TROJ_DLOADR.ATT
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan may arrive as a file that exports functions used by other malware.
It is injected into all running processes to remain memory resident.
It opens a hidden Internet Explorer window. It requires its main component to successfully perform its intended routine.
TECHNICAL DETAILS
21,629 bytes
DLL
Yes
31 Mar 2011
Opens Internet Explorer window, Terminates processes, Downloads files
Arrival Details
This Trojan may arrive as a file that exports functions used by other malware.
Installation
This Trojan 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\UIEI
Backdoor Routine
As of this writing, the said sites are inaccessible.
Other Details
This Trojan opens a hidden Internet Explorer window.
It requires its main component to successfully perform its intended routine.
It attempts to access the following websites to download files, which are possibly malicious:
- http://www.{BLOCKED}ies.com/photo/{random}.php?{random}
- http://www.{BLOCKED}edia.com/photo/{random}.php?{random}
- http://{BLOCKED}8.{BLOCKED}0.7.152/photo/{random}.php?{random}
NOTES:
It terminates the following antivirus-related processes if found running in memory:
- ACAAS.exe
- ACAEGMr.exe
- ACAIS.exe
- ACALS.exe
- ACASP.exe
- AFMain.exe
- AGIDSUI.exe
- ALMon.exe
- ALsvc.exe
- APVXDWIN.EXE
- AVGIDSAgent.exe
- AVGIDSMonitor.exe
- AVGIDSWatcher.exe
- AhnSD.exe
- AhnSDsv.exe
- AluSchedulerSvc.exe
- ApVxdWin.exe
- CAGlobal.exe
- CAGlobalLight.exe
- CAPPActiveProtection.exe
- CCSVCHST.EXE
- CClaw.exe
- CounterSpy.exe
- EMLPROUI.EXE
- EMLPROXY.EXE
- FAMEH32.exe
- FCH32.EXE
- FPAVServer.exe
- FProtTray.exe
- FSM32.EXE
- FSMA32.EXE
- FSMB32.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
- MSASCui.exe
- MSProxy.ahn
- McNASvc.exe
- McProxy.ex
- McSACore.exe
- Mcshield.exe
- MpfSrv.exe
- MsMpEng.exe
- Nbrowser.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
- SBCSSvc.exe
- SBCSTray.exe
- SCANMSG.EXE
- SCANWSCS.EXE
- SavService.exe
- SfCtlCom.exe
- SpIDerAgent.exe
- SpIDerMI.exe
- TMBMSRV.exe
- TRAYSSER.EXE
- TSCFCommander.exe
- TSCFPlatformCOMSvr.exe
- TmPfw.exe
- TmProxy.exe
- UPSCHD.EXE
- UfNai.exe
- UfSeAgnt.exe
- UfUpdUi.exe
- UmxAgent.exe
- UmxCfg.exe
- UmxFwHlp.exe
- UmxPol.exe
- WEBPROXY.EXE
- WinSSUI.exe
- Zanda.exe
- Zlh.exe
- acs.exe
- ashDisp.exe
- ashMaiSv.exe
- ashServ.exe
- ashWebSv.exe
- aswUpdSv.exe
- avesvc.exe
- avgam.exe
- avgamsvr.exe
- avgas.exe
- avgcc.exe
- avgcsrvx.exe
- avgemc.exe
- avgfws8.exe
- avgnsx.exe
- avgrsx.exe
- avgtray.exe
- avgupd.exe
- avgupsvc.exe
- avgwdsvc.exe
- avgwsvc.exe
- avp.exe
- avpmapp.exe
- avwebgrd.exe
- caavguiscan.exe
- capfasem.exe
- cappactiveprotection.exe
- casc.exe
- casecuritycenter.exe
- cavrid.exe
- ccSvcHst.exe
- ccschedulersvc.exe
- cctray.exe
- drwebscd.exe
- egui.exe
- ekrn.exe
- elogsvc.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
- guard.exe
- guardxkickoff.exe
- guardxservice.exe
- guardxup.exe
- hcontain.exe
- hpcsvc.exe
- hsvcmod.exe
- isafe.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
- nvoy.exe
- op_mon.exe
- prevx.exe
- psksvc.exe
- qhfw.exe
- rsnetsvr.exe
- seccenter.exe
- spiderml.exe
- spidernt.exe
- spidersgate.exe
- spiderui.exe
- svcprs32.exe
- symlcsvc.exe
- vba32ldr.exe
- vbcmserv.exe
- vbsystry.exe
- vetmsg.exe
- virCatch.exe
- virusutilities.exe
- vrfwsock.exe
- vrfwsvc.exe
- vrmonnt.exe
- vrmonsvc.exe
- vrrepair.exe
- vrscan.exe
- vsmon.exe
- vsserv.exe
- winss.exe
- winssnotify.exe
- xcommsvr.exe
- zlclient.exe
It does not have backdoor capabilities.
It does not have rootkit capabilities.
SOLUTION
8.900
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Scan your computer with your Trend Micro product and note files detected as TROJ_DLOADR.ATT
Step 3
Restart in Safe Mode
Step 4
Search and delete the file detected as TROJ_DLOADR.ATT
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLOADR.ATT. 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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