WORM_CRIDEX.AR

This worm arrives by connecting affected removable drives to a system. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It is injected into all running processes to remain memory resident.

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

It connects to a website to send and receive information.

It deletes the initially executed copy of itself.

Arrival Details

This worm arrives by connecting affected removable drives to a system.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

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

• %Application Data%\KB{random numbers}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It drops the following files:

• %User Temp%\POS6.tmp.BAT

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It creates the following folders:

• %Application Data%\{random folder}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It is injected into all running processes to remain memory resident.

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• Local\E{random numbers}
• Local\M{random numbers}
• Local\I{random numbers}
• Local\R{random numbers}
• Local\F{random numbers}
• Local\B{random numbers}
• Local\S{random numbers}

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
KB{random numbers}.exe = ""%Application Data%\KB{random numbers}.exe""

Other System Modifications

This worm adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = 0

HKEY_CURRENT_USER\Software\Microsoft\
Windows Media Center\{random1}
{default} = {hex numbers}

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows Media Center

HKEY_CURRENT_USER\Software\Microsoft\
Windows Media Center\{random}

HKEY_CURRENT_USER\Software\Microsoft\
Windows Media Center\{random1}

Propagation

This worm creates the following folders in all removable drives:

• {random folder}

It drops the following copy(ies) of itself in all removable drives:

• {random folder}\{random file name}.exe

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

[autorun]
open={random folder}\{random file name}.exe
shell\Open\Command={random folder}\{random file name}.exe
shell\Open\Default=1
shell\Explore\Command={random folder}\{random file name}.exe
shell\Autoplay\command={random folder}\{random file name}.exe

Backdoor Routine

This worm connects to the following websites to send and receive information:

• https://{BLOCKED}.com/T1/
• https://{BLOCKED}.com/T1/
• https://{BLOCKED}.com/T1/
• https://{BLOCKED}.net/T1/

Information Theft

This worm monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar and/or title bar:

• *.com/K1inessaccess.citiveaccess.citizen
• *.onlineaccess
• */Authenticatbank.com*
• */Authoint.usbank.com*
• */CASHplusineaccess1.com*
• */CLKCCM/*treasury.pncbank*
• */Common/Sice.wellsfargo.co
• */Common/Signnlineserv/CM*
• */Common/Sit*
• */Common/net*
• */IBWS/*
• */ebc_ebc1*express.53.com*
• */ebc_ebc1961press.53.com/expcom*
• */ibsolbb/*
• */inets/*
• */sbuser/*
• */wirenternet-ebankingm*
• *CLKCCM*
• *access.rbsm.cotiabank.com*
• *anb.portalva
• *b*business-eb.ibaeaf*
• *b*servlet/teller*urentry.calbankt
• *ba*efirstbank.com*
• *banking.ca/*
• *banking.calapitalonebank.cocom/K1/*\
• *banking.calb
• *banking.calbaitalonebank.com*m/K1/*
• *banking.firservices.com*
• *banking.firstteom*
• *banking.tbank.com*
• *bankonline.com*
• *bankonline.sbo*
• *banwernet.capitalon
• *bc_ebc1961/*
• *blilk.com*
• *bmibank.com*
• *bmoharri
• *bmoharrispbnycash.bankofnyn.com*
• *bmomutualfu
• *bmomutualfun
• *bmomutualfundsbusinessbanking./logon*
• *bnycash.bankoflon.com*
• *bnycasr.bnymellon.com*on*
• *bnycger.bnymellon.cognon*
• *bob.sovere
• *bolb-eashproonline.bankohewest.com*
• *bolb-east.roonline.bankofawest.com*
• *boveda.banam
• *btowernet.capital
• *busibbankingforbusinxpress.com*
• *busieasurydirect.tdbxpress/logon.act
• *busineibbpowerlink.com
• *businesing.calbanktrustbank.com*
• *business.nfundsxpress.com*
• *businessbankiibc.com*
• *businessbankinom/logon*
• *businessclassoshanalyzer.com*
• *businesse.fundsxpress.co
• *businessmg.calbanktrust.cnk.com*
• *businessonlierlink.com*
• *businesurydirect.tdbanress/logon.actio
• *buwebbankingforbushexpress.com*
• *bxs.spx*
• *cashanalyzecom*
• *cashanalyzer.m*
• *cencorpcu.com*
• *cfgbusincial*
• *cib.bankof/auth*
• *cib.bankom/auth*
• *cibbbt.com/auth*
• *citibank.citigroizensbank.com*
• *cl.bbt.com/auth*
• *cmserver*
• *comerica.com/bks.com/olb*
• *commerci*commercialservifxmanager.bankofirect.com*
• *commercial.w
• *commercial.wa
• *commercial.wach
• *commercialser*ifxmanager.banksdirect.com*
• *corpACH*
• *cu.com*s.cunet.org*
• *cu.conks.cunet.org*
• *cuylinks.cunet.org
• *e-moneyger.corentrycorp.amegy
• *easyweba.banamex.com.mxIBWS/*
• *easywebcpst.associatedbanedbank.com*
• *easyweda.banamex.com.*/IBWS/*
• *ebanking-serves.com*
• *ebanking-servic.com*
• *ebc_ebc1961*
• *ebc_ervices.com*
• *ecas.arvest.com*
• *ecash.rvest.com*
• *efirstbank.com*
• *enlobal1.onlineban
• *entebal1.onlinebank.*/sbuser/*
• *enteral1.onlinebank.c/sbuser/*
• *enternetb
• *enternetban*northerntrust.c
• *epd.uscenasp*
• *epd.uscentrp*
• *epd.usnet*
• *express.53itizens.com*
• *express.tcitizens.com*
• *eyger.com*
• *flickr.com*
• *globalinkreet.com*
• *globalistreet.com*
• *globet.net*
• *glrnet.net*
• *hb.exe* aspx*
• *hbcash.ex
• *hbcash.exe*
• *hillsbank.co*
• *hillsbank.com*
• *hillsbankbb/*
• *hillsonalcity.com*
• *hiltionalcity.com*
• *homebank.n
• *hsbc*
• *ibbpowan.com*
• *ibbpower.com*
• *ibbpowerlink.business.jsp*
• *ibbpowerlink.cosiness.jsp*
• *iconnect.com*
• *inetba
• *inetbank
• *mbachexmbersunited.org*surer.com*
• *mbachexpress.nited.org*
• *metrobankd
• *metrobankdir
• *metrobankdir*
• *metrobankdom*
• *mybanknshinestatefeder
• *mybasunshinestatefed
• *mystreabank.com*
• *nashvillecint.usbank.com*
• *nashvillecitt.usbank.com*
• *nfgbusinessonlinakecitybank.webc
• *nline.chase.com/*
• *nortbanker.cc*
• *northbnker.cc*
• *northeOn/*
• *northerntrust
• *nsbank.com/
• *nsbank.com//b
• *ntrs.com*
• *onlinebanking.bonline.tdbank.coank.com*
• *onlinebausinessonline.tdapitalbank.com*
• *onlineserv/-banking*
• *orporate.org*
• *otm.sun
• *passport.tvillecitizensban.com*
• *paylinks.cune
• *paypalaspx*
• *phcp/sank.com*
• *phcp/senk.com*
• *phcp/serv.com*
• *pub/htmk.citigroup.com*nk.com*
• *pub/html*citigroup.com*
• *rbs.com/wps/andyspringbank.c/mp*
• *rbs.com/wps/podyspringbank.comp*
• *royalbaaccess.rbsm.com/abank.com*
• *royalbankcess.rbsm.com/loank.com*
• *s.usbank.com*
• *sandyspayment.com/mp*
• *sandytpayment.com/mp*
• *secure
• *secure.bancbank.wesbanco.co
• *secure.banebank.wesbanco.m*
• *secure.fundsxpolb*
• *secure2.umb.co*libertymutualbuioonline.metavanom*
• *secure7.access1.com*
• *secure7.oncess1.com*
• *securebaalhartfederal.co
• *securebankhartfederal.com*
• *securentry*
• *sial.wachovia.comhcp/servlet*
• *solusinessonline.comconstitutioncorp
• *solutioessonline.com*
• *solutionssonline.com*
• *sso.towernet.capital.com/consultnc*
• *sso.uboc*
• *sttennessee*
• *svbc.banksterling.cocom*
• *svbconnect.crling.com*
• *svng.banksterling.k.com*
• *tatedbank.com*
• *telepc.*
• *top.capital.com*
• *top.capitst.com*
• *torateAccounts*
• *treasessonline.huntinm*
• *treasury.portal/*
• *treasury.wcom*
• *treasurydir3.com/express/lo.com*
• *treasuryk.com*
• *treateAccounts*
• *treinessonline.huntcom*
• *trem/wps/portal/cb/bank.com*
• *trusessclassonline.ccey-ebanking.comm*
• *trustmsclassonline.comy-ebanking.com*
• *twitter.
• *unitedban
• *unitedbankw
• *unxe*
• *usaa.com*
• *usinessclassonlinalyzer.com*
• *vectrabank.ingbankconnect.cktx.com/cgi-bin/inkweb.com*
• *vectrabanpringbankconnectanktx.com/cgi-biylinkweb.com*
• *webbankin
• *wellsoffiualfunds.com*
• *wellsofutualfunds.com*
• *wellsomutualfunds.comnessbanking.cibc*
• *westfieldcure-eccu.org*
• *westfiesecure-eccu.org*
• *wsclassonline.comr.com*
• *y.statestreet.cotfolio*
• .1stsource.com*
• .com/K1/*essaccess.citibaaccess.citizensb
• .fsbnm.com*
• .fsbperkasie.com
• access.ine.scotiabank.cank.com*
• anking.firsttenn*
• bank.com*
• banking.cibc.com
• banking.com*
• bcashmgmt.com*
• bk.inetbanker.co
• blilk.comom*
• bperkasie.com*
• businessonline.hnager.com*
• capitalonebank.cultnc*
• centerprisebank.
• comerica.com/bus.com/olb*
• corp.amegybank.cnlineserv/CM*
• direct.com*
• easury.pncbank.c
• ebanking.com*
• encorpcu.com*
• er.usbank.com*
• erkasie.com*
• essclassonline.czer.com*
• etrobankdirect.c
• fbconnect.com*
• ficenterprisebanm*
• harrisprivatebanankofny.com*
• hutch.com*
• ibanking-service
• ierview.membersuzuhoe-treasurer.
• itutioncorp.org*
• l.mibank.com*
• l.selectpayment.
• moharrisprivateb.bankofny.com*
• mycorporatecure.fnbhutch.cmoneyger*
• neymanagergps.co
• nlinebanking.banline.tdbank.com*k.com*
• nlinencr.com*
• oneyger.com*
• onlinencr.k.com*
• paylinks.cunet.o
• rcial.wachovia.c*phcp/servlet*
• robankdirect.com
• rp.amegybank.comineserv/CM*
• rview.membersunihoe-treasurer.co
• s.citibank.citigitizensbank.com
• s.com*
• secure2.umb.com*ibertymutualbusionline.metavante*
• servlet/telleecurentry.calban
• sh.fsbnm.com*
• sinessonline.hunger.com*
• solutions.html*
• ssbanking.cibc.c!
• stitutioncorp.or
• stsource.com*
• t.capitalonebanknsultnc*
• tsbk.inetbanker.
• webcashmgmt.com*bank.com*
• wtdirect.com*
• ycorporate.org*
• nbhutch.com*
• ylinks.cunet.orgbankonline.sboff
• ymanagergps.com*

Other Details

This worm deletes the initially executed copy of itself

NOTES:

It monitors the following browsers:

• IEXPLORE.EXE
• FIREFOX.EXE

It has the following backdoor capabilities:

• Update itself
• Download other files
• Steal login credentials
• Monitors cookies
• Download and execute additional files
• Upload collected certificates and credentials

It collects configuration data and store it in the registry:

HKEY_CURRENT_USER\Software\Microsoft\Windows Media Center\{random}
{default} = {config file}