1. /
  2. Security Response/
  3. W32.Pykspa.D

W32.Pykspa.D

Risk Level 1: Very Low

Discovered:
September 10, 2007
Updated:
September 10, 2007 5:54:42 PM
Also Known As:
WORM_SKIPI.A [Trend], W32/Pykse.worm.b [McAfee], WORM_SKIPI.B [Trend], Skipi.A [Panda Software]
Type:
Worm
Infection Length:
188,400 bytes - 188,600 bytes
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP
When W32.Pykspa.D is executed, it displays the %Windir%\Soap Bubbles.bmp graphic file, if it already exists on the compromised computer.

The worm creates the following mutex so that only one instance of the worm runs at a time:
pyksp2.0.0.3gM-2oo8&-825190¬

Next, the worm opens and displays the following file:
%Windir%\Soap Bubbles.bmp




The worm changes the status of the Skype user to DND (Do Not Disturb).

It then copies itself to the following files:
  • %System%\mshtmldat32.exe
  • %System%\sdrivew32.exe
  • %System%\winlgcvers.exe
  • %System%\wndrivs32.exe

The worm creates following registry entries, so that it runs every time Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\"Services Start" = "mshtmldat32.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Windows Sys" = "explorer.exe mshtmldat32.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Logon Settings" = "mshtmldat32.exe

It then modifies the following registry entry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run\"Policies Options" = "6D 00"

The worm also creates the following subkeys:
HKEY_LOCAL_MACHINE\SOFTWARE\RMX\cfg
HKEY_CURRENT_USER\Software\RMX\cfg

The worm then ends any processes it finds with the following names:
  • _AVP32
  • _AVPCC
  • _AVPM
  • 53ARCH
  • ACKWIN32
  • ADAWARE
  • ADVXDWIN
  • AGENTSVR
  • AGENTW
  • ALERTSVC
  • ALEVIR
  • ALOGSERV
  • AMON
  • AMON9X
  • ANTI-TROJAN
  • ANTIVIRUS
  • ANTS
  • APIMONITOR
  • APLICA32
  • APORTS
  • APVXDWIN
  • ARMKILLER
  • ARR
  • ATCON
  • ATGUARD
  • ATRO55EN
  • ATUPDATER
  • ATUPDATER
  • ATWATCH
  • AUPDATE
  • AUPDATE
  • AUTODOWN
  • AUTODOWN
  • AUTOTRACE
  • AUTOTRACE
  • AUTOUPDATE
  • AUTOUPDATE
  • AVCONSOL
  • AVE32
  • AVGCC32
  • AVGCTRL
  • AVGNT
  • AVGSERV
  • AVGSERV9
  • AVGUARD
  • AVGW
  • AVKPOP
  • AVKSERV
  • AVKSERVICE
  • AVKWCTl9
  • AVLTMAIN
  • AVNT
  • AVP
  • AVP32
  • AVPCC
  • AVPDOS32
  • AVPM
  • AVPTC32
  • AVPUPD
  • AVPUPD
  • AVSCHED32
  • AVSYNMGR
  • AVWIN95
  • AVWINNT
  • AVWUPD
  • AVWUPD32
  • AVWUPD32
  • AVWUPSRV
  • AVXMONITOR9X
  • AVXMONITORNT
  • AVXQUAR
  • AVXQUAR
  • BACKWEB
  • BARGAINS
  • BCW
  • BD_PROFESSIONAL
  • BEAGLE
  • BELT
  • BIDEF
  • BIDSERVER
  • BIPCP
  • BIPCPEVALSETUP
  • BISP
  • BLACKD
  • BLACKICE
  • BLSS
  • BOOTCONF
  • BOOTWARN
  • BORG2
  • BPC
  • BRASIL
  • BS120
  • BUNDLE
  • BVT
  • CCAPP
  • CCEVTMGR
  • CCPXYSVC
  • CDP
  • CFD
  • CFGWIZ
  • CFIADMIN
  • CFIAUDIT
  • CFIAUDIT
  • CFINET
  • CFINET32
  • Claw95
  • CLAW95CF
  • CLAW95CF
  • CLEAN
  • CLEANER
  • CLEANER3
  • CLEANPC
  • CLICK
  • CLIENT
  • CMD32
  • CMESYS
  • CMGRDIAN
  • CMON016
  • CONDOM
  • CPD
  • CPF9X206
  • CPFNT206
  • CRACKER
  • CTRL
  • CWNB181
  • CWNTDWMO
  • DATEMANAGER
  • DCOMX
  • DEFALERT
  • DEFSCANGUI
  • DEFWATCH
  • DEPUTY
  • DIVX
  • DLLCACHE
  • DLLREG
  • DOORS
  • DPF
  • DPFSETUP
  • DPPS2
  • DRWATSON
  • DRWEB32
  • DRWEBUPW
  • DSSAGENT
  • DUMP
  • DVP95
  • DVP95_0
  • ECENGINE
  • EFPEADM
  • EMSW
  • ENT
  • ESAFE
  • ESCANH95
  • ESCANHNT
  • ESCANV95
  • ESPWATCH
  • ETHEREAL
  • ETRUSTCIPE
  • EVPN
  • EXE.AVXW
  • EXPERT
  • EXPLORE
  • F-AGNT95
  • F-AGOBOT
  • F-PROT
  • F-PROT95
  • F-STOPW
  • FAMEH32
  • FAST
  • FCH32
  • FIH32
  • FINDVIRU
  • FIREWALL
  • FLOWPROTECTOR
  • FNRB32
  • FP-WIN
  • FP-WIN_TRIAL
  • FPORT
  • FPROT
  • FRHED
  • FRW
  • FSAA
  • FSAV
  • FSAV32
  • FSAV530STBYB
  • FSAV530WTBYB
  • FSAV95
  • FSGK32
  • FSM32
  • FSMA32
  • FSMB32
  • GATOR
  • GBMENU
  • GBPOLL
  • GENERICS
  • GMT
  • GUARD
  • GUARDDOG
  • HACKTRACERSETUP
  • HBINST
  • HBSRV
  • HIJACKTHIS
  • HONEYD
  • HOTACTIO
  • HOTPATCH
  • HTLOG
  • HTPATCH
  • HWPE
  • HXDL
  • HXIUL
  • IAMAPP
  • IAMSERV
  • IAMSTATS
  • IBMASN
  • IBMAVSP
  • ICESWORD
  • ICLOAD95
  • ICLOADNT
  • ICMON
  • ICSUPP95
  • ICSUPP95
  • ICSUPPNT
  • IDLE
  • IEDLL
  • IEDRIVER
  • IEXPLORER
  • IFACE
  • IFW2000
  • IISLOCKD
  • INETLNFO
  • INFUS
  • INFWIN
  • INIT
  • INTDEL
  • INTREN
  • IOMON98
  • IPARMOR
  • IRIS
  • ISASS
  • ISRV95
  • ISTSVC
  • JAMMER
  • JDBGMRG
  • JEDI
  • KAV
  • KAVLITE40ENG
  • KAVPERS40ENG
  • KAVPF
  • KAVSVC
  • KAZZA
  • KEENVALUE
  • KERNEL32
  • LAUNCHER
  • LDNETMON
  • LDPRO
  • LDPROMENU
  • LDSCAN
  • LNETINFO
  • LOADER
  • LOADER
  • LOCALNET
  • LOCKDOWN
  • LOCKDOWN2000
  • LOGGER
  • LOGVIEWER
  • LOOKOUT
  • LORDPE
  • LSETUP
  • LUALL
  • LUALL
  • LUAU
  • LUCOMSERVER
  • LUINIT
  • LUSPT
  • MAPISVC32
  • MCAGENT
  • MCMNHDLR
  • MCSHIELD
  • MCTOOL
  • MCUPDATE
  • MCUPDATE
  • MCVSRTE
  • MCVSSHLD
  • MFIN32
  • MFW2EN
  • MFWENG3.02D30
  • MGAVRTCL
  • MGAVRTE
  • MGHTML
  • MGUI
  • MINILOG
  • MMOD
  • MONITOR
  • MOOLIVE
  • MOSTAT
  • MPFAGENT
  • MPFSERVICE
  • MPFTRAY
  • MRFLUX
  • MSAPP
  • MSBB
  • MSBLAST
  • MSCACHE
  • MSCCN32
  • MSCMAN
  • MSCONFIG
  • MSDM
  • MSDOS
  • MSIEXEC16
  • MSINFO32
  • MSLAUGH
  • MSMGT
  • MSMSGRI32
  • MSSMMC32
  • MSSYS
  • MSVXD
  • MU0311AD
  • MWATCH
  • N32SCANW
  • NAV
  • NAVAP.NAVAPSVC
  • NAVAPSVC
  • NAVAPW32
  • NAVDX
  • NAVLU32
  • NAVNT
  • NAVSTUB
  • NAVW32
  • NAVWNT
  • NC2000
  • NCINST4
  • NDD32
  • NEOMONITOR
  • NEOWATCHLOG
  • NETARMOR
  • NETD32
  • NETINFO
  • NETMON
  • NETSCANPRO
  • NETSTAT
  • NETUTILS
  • NISSERV
  • NISUM
  • NMAIN
  • NOD32
  • NOD32CC
  • NOD32KRN
  • NOD32KUI
  • NOD32M2
  • NORMIST
  • NOTSTART
  • NPFMESSENGER
  • NPROTECT
  • NPSCHECK
  • NPSSVC
  • NSCHED32
  • NSSYS32
  • NSTASK32
  • NSUPDATE
  • NTRTSCAN
  • NTVDM
  • NTXconfig
  • NUI
  • NUPGRADE
  • NUPGRADE
  • NVARCH16
  • NVC95
  • NVSVC32
  • NWINST4
  • NWSERVICE
  • NWTOOL16
  • OLLYDBG
  • OLLYDBG
  • ONSRVR
  • OPTIMIZE
  • OSTRONET
  • OTFIX
  • OUTPOST
  • OUTPOST
  • OUTPOSTINSTALL
  • PADMIN
  • PANIXK
  • PATCH
  • PAVCL
  • PAVPROXY
  • PAVSCHED
  • PAVW
  • PCC2002S902
  • PCC2K_76_1436
  • PCCIOMON
  • PCCNTMON
  • PCCWIN97
  • PCCWIN98
  • PCDSETUP
  • PCFWALLICON
  • PCIP10117_0
  • PCSCAN
  • PDSETUP
  • PEDASM
  • PENIS
  • PERISCOPE
  • PERSFW
  • PERSWF
  • pexplorer
  • PF2
  • PFWADMIN
  • PGMONITR
  • PINGSCAN
  • PLATIN
  • PMDUMP
  • PMON
  • POP3TRAP
  • POPROXY
  • POPSCAN
  • PORTDETECTIVE
  • PORTMONITOR
  • POWERSCAN
  • PPINUPDT
  • PPTBC
  • PPVSTOP
  • PRIZESURFER
  • PRMT
  • PRMVR
  • PROCDUMP
  • PROCESSMONITOR
  • PROCEXP
  • PROGRAMAUDITOR
  • PROPORT
  • PROTECTX
  • PSPF
  • PURGE
  • PUSSY
  • PVIEW95
  • QCONSOLE
  • QSERVER
  • RAPAPP
  • RAV7
  • RAV7WIN
  • RAV8WIN32ENG
  • RAY
  • RB32
  • RCSYNC
  • REALMON
  • REGCLEANER
  • REGED
  • REGEDIT
  • REGEDT32
  • RERGCLEANR
  • RESCUE
  • RESCUE32
  • RRGUARD
  • RSHELL
  • RTVSCAN
  • RTVSCN95
  • RULAUNCH
  • RUN32DLL
  • RUNDLL
  • RUNDLL16
  • RUXDLL32
  • SAFEWEB
  • SAHAGENT
  • SAVE
  • SAVENOW
  • SBSERV
  • SCAM32
  • SCAN32
  • SCAN95
  • SCANPM
  • SCRSCAN
  • SCRSVR
  • SCVHOST
  • SERV95
  • SERVICE
  • SERVLCE
  • SERVLCES
  • SETUPVAMEEVAL
  • SFC
  • SGSSFW32
  • SHELLSPYINSTALL
  • SHN
  • SHOWBEHIND
  • SMC
  • SMS
  • SMSS32
  • SOAP
  • SOFI
  • SPERM
  • SPF
  • SPHINX
  • SPOLER
  • SPOOLCV
  • SPOOLSV32
  • SPYXX
  • SREXE
  • SRIN
  • SRNG
  • SS3EDIT
  • SSG_4104
  • SSGRATE
  • ST2
  • START
  • STCLOADER
  • SUPFTRL
  • SUPPORT
  • SUPPORTER5
  • SVC
  • SVCHOSTC
  • SVCHOSTS
  • SVSHOST
  • SWEEP95
  • SYMPROXYSVC
  • SYMTRAY
  • SYSEDIT
  • SYSTEM
  • SYSTEM32
  • SYSUPD
  • TASKMG
  • TASKMO
  • TASKMON
  • TAUMON
  • TBSCAN
  • TCA
  • TCM
  • TCPVIEW
  • TDS-3
  • TDS2-98
  • TDS2-NT
  • TEEKIDS
  • TEST
  • TFAK
  • TFAK5
  • TGBOB
  • TITANIN
  • TITANINXP
  • TRACERT
  • TRICKLER
  • TRJSCAN
  • TRJSETUP
  • TROJANTRAP3
  • TSADBOT
  • TVMD
  • TVTMD
  • UNDOBOOT
  • UPDAT
  • UPDATE
  • UPDATE
  • UPGRAD
  • UTPOST
  • VBCMSERV
  • VBCONS
  • VBUST
  • VBWIN9X
  • VBWINNTW
  • VCSETUP
  • VET32
  • VET95
  • VETTRAY
  • VFSETUP
  • VIR-HELP
  • VNLAN300
  • VNPC3000
  • VPC32
  • VPC42
  • VPFW30S
  • VPTRAY
  • VSCAN40
  • VSCENU6.02D30
  • VSCHED
  • VSECOMR
  • VSHWIN32
  • VSISETUP
  • VSMAIN
  • VSMON
  • VSSTAT
  • VSWIN9XE
  • VSWINNTSE
  • VSWINPERSE
  • W32DSM89
  • W32DSM89
  • W9X
  • WATCHDOG
  • WEBDAV
  • WEBSCANX
  • WEBTRAP
  • WFINDV32
  • WGFE95
  • WHOSWATCHINGME
  • WIMMUN32
  • WIN-BUGSFIX
  • WIN32
  • WIN32US
  • WINACTIVE
  • WINDBG
  • WINDOW
  • WINDOWS
  • WINDUMP
  • WININETD
  • WININIT
  • WININITX
  • WINLOGIN
  • WINMAIN
  • WINNET
  • WINPPR32
  • WINRECON
  • WINSERVN
  • WINSSK32
  • WINSTART
  • WINSTART001
  • WINTSK32
  • WINUPDATE
  • WKUFIND
  • WNAD
  • WNT
  • WRADMIN
  • WRCTRL
  • WSBGATE
  • WUPDATER
  • WUPDT
  • XPF202EN
  • ZAPRO
  • ZAPSETUP3001
  • ZATUTOR
  • ZONALM2601
  • ZONEALARM

The worm modifies the hosts file by creating random IP addresses for each of the server entries listed below, effectively disabling access to the following security-related sites:
  • antivirus.esaugumas.lt
  • aonealarm.com
  • avast.com
  • avp.com
  • barracudanetworks.com
  • bitdefender.com
  • bkav.com.vn
  • boss.drweb.comdrweb.com
  • ca.com
  • customer.symantec.com
  • dispatch.mcafee.com
  • dnl-us[RANGE].kaspersky-labs.com
  • download.mcafee.com
  • download[RANGE].avast.com
  • downloads-us1.kaspersky-labs.com
  • downloads[RANGE].kaspersky-labs.com
  • esaugumas.lt
  • esecurity.lt
  • eset.com
  • f-secure.com
  • free-av.com
  • ftp.downloads[RANGE].kaspersky-labs.com
  • grisoft.com
  • grisoft.czfree.grisoft.com
  • kaspersky-labs.com
  • kaspersky.com
  • kaspersky.ru
  • liveupdate.symantec.com
  • liveupdate.symantecliveupdate.com
  • mast.mcafee.com
  • mcafee.com
  • microsoft.com
  • msk[RANGE].drweb.com
  • my-etrust.com
  • nai.com
  • networkassociates.com
  • nod32-es.com
  • nod32.com
  • nod32.datsec.de
  • nod32.de
  • nod32.it
  • nod32.nl
  • norman.com
  • pandasecurity.com
  • pandasoftware.com
  • rads.mcafee.com
  • rs[RANGE].avast.com
  • sandbox.norman.com
  • secure.nai.com
  • security.symantec.com
  • s[RANGE].avast.com
  • sophos.com
  • symantec.comsecurityresponse.symantec.com
  • trendmicro.com
  • u[RANGE].eset.com
  • update.symantec.com
  • updates.symantec.com
  • updates1.kaspersky-labs.com
  • updates2.kaspersky-labs.com
  • updates3.kaspersky-labs.com
  • updates4.kaspersky-labs.com
  • updates5.kaspersky-labs.com
  • us.mcafee.com
  • viruslist.com
  • virusscan.jotti.org
  • virustotal.com
  • windowsupdate.microsoft.com
  • www.antivirus.esaugumas.lt
  • www.aonealarm.com
  • www.avast.com
  • www.avp.com
  • www.barracudanetworks.com
  • www.bitdefender.com
  • www.bkav.com.vn
  • www.boss.drweb.comdrweb.com
  • www.ca.com
  • www.customer.symantec.com
  • www.dispatch.mcafee.com
  • www.dnl-us[RANGE].kaspersky-labs.com
  • www.dnl-us4.kaspersky-labs.com
  • www.dnl-us5.kaspersky-labs.com
  • www.dnl-us6.kaspersky-labs.com
  • www.dnl-us7.kaspersky-labs.com
  • www.dnl-us8.kaspersky-labs.com
  • www.download.mcafee.com
  • www.downloads-us1.kaspersky-labs.com
  • www.downloads1.kaspersky-labs.com
  • www.downloads2.kaspersky-labs.com
  • www.downloads3.kaspersky-labs.com
  • www.downloads4.kaspersky-labs.com
  • www.downloads5.kaspersky-labs.com
  • www.esaugumas.lt
  • www.esecurity.lt
  • www.eset.com
  • www.f-secure.com
  • www.free-av.com
  • www.ftp.downloads1.kaspersky-labs.com
  • www.ftp.downloads2.kaspersky-labs.com
  • www.ftp.downloads3.kaspersky-labs.com
  • www.ftp.downloads4.kaspersky-labs.com
  • www.ftp.downloads5.kaspersky-labs.com
  • www.grisoft.com
  • www.grisoft.czfree.grisoft.com
  • www.kaspersky-labs.com
  • www.kaspersky.com
  • www.kaspersky.ru
  • www.liveupdate.symantec.com
  • www.liveupdate.symantecliveupdate.com
  • www.mast.mcafee.com
  • www.mcafee.com
  • www.microsoft.com
  • www.msk1.drweb.com
  • www.msk2.drweb.com
  • www.msk3.drweb.com
  • www.msk4.drweb.com
  • www.my-etrust.com
  • www.nai.com
  • www.networkassociates.com
  • www.nod32-es.com
  • www.nod32.com
  • www.nod32.datsec.de
  • www.nod32.de
  • www.nod32.it
  • www.nod32.nl
  • www.norman.com
  • www.pandasecurity.com
  • www.pandasoftware.com
  • www.rads.mcafee.com
  • www.sandbox.norman.com
  • www.secure.nai.com
  • www.security.symantec.com
  • www.sophos.com
  • www.symantec.comsecurityresponse.symantec.com
  • www.trendmicro.com
  • www.update.symantec.com
  • www.updates.symantec.com
  • www.updates1.kaspersky-labs.com
  • www.updates2.kaspersky-labs.com
  • www.updates3.kaspersky-labs.com
  • www.updates4.kaspersky-labs.com
  • www.updates5.kaspersky-labs.com
  • www.us.mcafee.com
  • www.viruslist.com
  • www.virusscan.jotti.org
  • www.virustotal.com
  • www.windowsupdate.microsoft.com


Note:
[RANGE] represents the range of numbers representing different server names.

The worm then accesses the list of Skype contacts and sends a chat message to each contact. The worm checks the language settings of the Skype client and is capable of sending chat messages in different languages. The messages will take some form of the following:
  • :S
  • (devil)
  • (happy)
  • (mm) kaip as taves noriu
  • (rofl)
  • a ?
  • as net nezinau ka tavo vietoj daryciau.
  • cia biski su photoshopu pazaidziau bet bet irgi gerai atrodai :D
  • cia tu isimetei ?
  • esi?
  • haha lol
  • hey
  • how are u ? :)
  • I used photoshop and edited it
  • kas cia tavim taip isderge ? =]]
  • labas
  • look
  • look what crazy photo Tiffany sent to me,looks cool
  • matai :D
  • now u populr
  • oh sry not for u
  • oops sorry please don't look there :S
  • ops
  • pala biski
  • patinka?
  • really funny
  • sky
  • this (happy) sexy one
  • u happy ?
  • vgeras ane ?
  • what ur friend name wich is in photo ?
  • where I put ur photo :D
  • you checked ?
  • your photos looks realy nice
  • zek kur tavo foto metos isdergta
  • ziurek kur tavo foto imeciau :D

Note: At the time of writing, Latvian, Russian, and English have been observed.

The worm includes one of the following links that point to a copy of the worm as part of the chat message:
[http://]www.myimagespace.net/erotic-gallerys/usr5d8c/dsc02[REMOVED]
[http://]www.fakme.org/erotic-gallerys/usr5d8c/dsc02[REMOVED]

If a user clicks on above link, the worm downloads a copy of itself on to the compromised computer.

The worm then saves the downloaded file to the following location:
%System%\drnnctop.exe - detected as Infostealer

It may also contact the following sites to retrieve updated links that contain a copy of Infostealer:
  • [http://]rrrr.bedclop.com/inde[REMOVED]
  • [http://]ragai.myartsonline.com/inde[REMOVED]
  • [http://]trrrr.cpa-site.com/inde[REMOVED]
  • [http://]zopa.110mb.com/inde[REMOVED]
  • [http://]zappa.4444mb.com/inde[REMOVED]
  • [http://]gamesforum.com/membe[REMOVED]
  • [http://]sdgfg.alladultmale.com/inde[REMOVED]
  • [http://]www.freewebs.com/kole123a/inde[REMOVED]
  • [http://]members.lycos.co.uk/kale77a/inde[REMOVED]
  • [http://]forum.ragezone.com/members/superkliper9999/inde[REMOVED]
  • [http://]fdfddf.attorney-site.com/inde[REMOVED]
  • [http://]asdffdgfg.mylawsite.net/inde[REMOVED]
  • [http://]kupralana77.110mb.com/inde[REMOVED]
  • [http://]www.kale45.php0h.com/inde[REMOVED]
  • [http://]kale99.blog.co.uk/inde[REMOVED]


The worm creates the following files on removable drives:
[DRIVE LETTER]:\game.exe
[DRIVE LETTER]:\zjbs.exe

It then creates the following file in order to launch zjbs.exe when the drive is accessed:
[DRIVE LETTER]:\autorun.inf

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.
Writeup By: Sean Kiernan
Summary| Technical Details| Removal

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