TROJ_DLOAD.SMAB
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan may be dropped by other malware. It arrives as a component bundled with malware/grayware/spyware packages.
TECHNICAL DETAILS
Arrival Details
This Trojan may be dropped by other malware.
It arrives as a component bundled with malware/grayware/spyware packages.
Installation
This Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:
- Local\UIEI
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CLASSES_ROOT\PROTOCOLS\Filter\
text/html
(Default) = "Microsoft Improved HTML MIME Filter"
HKEY_CLASSES_ROOT\PROTOCOLS\Filter\
text/html
CLSID = "{random CLSID}"
HKEY_CLASSES_ROOT\CLSID\{random CLSID}\
InProcServer32
(Default) = "%User Temp%\mstmp."
HKEY_CLASSES_ROOT\CLSID\{random CLSID}\
InProcServer32
ThreadingModel = "Apartment"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\mstmp - detected as TROJ_DLOAD.SMAD
(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.)
Other Details
This Trojan does the following:
- It monitors the following security related services in the list of running processes in memory. If it finds any, its component file, TROJ_DLOAD.SMAD, disables the found service:
- AAWService.exe
- AAWTray.exe
- ABregmon.exe
- ACAAS.exe
- ACAEGMr.exe
- ACAIS.exe
- ACALS.exe
- ACASP.exe
- ACenter.exe
- AFMain.exe
- AGB6.exe
- AGBKrnl.exe
- AGIDSUI.exe
- ALMon.exe
- ALive.exe
- ALsvc.exe
- APVXDWIN.EXE
- ARCATA~1.EXE
- AScheduleService.exe
- AVGIDSAgent.exe
- AVGIDSMonitor.exe
- AVGIDSWatcher.exe
- AVKProxy.exe
- AVKService.exe
- AVKTray.exe
- AVKWCtl.exe
- AVMenu.exe
- Ad-Aware.exe
- AhnSD.exe
- AhnSDsv.exe
- AluSchedulerSvc.exe
- ApVxdWin.exe
- ArcaBackupService.exe
- ArcaBit.Core.Configurator2.exe
- ArcaRemoteSvc.exe
- Arcabit.Core.LoggingService.exe
- BDTUpdateService.exe
- CAGlobal.exe
- CAGlobalLight.exe
- CAPPActiveProtection.exe
- CCSVCHST.EXE
- CClaw.exe
- CONSCTL.EXE
- CounterSpy.exe
- EMLPROUI.EXE
- EMLPROXY.EXE
- FAMEH32.exe
- FCH32.EXE
- FPAVServer.exe
- FProtTray.exe
- FSM32.EXE
- FSMA32.EXE
- FSMB32.exe
- FileMonSV.exe
- GDFirewallTray.exe
- GDFwSvc.exe
- GDSC.exe
- GDScan.exe
- HFACSvc.exe
- HrRes.exe
- IFace.exe
- ISWSVC.exe
- ITMRTSVC.exe
- K7EmlPxy.exe
- K7FWSrvc.exe
- K7PSSrvc.exe
- K7RTScan.exe
- K7SysMon.exe
- K7SysTry.exe
- K7TSMngr.exe
- K7TSecurity.exe
- KVMonXp.kxp
- KVSrvXP.exe
- KVXp.kxp
- MAILDISP.EXE
- MSASCui.exe
- MSProxy.ahn
- MWAGENT.EXE
- MWASER.EXE
- McNASvc.exe
- McProxy.exe
- McSACore.exe
- Mcshield.exe
- MpfSrv.exe
- MsMpEng.exe
- Nbrowser.exe
- NetMonSV.exe
- Nip.exe
- Njeeves.exe
- Nsesvc.exe
- Nvcoas.exe
- ONLINENT.EXE
- ONLNSVC.EXE
- OPSSVC.EXE
- OcHealthMon.exe
- PAVSRV51.EXE
- PPCtlPriv.exe
- PSANHost.exe
- PSHost.exe
- PSUNMain.exe
- PXAgent.exe
- PXConsole.exe
- PavBckPT.exe
- PavFnSvr.exe
- PavPrSrv.exe
- PslmSvc.exe
- QOELoader.exe
- QUHLPSVC.EXE
- RavMon.exe
- RavTask.exe
- RsTray.exe
- SAVAdminService.exe
- SBAMSvc.exe
- SBAMTray.exe
- SBCSSvc.exe
- SBCSTray.exe
- SCANMSG.EXE
- SCANWSCS.EXE
- SSU.exe
- SavService.exe
- SfCtlCom.exe
- SpIDerAgent.exe
- SpIDerMI.exe
- SpySweeper.exe
- SpySweeperUI.exe
- SpybotSD.exe
- TDWatch.exe
- TFService.exe
- THAV.EXE
- THD32.EXE
- THSM.EXE
- TMBMSRV.exe
- TRAYSSER.EXE
- TRYICOS.EXE
- TSCFCommander.exe
- TSCFPlatformCOMSvr.exe
- TeaTimer.exe
- TmPfw.exe
- TmProxy.exe
- UPSCHD.EXE
- UfNai.exe
- UfSeAgnt.exe
- UfSeAgnt.exe
- UfUpdUi.exe
- UmxAgent.exe
- UmxCfg.exe
- UmxFwHlp.exe
- UmxPol.exe
- VMwareService.exe
- VMwareTray.exe
- VMwareUser.exe
- WEBPROXY.EXE
- WRConsumerService.exe
- WinSSUI.exe
- Zanda.exe
- Zlh.exe
- a2guard.exe
- a2services.exe
- a2start.exe
- acs.exe
- arcarvir.exe
- ashDisp.exe
- ashMaiSv.exe
- ashServ.exe
- ashWebSv.exe
- aswUpdSv.exe
- avas.exe
- avcom.exe
- avesvc.exe
- avgam.exe
- avgamsvr.exe
- avgas.exe
- avgcc.exe
- avgcsrvx.exe
- avgcsrvx.exe
- avgemc.exe
- avgfws8.exe
- avgnsx.exe
- avgrsx.exe
- avgtray.exe
- avgui.exe
- avgupd.exe
- avgupsvc.exe
- avgwdsvc.exe
- avgwsvc.exe
- avinitnt.exe
- avmgma.exe
- avp.exe
- avpmapp.exe
- avtray.exe
- avwebgrd.exe
- caavguiscan.exe
- capfasem.exe
- cappactiveprotection.exe
- casc.exe
- casecuritycenter.exe
- cavrid.exe
- ccSvcHst.exe
- ccschedulersvc.exe
- cctray.exe
- cfp.exe
- cmdagent.exe
- drwebscd.exe
- dvpapi.exe
- dvprpt.exe
- econceal.exe
- econser.exe
- egui.exe
- ekrn.exe
- elogsvc.exe
- escanmon.exe
- forsp.exe
- fsaua.exe
- fsav32.exe
- fsavgui.exe
- fsdfwd.exe
- fsgk32.exe
- fsgk32st.exe
- fsguidll.exe
- fspc.exe
- fsqh.exe
- fssm32.exe
- fsus.exe
- gozer.exe
- guard.exe
- guardxkickoff.exe
- guardxservice.exe
- guardxup.exe
- hcontain.exe
- hpcsvc.exe
- hsvcmod.exe
- isafe.exe
- kavstart.exe
- kissvc.exe
- kmailmon.exe
- kpfw32.exe
- kpfwsvc.exe
- kwatch.exe
- livesrv.exe
- livesrv.exe
- mcagent.exe
- mcmscsvc.exe
- mcshell.exe
- mcsysmon.exe
- mcupdmgr.exe
- mcvsmap.exe
- mcvsshld.exe
- mdmcls32.exe
- msfwsvc.exe
- msksrver.exe
- npcsvc32.exe
- npfsvc32.exe
- npfuser.exe
- nprosec.exe
- nuaa.exe
- nvcsched.exe
- nvcsched.exe
- nvoy.exe
- op_mon.exe
- pctsAuxs.exe
- pctsGui.exe
- pctsSvc.exe
- pctsTray.exe
- prevx.exe
- psksvc.exe
- qhfw.exe
- rsnetsvr.exe
- sbamui.exe
- seccenter.exe
- seccenter.exe
- spiderml.exe
- spidernt.exe
- spidersgate.exe
- spiderui.exe
- svcprs32.exe
- symlcsvc.exe
- syssvcnt.exe
- tpcfg.exe
- tppfdmm.exe
- tptray.exe
- uiscan.exe
- untray.exe
- vba32ldr.exe
- vbcmserv.exe
- vbsystry.exe
- vetmsg.exe
- virCatch.exe
- virusutilities.exe
- vmacthlp.exe
- vrfwsock.exe
- vrfwsvc.exe
- vrmonnt.exe
- vrmonsvc.exe
- vrrepair.exe
- vrscan.exe
- vsmon.exe
- vsserv.exe
- vsserv.exe
- winss.exe li>winssnotify.exe
- xcommsvr.exe
- zlclient.exe
SOLUTION
Step 1
For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Close all opened browser windows
Step 4
Delete this registry key
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\PROTOCOLS\Filter
- text/html
- text/html
- In HKEY_CLASSES_ROOT\CLSID
- {random CLSID}
- {random CLSID}
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOAD.SMAB 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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