W32/Ahker-B is a mass-mailing worm.
W32/Ahker-B attempts to spread by downloading a ZIP archive containing the worm file and sending this as an email attachment to addresses obtained from Outlook Express. Emails take the following form:
Subject line:
Service Pack 2 BUG!!
Message text:
Dear user I have been informed that there was a BUG in Windows Service Pack 2
which was fixed I recommend you to download this Patch version which will fix
the bug and keep your system safe.
You will find the Patch file in the attachment, feal free to send it to
anyone.
I'll be in touch with you as soon as another bug is found.
Regards,
A.H
The worm is attached with the filename FIX_SP2.ZIP.
The worm attempts to kill a number of processes, including anti-virus applications and security applications.
The worm attempts to disable a number of security-related features of Windows, including Windows Firewall, Windows Update and System Restore.
The worm blocks access to a number of websites, including anti-virus websites.
The worm attempts to change the computer name to "Agent Hacker".
The worm may shut down the infected machine.
W32/Ahker-B is a mass-mailing worm.
W32/Ahker-B attempts to spread by downloading a ZIP archive containing the worm file and sending this as an email attachment to addresses obtained from Outlook Express. Emails take the following form:
Subject line:
Service Pack 2 BUG!!
Message text:
Dear user I have been informed that there was a BUG in Windows Service Pack 2
which was fixed I recommend you to download this Patch version which will fix
the bug and keep your system safe.
You will find the Patch file in the attachment, feal free to send it to
anyone.
I'll be in touch with you as soon as another bug is found.
Regards,
A.H
The worm is attached with the filename FIX_SP2.ZIP. This file is temporarily stored in C:\.
The worm attempts to kill the following processes:
_findviru.exe
Ackwin32.exe
AGENTSVR.exe
Alogserv.exe
Amon.exe
Anti-trojan.exe
ANTIVIRUS.exe
ANTS.EXE
APIMONITOR.EXE
APLICA32.EXE
Apvxdwin.exe
ATCON.EXE
Atguard.exe
ATRO55EN.EXE
ATUPDATER
ATUPDATER.exe
ATWATCH.EXE
Au.exe
AUPDATE.exe
AUTODOWN.exe
AUTOTRACE.exe
AUTOUPDATE.exe
AVCONSOL.EXE
Ave32.exe
AVGSERV9.EXE
Avkserv.exe
AVLTMAIN.exe
Avnt.exe
Avpcc.exe
Avpcc.exe
avpm.exe
Avpm.exe
AVprotect9x.exe
AVPUPD.exe
avserve2.exe
AVSYNMGR.EXE
Avwin95.exe
AVWUPD32.exe
AVXQUAR.exe
BD_PROFESSIONAL.EXE
BIDEF.EXE
BIDSERVER.EXE
BIPCP.EXE
BIPCPEVALSETUP.EXE
BISP.EXE
BLACKD.EXE
BlackIce.exe
BOOTWARN.EXE
BORG2.EXE
BS120.EXE
ccApp.exe
CDP.EXE
CFGWIZ.EXE
CFIADMIN.EXE
CFIAUDIT.exe
CFINET.EXE
CFINET32.EXE
Claw95cf.exe
CLEAN.EXE
CLEANER.EXE
CLEANER3.EXE
CLEANPC.EXE
CMGRDIAN.EXE
Cmgrdian.exe
CMON016.EXE
CPD.EXE
CPF9X206.EXE
CPFNT206.EXE
CV.EXE
CWNB181.EXE
CWNTDWMO.EXE
D3dupdate.exe
DEFWATCH.EXE
DEPUTY.EXE
dfw.exe
DPF.EXE
DPFSETUP.EXE
DRWATSON.EXE
DRWEBUPW.EXE
DRWEBUPW.exe
Ecengine.exe
ENT.EXE
Esafe.exe
ESCANH95.EXE
ESCANHNT.EXE
ESCANV95.EXE
EXANTIVIRUS-CNET.EXE
F-prot95.exe
FAST.EXE
Findviru.exe
FIREWALL.EXE
FLOWPROTECTOR.EXE
Fp-win.exe
FP-WIN_TRIAL.EXE
Fprot.exe
FRW.EXE
FSAV.EXE
fsav32.exe
FSAV530STBYB.EXE
FSAV530WTBYB.EXE
FSAV95.EXE
fsbwsys.exe
fsgk32.exe
fsm32.exe
fssm32.exe
fvprotect.exe
GBMENU.EXE
GBPOLL.EXE
GUARD.EXE
Guarddog.exe
HACKTRACERSETUP.EXE
HTLOG.EXE
HWPE.EXE
Iamapp.exe
IAMAPP.EXE
IAMSERV.EXE
ICLOAD95.EXE
ICLOADNT.EXE
ICMON.EXE
ICSSUPPNT.EXE
ICSSUPPNT.exe
ICSUPP95.exe
ICSUPP95.EXE
ICSUPPNT.EXE
IFW2000.EXE
Iomon98.exe
IPARMOR.EXE
IRIS.EXE
JAMMER.EXE
KAVLITE40ENG.EXE
KAVPERS40ENG.EXE
KERIO-PF-213-EN-WIN.EXE
KERIO-WRL-421-EN-WIN.EXE
KERIO-WRP-421-EN-WIN.EXE
KILLPROCESSSETUP161.EXE
LDPRO.EXE
LOCALNET.EXE
LOCKDOWN.EXE
LOCKDOWN2000.EXE
Lookout.exe
LSETUP.EXE
LUALL.exe
LUCOMSERVER.EXE
LUINIT.EXE
mcagent.exe
MCAGENT.EXE
MCUPDATE.exe
MCUPDATE.EXE
MFW2EN.EXE
MFWENG3.02D30.EXE
MGUI.EXE
MINILOG.EXE
MOOLIVE.EXE
MRFLUX.EXE
msblast.exe
MSCONFIG.EXE
MSINFO32.EXE
MSSMMC32.EXE
MU0311AD.EXE
NAV80TRY.EXE
NAVAPSvc.exe
Navapsvc.exe
Navapw32.exe
navdx.exe
NAVDX.EXE
navstub.exe
NAVSTUB.EXE
Navt.exe
Navw32.exe
Navwnt.exe
Navwt.exe
nc2000.exe
NC2000.EXE
NCINST4.EXE
ndd32.exe
NDD32.EXE
NEOMONITOR.EXE
NETARMOR.EXE
netarmor.exe
NETINFO.EXE
netinfo.exe
NETMON.EXE
netmon.exe
NETSCANPRO.EXE
NETSPYHUNTER-1.2.EXE
NETSTAT.EXE
NISSERV.EXE
NISUM.EXE
NMAIN.EXE
nmain.exe
Nod32.exe
NORTON_INTERNET_SECU_3.0_407.EXE
NPF40_TW_98_NT_ME_2K.EXE
NPFMESSENGER.EXE
nprotect.exe
NSCHED32.EXE
Nsplugin.exe
NTVDM.EXE
ntvdm.exe
NUPGRADE.exe
NUPGRADE.exe
NVARCH16.EXE
NWINST4.EXE
NWTOOL16.EXE
Ogrc.exe
ostronet.exe
OSTRONET.EXE
Outpost.exe
OUTPOST.EXE
OUTPOSTINSTALL.EXE
OUTPOSTPROINSTALL.EXE
PADMIN.EXE
PANIXK.EXE
PAVPROXY.EXE
PCC2002S902.EXE
PCC2K_76_1436.EXE
pccguide.exe
pcciomon.exe
PCCIOMON.EXE
PCDSETUP.EXE
PCFWALLICON.EXE
PCIP10117_0.EXE
PDSETUP.EXE
PERISCOPE.EXE
PERSFW.EXE
PF2.EXE
PFWADMIN.EXE
PINGSCAN.EXE
PLATIN.EXE
POPROXY.EXE
POPSCAN.EXE
PORTDETECTIVE.EXE
PPINUPDT.EXE
PPTBC.EXE
PPVSTOP.EXE
PROCEXPLORERV1.0.EXE
PROPORT.EXE
PROTECTX.EXE
PSPF.EXE
PURGE.EXE
PVIEW95.EXE
QCONSOLE.EXE
QSERVER.EXE
Rav7.exe
RAV8WIN32ENG.EXE
regedit.exe
regedit32.exe
RESCUE.EXE
RESCUE32.EXE
RRGUARD.EXE
RSHELL.EXE
RTVSCN95.EXE
Rulaunch.exe
RULAUNCH.EXE
SAFEWEB.EXE
SAVScan.exe
SBSERV.EXE
Scan32.exe
SD.EXE
SETUP_FLOWPROTECTOR_US.EXE
SETUPVAMEEVAL.EXE
SFC.EXE
SGSSFW32.EXE
SHELLSPYINSTALL.EXE
SHN.EXE
SMC.EXE
Smss.exe
SOFI.EXE
SPF.EXE
SPHINX.EXE
Spider.exe
SPYXX.EXE
SS3EDIT.EXE
ST2.EXE
SUPFTRL.EXE
SUPPORTER5.EXE
SYMPROXYSVC.EXE
SYSEDIT.EXE
taskmgr.exe
TASKMON.EXE
TAUMON.EXE
TAUSCAN.EXE
TC.EXE
TCA.EXE
TCM.EXE
TDS-3.EXE
TDS2-98.EXE
TDS2-NT.EXE
TFAK5.EXE
TGBOB.EXE
TITANIN.EXE
TITANINXP.EXE
tnbutil.exe
TRACERT.EXE
TRJSCAN.EXE
TRJSETUP.EXE
TROJANTRAP3.EXE
UNDOBOOT.EXE
UPDATE.EXE
UPDATE.exe
VBCMSERV.EXE
VBCONS.EXE
vbcons.exe
vbsntw.exe
VBUST.EXE
vbust.exe
VBWIN9X.EXE
VBWINNTW.EXE
VCSETUP.EXE
Vet95.exe
Vettray.exe
VFSETUP.EXE
VIRUSMDPERSONALFIREWALL.EXE
VNLAN300.EXEVNPC3000.EXE
VPC42.EXE
VPFW30S.EXE
VPTRAY.EXE
VSCENU6.02D30.EXE
VSECOMR.EXE
VSHWIN32.EXE
VSISETUP.EXE
Vsmain.exe
vsmain.exe
VSMAIN.EXE
vsmon.exe
VSMON.EXE
vsstat.exe
VSSTAT.EXE
VSWIN9XE.EXE
VSWINNTSE.EXE
VSWINPERSE.EXE
W32DSM89.EXE
W9X.EXE
WATCHDOG.EXE
WEBSCANX.EXE
WGFE95.EXE
WHOSWATCHINGME.EXE
winlogon.exe
WINRECON.EXE
WNT.EXE
WRADMIN.EXE
WRCTRL.EXE
WSBGATE.EXE
WYVERNWORKSFIREWALL.EXE
XPF202EN.EXE
ZAPRO.EXE
ZAPSETUP3001.EXE
ZATUTOR.EXE
ZAUINST.EXE
Zonalarm.exe
ZONALM2601.EXE
ZONEALARM.EXE
The worm may shut down the infected machine.
The worm writes to the file C:\NORTON ANTIVIRUS.TXT the string "Script Blocking: Disabled".
W32/Ahker-B copies itself to the following locations:
<windows>\SERVICES.EXE
<user>\Start Menu\Programs\Startup\SERVICES.EXE
The worm creates the following registry entries, in an attempt to run itself on system startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Norton Auto-Protect
SERVICES.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\runservices-
Windows Service
SERVICES.exe
HKCR\txtfile\shell\open\command
SERVICES.exe %1
The worm attempts to disable various security features of Windows by creating the following registy entries:
HKLM\Software\Microsoft\windows NT\CurrentVersion\systemrestore
DisableSR
1
HKCU\Software\Microsoft\windows NT\CurrentVersion\systemrestore
DisableSR
1
HKCU\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
EnableFirewall
1
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
EnableFirewall
1
HKCU\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
EnableFirewall
1
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
EnableFirewall
1
HKCU\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
NoAutoUpdate
1
HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
AUOptions
1
HKCU\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
AUOptions
1
HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
NoAutoUpdate
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1
HKCU\Software\Microsoft\security center
FirewallDisableNotify
1
HKCU\Software\Microsoft\security center
UpdatesDisableNotify
1
HKCU\Software\Microsoft\security center
AntiVirusDisableNotify
1
HKLM\SOFTWARE\Microsoft\security center
FirewallDisableNotify
1
HKLM\SOFTWARE\Microsoft\security center
UpdatesDisableNotify
1
HKLM\SOFTWARE\Microsoft\security center
AntiVirusDisableNotify
1
The worm appends the following to the HOSTS file in order to block access to various websites:
127.0.0.1 www.astalavista.com
127.0.0.1 www.cnn.com
127.0.0.1 www.coderheaven.com
127.0.0.1 www.fbi.gov
127.0.0.1 www.gamerevolution.com
127.0.0.1 www.geocities.com
127.0.0.1 www.google.com
127.0.0.1 www.hackers.com
127.0.0.1 www.hotmail.com
127.0.0.1 www.idm.com
127.0.0.1 www.messenger.msn.com
127.0.0.1 www.microsoft.com
127.0.0.1 www.msn.com
127.0.0.1 www.norton.com
127.0.0.1 www.rohitab.com
127.0.0.1 www.symantec.com
127.0.0.1 www.worldsex.com
127.0.0.1 www.wwe.com
127.0.0.1 www.yahoo.com
The worm attempts to disable REGEDIT.EXE and some other processes by creating the following registry entries:
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
1
regedit.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
2
notepad.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
3
wordpad.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
4
write.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
5
wuauclt.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
6
wupdmgr.exe
HKCU\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun
7
C:\Program Files\MSN Messenger\msnmsgr.exe
The worm additionally makes the following registry changes:
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoRun
1
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
"W32.Ahker.B@mm"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
Version
"B"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
Coded In
"Visual Basic 6.0"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
Coded By
"Agent Hacker"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
Spread
"VIA Outlook"
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Agent Hacker
Exploit
"Symantec Norton Antivirus Script Blocker Denial Of Service Vulnerability"
HKLM\SOFTWARE\Microsoft\windowsnt\currentversion
ProductId
"Agent Hacker"
HKLM\SOFTWARE\Microsoft\Internet Explorer\Registration
ProductId
"Agent Hacker"
The worm also attempts to change the computer name to "Agent Hacker".