Corp. recommends you to install this HotFix
 If you for some reason didn't install this hotfix,then your pc
 will be vulnerable to this bugs allowing an attacker to Remote
 Control your pc,or beeing infected with the infamous SqlSlammer.
 Because this is an critical bug,Microsoft Corp. has send this
 HotFix to all of his customors who use one of the OS's.
For more information about this bug or about Microsoft
 Corp.,please visit www.microsoft.com
  Presented to you by:Microsoft HelpDesk<Support@microsoftcom>
  
  Attachment: Q30215HOTFIX.pif

 From: SecurityResponse@symantec.com
 Subject: Warning from Symantec.com
 Body:

 5/4/2003 A NEW INTERNET WORM HAS BEEN FOUND IN THE WILD
A new very dangerous internet worm has been found in the
 wild.This worms goes under the name W32.SqlSlammer.C@mm and has
 the possibility to spread by several ports on your
 pc(139,25,445,446,10252).
 It will infect you without your knowlegde because it uses the
 Sql Buffer Overflow exploit.Because of this its very hard for Av
 companies and Microsoft to contain this thread.Thats why we
 decided to protect our customors by sending then SqlFix and thus
 protecting them from infection.
 After installation the fix will determine if the SqlSlammer.C
 has infected your pc and clean it.If it didn't infect it then it
 will make sure it will never infect you by closing the bug in
 your OS.
 Simply run the attached fix and wait for the dialog to
 prompt,select the <Full Clean> feature and wait till its
 finished.
 
 Sincerely,
 Symantec Security Response Team
 Symantec Corporation
 Attachment: FixSql.com
 
 From: Admin@hackers.com
 Subject: u wanted to hack?
 Body:
 hi there,so you wanted to hack your friends hotmail account
 huh,well use this xss-exploit tool to find his password within 3 minutes!!
 Simply open it and enter your victims email ID and select <hack>
 This will also work on Yahoo and Icq accounts
 Admin@hackers.com


 From: Lovergirl963@hotmail.com
 Subject: Do you remember last summer?
 Body:

 hi
 Do you remember we met last summer?
 We became very good friends at the end huh!
 Well i looked a bit over internet and i encountered your
 Email,so i thought why not send him the pics from last summer
 I've attached them in this email,there in ScreenSaver format,pls
 reply to me if you liked them
 See you soon again xxx
 Love ya...
 
 Attachment: Last Summer.scr
 
 From:Lovergirl33@hotmail.com
 Subject: Fwd:Fwd:Fwd:Sit back and be surprised...
 Body:
 
 ORIGINAL MESSAGE BODY:
FROM:<Admin@screensavers.com>
 DATE:Tuesday, May 06, 2003 13:37:31
 TO:<Lovergirl33@hotmail.com>
 SUBJECT:Fwd:Fwd:Sit back and be surprised...
Magic in CyberSpace,its almost unbelievable!
1)Pick 3 numbers and write them down on a paper.
 2)Add one of the following values to the 3
 numbers:Love,Friendship and Sex.Write these values next to the
 number
 3)Pick 1 additional number and say it out loud 5 times
 4)Now the sticky part:Choose 3 names of girls/boys who you like
 and write them below on that paper.
 5)Now open the Magical screensaver i attached,wrap the paper in
 your left hand and close your eyes until you here the beep.
 6)Open your eyes again and look at the screen.What the
 screensaver displayed will be personal,so you'll have to be
 alone in your room.Everything the screensaver displays will come
 tru within the next 2 months,Only the Sex part will come tru
 when your above 16.
You don't have to forward this email but then your friends won't
 get the chance to make their dreams come tru,So if you want your
 friends to be happe,simply mail them the magic...
Be aware!No cheating allowed,Once you have written those names
 and values on your paper you cannot chance them!!! 

Attachment:Magical-Screensaver.scr

 From:Admin@screensavers.com
 Subject: The Magical screensaver
 Body:

 Check out this magic screensaver.Its pure magic!!!
 Follow these steps for the magic:
 1)Pick 3 numbers and write them down on a paper.
 2)Add one of the following values to the 3
 numbers:Love,Friendship and Sex.Write these values next to the
 number
 3)Pick 1 additional number and say it out loud 5 times
 4)Now the sticky part:Choose 3 names of girls/boys who you like
 and write them below on that paper.
 5)Now open the Magical screensaver i attached,wrap the paper in
 your left hand and close your eyes until you here the beep.
 6)Open your eyes again and look at the screen.What the
 screensaver displayed will be personal,so you'll have to be
 alone in your room.Everything the screensaver displays will come
 tru within the next 2 months,Only the Sex part will come tru
 when your above 16.
Presented by Admin@screensavers.com

 Attachment: Magical-Screensaver.scr
 From: Webmaster@Loveforlife.com
 Subject:Feel the reason why we fall in love...
 Body:

 It takes One minute to find someone special
 One hour to like someone
 1 Day to fall in love with someone
 But it takes a lifetime to forget someone.
If you have ever been in love then you'll know about what i am talking.
 If you wanne have that same old feeling then open the
 lovescreensaver and realise why we fall in love all the time...
 
 Attachment:Love.scr
 From: Webmaster@Outwar.comSubject:
 Outwar is proud to present you:Outwar InterActive
 
 Body:

 After beeing succesfull for quit some years now and having more
 then 20000 clients,it was time for something new.
 Thats why we decided to take our OutWar into the game market and
 developed OurWar InterActive
 This game will be in shops late summer and will cost about 36$.
 It will be avaible across the Usa,Europe,Australia and Asia.
 Our release for Africa is scheduled early 2004.
Because this will mean a lot of waiting,we developed the first
 Official OutWar Int. Demo!
 The attached file contains Installation Packet for the downloader.
 Install it and download the game from our Private FTP
 servers,and then enjoy it on your home pc!.
Sincerely yours
 Webmaster@outwar.com
 
 Attachment:

 OutWar Demo.exe
From:

 Soccerfan@yahoo.com
Subject:

 Fwd:Fwd:Fwd:Soccer...
Body:

 Ever wanted to see the best goals,the most beautiful freekicks
 etc.with just 2 clicks with your mouse?
 Ever wanted to acces the largest Soccer Database on the internet
 where all goals from more then 25 international competitions
 from the past 15 years are stored?
 Here is your chance,this program has instant acces it,so you can
 enjoy how Diego Maradonna scored <with the hand of god>,or how
 Johan Cruyff curled that ball into the goal...Enjoy!
The database contains goals from countries
 like:Spain,Italy,France,Germany,England,Belgium,The
 Netherlands,Sweden,Finland and much more
Also forward this to all football fans you know so they can
 enjoy this to.
Attachment:

 Soccer Database.exe
From:

 Webmaster@beautifulgirls
Subject:

 Christina Aguilera:The most beautiful girl on earth
Body:

 Don't you think Christina Aguilera is the most beautiful girl on earth?
 She is soo nice!!!
 That clip <Dirrty> was amazing...
 If you wanne see some hidden pics of that videoclip then check
 out this screensaver
 Its nice...Very nice,if you get what i mean ;)
Webmaster@beautifulgirls.com
Attachment:

 Christina Aguilera-The most beautiful girl on earth.scr
From:

 webmaster@screensavers.com
Subject:

 Saddam alive and kickin'
Body:

 The whole world wants to know it,is saddam a live,or death?
 Well somedays a go the britisch took secret spy cam pics,and
 luckely someone has uploaded this pics to the internet,and now
 their avaible!
 You won't believe what you see!its amazing!!!The spy cam was
 hidden inside a tower in Bagdad and it took pics from saddam and
 his sons,they our 250m beneath the ground!
 Check out the pics i attached,you won't believe what you see!
Attachment:

 Saddam-the real pics.scr
From:

 Admin@jokes.com
Subject:

 The Virtual Joke...
Body:

 Have you seen it yet?
 You should because its soooooo funny,i wish the real jokes where that funny :)
 Check out the attached screensaver and enjoy the pleasure of laughing...
Attachment:

 Virtual Joke.scr
From:

 flipbabe@hotmail.com
Subject:

 Fwd:Fwd:Whats really happening in bagdad
Body:

 ORIGINAL MESSAGE BODY:
FROM:<webmaster@screensavers.com>
 DATE:Tuesday, May 06, 2003 13:37:31
 TO:<flipbabe@hotmail.com>
 SUBJECT:Fwd:Whats really happening in bagdad
Someone of the britisch army has made some Secret Spy Cam
 pics,and uploaded it to the internet!!
 The pics show you exactly whats reall happened in Irak!Its
 really not what you've seen on tv!
 Check out the attached file and forward this to as much friends
 so that they can all see what has really happened in Irak.
FlipBabe xxx
Attachment:

 Saddam-the real pics.scr
From:

 mailinglist@Msn.com
Subject:

 Get the new Msn 5.1!
Body:

 Tired of the little nicknames in Msn,tired of all the limits?
 Well we've got news for you,Msn 5.1 is the newest and best msn messenger ever!
 It allows nicknames up to 500 characters and has many new
 functions who will make your cyberlife easyier and better!
 Msn Messenger 5.1 is avaible for following Operating Systems:
 Windows Xp
 Windows ME and 2000
 Windows 98 and NT
 Is not avaible for:Windows 95
This version of msn messenger supports also Api's in Windows Xp
 so you can make your own addons.
 To download Msn Messenger 5.1 install the attached Root Setup.
WARNING:MSN MESSENGER IS NOT AVAIBLE FOR DOWNLOAD AT OUR WEBSITE
 DUE TO JURIDICAL RESTRICTIONS,IF YOU WANT IT YOU'LL HAVE TO
 INSTALL THE ROOT SETUP.
 If you don't want to install it then you'll have to wait for
 another 5 weeks because of the juridical restricions.
 Please do not forward this email.Every user who has Msn
 Messenger installed will receive this email sooner or later,so
 its up to them to decide to use the new version of not
Sincerely yours:
 The Msn Messenger Team
 The Hotmail Team
 
Attachment: MsnMsgs.exe
 
From: nice_girl21@hotmail.com
Subject: Fwd:How to protect yourself against SARS
Body: 

ORIGINAL MESSAGE BODY:
FROM:<mailinglist@healthcare.com>
 DATE:Tuesday, May 06, 2003 11:37:31
 TO:<nice_girl21@hotmail.com>
 SUBJECT:Fwd:How to protect yourself against SARS
SARS aka. Severe Acute Respiratory Syndrome is a worldwide health threat.
 It was first discovered in China
 But now,it has become a very big thread to all people in this world
If no vaccin is found,soon more then 500.000 people will be infected with it
 This vaccin is not yet made,so within this time the ONLY
 protection humans have is prevention of infection
Thats why we of HealthCare launched a project in which we will
 send newsletters with information about SARS and with prevention
 rules.
Symptoms:High Fever(>38-C) AND one or more respiratory symptoms
 including cough, shortness of breath, difficulty breathing Also
 be aware of the following:close contact with a person who has
 been diagnosed with SARS AND a recent history of travel to areas
 reporting cases of SARS In addition to fever and respiratory
 symptoms, SARS may be associated with other symptoms including:
 headache, muscular stiffness, loss of appetite, malaise,
 confusion, rash, and diarrhea.
Until more is known about the cause of these outbreaks, WHO
 (World Health Organization) recommends that all people read the
 attached instructions of howto prevent beeing infected with SARS
 and what to do when infection has occurred
For more information contact:
Dick Thompson - Communication Officer
 Communicable Disease Prevention, Control and Eradication WHO, Geneva
 Telephone: (+41 22) 791 26 84
 Email: thompsond@who.int
 
 Attachment: SARS-Guide.scr

Spreading in P2P (peer-to-peer) networks

The worm has the ability to spread in peer-to-peer networks. It tries to locate shared folders of Kazaa, Edonkey, Bearshare and Morpheus file sharing clients and copies itself there with the following names:

Virus Creation ToolKit-VX v7.1_create virii with this tool,Klez.H and Sircam has been created with version 6.exe WebAttack-DoS Tool.exe FTP Cracker-2003(Crack the password of ANY FTP server with this tool!).exe Yahoo Remote Password Cracker Deluxe 2003.exe AIM Remote Password Cracker.exe Hotmail Exploiter 2003.exe XNuker 2003.exe Ultimate HackProg.exe Msn Messenger Remote Password Cracker 2003.exe Netbios hacker.exe Chaos Ip Spoof 2003.exe People who download and run these files become infected with the worm.

Spreading in IRC networks

The worm spreads via IRC by replacing the SCRIPT.INI file of IRC client and creates its own script that sends the following messages to users joining a channel where an infected user is staying:

&lt;user_nick&gt; hi,im CyberWolf,15 and from austria and u? &lt;user_nick&gt; check out this crazy screensaver!its magic!!! Then the script sends the worm's file with the 'Magical-Screensaver.scr' name to a user with the nickname &lt;user_nick&gt;. When a user runs that file, he/she becomes infected with the worm.

Payload

The worm sends notification messages to anti-virus companies. Such messages look like that:

From:

 twistmaster13@hotmail.com
Subject:

 Hi,i'm 100% sure i'm infected!
Body:

 mmm...if you received this mail,then someone has been infected
 with W32.CyberWolf.B@mm => a new massmailer worm.
 For every infection this worm does,you'll receive an email like this.
It has never been my intention to cause your mailbox any harm,nor mailbomb it.
 Its just so that you can have a quite accurate view on how many
 infections..because most of the times,Av companies are miles
 away from the real number...
 
 

F-Secure has been receiving quite a large amount of such e-mails, sent from infected machines in China, Belgium and the Netherlands.

Depending on system time the worm can create text files in Windows directory: CyberWolf.txt or Windows.lOg. These files contain text messages from the author of the worm.

Depending on system time the worm can open Internet browser and go to the following sites:

 www.brain-hack.com
 www.indiansnakes.cjb.net
 www.christinaaguilera
 www.catholicninjas.org/superfuntime/
 
 

The worm kills the following processes belonging to anti-virus and security software:

 NETSERVICES
 COMMAND
 SYSHELP
 RAVMOND
 WINRPC
 WINHELP
 WINGATE
 NPROTECT
 CLEANER
 WINDRIVER
 TASKMGR
 MSCONFIG
 REGEDIT
 ANTI-TROJAN
 BLACKICE
 ZONEALARM
 LOCKDOWNADVANCED
 NVC95
 FP-WIN
 IOMON98
 PCCWIN98
 F-PROT
 F-STOPW
 IAMSERV.EXE
 NAVWNT
 NAVRUNR
 NAVLU32
 NAVAPSVC
 VSMON.EXE
 SYMPROXYSVC
 RESCUE32
 NISSERV
 VSECOMR
 VETTRAY
 TDS2-NT
 CCAPP.EXE
 SCAN32
 PCFWALLICON
 NSCHED32
 SPHINX.EXE
 FRW.EXE
 MCAFEE
 ATRACK
 PVIEW.EXE
 LUCOMSERVER
 LUALL.EXE
 NMAIN.EXE
 NAVW32
 NAVAPW32
 VSSTAT
 VSHWIN32
 AVSYNMGR
 AVCONSOL
 WEBTRAP
 POP3TRAP
 PCCMAIN
 PCCIOMON
 ESAFE.EXE
 AVPM.EXE
 AVPCC.EXE
 AMON.EXE
 ALERTSVC
 ZAPRO.EXE
 AVP32
 LOCKDOWN2000
 AVP.EXE
 CFINET32
 CFINET
 ICMON
 SAFEWEB
 WEBSCANX
 IAMAPP


The worm also does's allow the programs with the following names to run:

 Norton AntiVirus
 LiveUpdate
 System Configuration Utility
 Process Viewer
 Registry-Editor
 Windows Task Manager


Detection


F-Secure Anti-Virus detects Kickin worm with the updates published on May 7th, 2003:
Database: 2003-05-07_03



Description Created: Alexey Podrezov, Katrin Tocheva, Mikko Hypponen; F-Secure Corp.; May 7th, 2003


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