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  4. Email-Worm:W32/Bagle.HR

Email-Worm:W32/Bagle.HR

Name : Email-Worm:W32/Bagle.HR
Detection Names : Trojan-Downloader.Win32.Bagle.dr, Email-Worm.Win32.Bagle.dr
Category:Malware
Type:Email-Worm
Type:Trojan-Downloader
Platform:W32
Date of Discovery:April 08, 2007

Summary

This type of worm is embedded in an e-mail attachment, and spreads using the infected computer's e-mailing networks.

Disinfection

Special Disinfection Tool

F-Secure has developed a special disinfection tool for this worm. The tool will detect and remove an active Bagle infection from the computer.

T

he Bagle removal tool can be downloaded in a ZIP file from:

  • http://www.f-secure.com/tools/f-bagle.zip
  • ftp://ftp.f-secure.com/anti-virus/tools/f-bagle.zip

The unpacked version is available from:
  • http://www.f-secure.com/tools/f-bagle.exe
  • ftp://ftp.f-secure.com/anti-virus/tools/f-bagle.exe
  • http://www.f-secure.com/tools/f-bagle.txt
  • ftp://ftp.f-secure.com/anti-virus/tools/f-bagle.txt

System administrators who are using F-Secure Policy Manager, can distribute the F-BAGLE tool as a JAR package automatically to all workstations. The package can be downloaded from:

  • ftp://ftp.f-secure.com/anti-virus/tools/f-bagle.jar

Manual Disinfection

Manual disinfection of Bagle consists of the following steps:

  • Delete the registry value [HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\d3dupdate.exe] and restart the computer

OR

  • Terminate the running 'bbeagle.exe' process with Task Manager
  • Then delete the worm's executable file from the Windows System Directory (%SysDir%\bbeagle.exe).

    • Remote Removal

    F-Secure can confirm that the remote removal method found by Joe Stewart of Lurhq does indeed work.

    Please note that the usage of this method against someone else's computers may be legally questionable.

    Sending a specific byte sequence to port 6777 on the infected computers causes the worm to delete itself from the System Directory and terminate its process. The registry values are not removed but since the file does not exist Windows will ignore those.

    The byte sequence to be sent:

    • 0x43 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x04 0x31 0x32 0x00

    Additional Details

    Email-Worm:W32/Bagle.HR differs from previous Bagle variants in that it is itself capable of functioning as a trojan-downloader, rather than depending on a separate trojan-downloader program.

    In addition, the worm uses rootkit technology to disguise its presence on the computer.


    Execution

    Upon executing for the first time, Bagle.HR it shows the following dialog box as a decoy:

    It will display the same message regardless of the file chosen.

    In order to check itself for first execution, Bagle.HR checks the following registry entry:

    •  HKEY_CURRENT_USER\Software\FirstRRRun
        FirstRR23232Run = dword:00000001

    If the said registry entry is available it will no longer show the dialog box.

    Bagle.HR drops copies of itself in the following path and filename:

    •  %Local AppData folder%\hidires\flec003.exe
    • %Local AppData folder%\hidires\hidr.exe

    It also drops the following rootkit driver to hide its malicious activities:

    •  %Local AppData folder%\hidires\m_hook.sys

    To enable automatic execution upon boot, it adds the following auto start entry but waits for 300000 ms before adding it:

    •  HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
         drvsyskit = %Local AppData folder%\hidires\hidr.exe

    It also adds its rootkit driver component as a service by adding the following changes to the registry:

    •  HKLM\SYSTEM\CurrentControlSet\Services\m_hook
         Type = dword:00000001
         Start = dword:00000004
         DisplayName = "Empty"
         ImagePath = %Local Application Data Folder%\hidires\m_hook.sys

    Bagle.HR deletes the following key in order to prevent the user from booting into safe mode:

    •  HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot

    Activity

    Bagle.HR downloads other malware from the following links:

    •  http://5050clothing.com/mu[REMOVED].php
    • http://axelero.hu/mu[REMOVED].php
    • http://calamarco.com/mu[REMOVED].php
    • http://charlesspaans.com/mu[REMOVED].php
    • http://chatsk.wz.cz/mu[REMOVED].php
    • http://checkalertusa.com/mu[REMOVED].php
    • http://cibernegocios.com.ar/mu[REMOVED].php
    • http://cof666.shockonline.net/mu[REMOVED].php
    • http://comaxtechnologies.net/mu[REMOVED].php
    • http://concellodesandias.com/mu[REMOVED].php
    • http://dev.jintek.com/mu[REMOVED].php
    • http://dogoodesign.ch/mu[REMOVED].php
    • http://donchef.com/mu[REMOVED].php
    • http://erich-kaestner-schule-donaueschingen.de/mu[REMOVED].php
    • http://foxvcoin.com/mu[REMOVED].php
    • http://grupdogus.de/mu[REMOVED].php
    • http://hotchillishop.de/mu[REMOVED].php
    • http://ilikesimple.com/mu[REMOVED].php
    • http://innovation.ojom.net/mu[REMOVED].php
    • http://kisalfold.com/mu[REMOVED].php
    • http://knickimbit.de/mu[REMOVED].php
    • http://kremz.ru/mu[REMOVED].php
    • http://massgroup.de/mu[REMOVED].php
    • http://poliklinika-vajnorska.sk/mu[REMOVED].php
    • http://svatba.viskot.cz/mu[REMOVED].php
    • http://systemforex.de/mu[REMOVED].php
    • http://uwua132.org/mu[REMOVED].php
    • http://v-v-kopretiny.ic.cz/mu[REMOVED].php
    • http://vanvakfi.com/mu[REMOVED].php
    • http://vega-sps.com/mu[REMOVED].php
    • http://vidus.ru/mu[REMOVED].php
    • http://viralstrategies.com/mu[REMOVED].php
    • http://Vivamodelhobby.com/mu[REMOVED].php
    • http://vkinfotech.com/mu[REMOVED].php
    • http://vproinc.com/mu[REMOVED].php
    • http://vytukas.com/mu[REMOVED].php
    • http://waisenhaus-kenya.ch/mu[REMOVED].php
    • http://watsrisuphan.org/mu[REMOVED].php
    • http://wbecanada.com/mu[REMOVED].php
    • http://web-comp.hu/mu[REMOVED].php
    • http://webfull.com/mu[REMOVED].php
    • http://welvo.com/mu[REMOVED].php
    • http://wvpilots.org/mu[REMOVED].php
    • http://www.ag.ohio-state.edu/mu[REMOVED].php
    • http://www.ag.ohio-state.edu/mu[REMOVED].php
    • http://www.chapisteriadaniel.com/mu[REMOVED].php
    • http://www.chittychat.com/mu[REMOVED].php
    • http://www.cort.ru/mu[REMOVED].php
    • http://www.crfj.com/mu[REMOVED].php
    • http://www.kersten.de/mu[REMOVED].php
    • http://www.kljbwadersloh.de/mu[REMOVED].php
    • http://www.voov.de/mu[REMOVED].php
    • http://www.walsch.de/mu[REMOVED].php
    • http://www.wchat.cz/mu[REMOVED].php
    • http://www.wg-aufbau-bautzen.de/mu[REMOVED].php
    • http://www.wzhuate.com/mu[REMOVED].php
    • http://xotravel.ru/mu[REMOVED].php
    • http://yeniguntugla.com/mu[REMOVED].php
    • http://zebrachina.net/mu[REMOVED].php
    • http://zsnabreznaknm.sk/mu[REMOVED].php

    The rootkit driver terminates and deletes the following files that are related to antivirus software:

    •  _AVP32.EXE
    • _AVPCC.EXE
    • _AVPM.EXE
    • a2guard.exe
    • aavshield.exe
    • AckWin32.exe
    • ADVCHK.EXE
    • AhnSD.exe
    • airdefense.exe
    • ALERTSVC.EXE
    • ALMon.exe
    • ALOGSERV.EXE
    • ALsvc.exe
    • amon.exe
    • Anti-Trojan.exe
    • AntiVirScheduler
    • AntiVirService
    • ANTS.EXE
    • APVXDWIN.EXE
    • Armor2net.exe
    • ashAvast.exe
    • ashDisp.exe
    • ashEnhcd.exe
    • ashMaiSv.exe
    • ashPopWz.exe
    • ashServ.exe
    • ashSimpl.exe
    • ashSkPck.exe
    • ashWebSv.exe
    • aswUpdSv.exe
    • ATCON.EXE
    • ATUPDATER.EXE
    • ATWATCH.EXE
    • AUPDATE.EXE
    • AUTODOWN.EXE
    • AUTOTRACE.EXE
    • AUTOUPDATE.EXE
    • avciman.exe
    • Avconsol.exe
    • AVENGINE.EXE
    • avgamsvr.exe
    • avgcc.exe
    • AVGCC32.EXE
    • AVGCTRL.EXE
    • avgemc.exe
    • avgfwsrv.exe
    • AVGNT.EXE
    • avgntdd
    • avgntmgr
    • AVGSERV.EXE
    • AVGUARD.EXE
    • avgupsvc.exe
    • avinitnt.exe
    • AvkServ.exe
    • AVKService.exe
    • AVKWCtl.exe
    • AVP.EXE
    • AVP32.EXE
    • avpcc.exe
    • avpm.exe
    • AVPUPD.EXE
    • AVSCHED32.EXE
    • avsynmgr.exe
    • AVWUPD32.EXE
    • AVWUPSRV.EXE
    • AVXMONITOR9X.EXE
    • AVXMONITORNT.EXE
    • AVXQUAR.EXE
    • BackWeb-4476822.exe
    • bdmcon.exe
    • bdnews.exe
    • bdoesrv.exe
    • bdss.exe
    • bdsubmit.exe
    • bdswitch.exe
    • blackd.exe
    • blackice.exe
    • cafix.exe
    • ccApp.exe
    • ccEvtMgr.exe
    • ccProxy.exe
    • ccSetMgr.exe
    • CFIAUDIT.EXE
    • ClamTray.exe
    • ClamWin.exe
    • Claw95.exe
    • Claw95cf.exe
    • cleaner.exe
    • cleaner3.exe
    • CliSvc.exe
    • CMGrdian.exe
    • cpd.exe
    • DefWatch.exe
    • DOORS.EXE
    • DrVirus.exe
    • drwadins.exe
    • drweb32w.exe
    • drwebscd.exe
    • DRWEBUPW.EXE
    • ESCANH95.EXE
    • ESCANHNT.EXE
    • ewidoctrl.exe
    • EzAntivirusRegistrationCheck.exe
    • F-AGNT95.EXE
    • F-PROT95.EXE
    • F-Sched.exe
    • F-StopW.EXE
    • FAMEH32.EXE
    • FAST.EXE
    • FCH32.EXE
    • FireSvc.exe
    • FireTray.exe
    • FIREWALL.EXE
    • fpavupdm.exe
    • freshclam.exe
    • FRW.EXE
    • fsav32.exe
    • fsavgui.exe
    • fsbwsys.exe
    • fsdfwd.exe
    • FSGK32.EXE
    • fsgk32st.exe
    • fsguiexe.exe
    • FSM32.EXE
    • FSMA32.EXE
    • FSMB32.EXE
    • fspex.exe
    • fssm32.exe
    • gcasDtServ.exe
    • gcasServ.exe
    • GIANTAntiSpywareMain.exe
    • GIANTAntiSpywareUpdater.exe
    • GUARD.EXE
    • GUARDGUI.EXE
    • GuardNT.exe
    • HRegMon.exe
    • Hrres.exe
    • HSockPE.exe
    • HUpdate.EXE
    • iamapp.exe
    • iamserv.exe
    • ICLOAD95.EXE
    • ICLOADNT.EXE
    • ICMON.EXE
    • ICSSUPPNT.EXE
    • ICSUPP95.EXE
    • ICSUPPNT.EXE
    • IFACE.EXE
    • INETUPD.EXE
    • InocIT.exe
    • InoRpc.exe
    • InoRT.exe
    • InoTask.exe
    • InoUpTNG.exe
    • IOMON98.EXE
    • isafe.exe
    • ISATRAY.EXE
    • ISRV95.EXE
    • ISSVC.exe
    • JEDI.EXE
    • KAV.exe
    • kavmm.exe
    • KAVPF.exe
    • KavPFW.exe
    • KAVStart.exe
    • KAVSvc.exe
    • KAVSvcUI.EXE
    • KMailMon.EXE
    • KPfwSvc.EXE
    • KWatch.EXE
    • livesrv.exe
    • LOCKDOWN2000.EXE
    • LogWatNT.exe
    • lpfw.exe
    • LUALL.EXE
    • LUCOMSERVER.EXE
    • Luupdate.exe
    • MCAGENT.EXE
    • mcmnhdlr.exe
    • mcregwiz.exe
    • Mcshield.exe
    • MCUPDATE.EXE
    • mcvsshld.exe
    • MINILOG.EXE
    • MONITOR.EXE
    • MonSysNT.exe
    • MOOLIVE.EXE
    • MpEng.exe
    • mpssvc.exe
    • MSMPSVC.exe
    • myAgtSvc.exe
    • myagttry.exe
    • navapsvc.exe
    • NAVAPW32.EXE
    • NavLu32.exe
    • NAVW32.EXE
    • NDD32.EXE
    • NeoWatchLog.exe
    • NeoWatchTray.exe
    • NISSERV
    • NISUM.EXE
    • NMAIN.EXE
    • nod32.exe
    • nod32krn.exe
    • nod32kui.exe
    • NORMIST.EXE
    • notstart.exe
    • npavtray.exe
    • NPFMNTOR.EXE
    • npfmsg.exe
    • NPROTECT.EXE
    • NSCHED32.EXE
    • NSMdtr.exe
    • NssServ.exe
    • NssTray.exe
    • ntrtscan.exe
    • NTXconfig.exe
    • NUPGRADE.EXE
    • NVC95.EXE
    • Nvcod.exe
    • Nvcte.exe
    • Nvcut.exe
    • NWService.exe
    • OfcPfwSvc.exe
    • OUTPOST.EXE
    • PAV.EXE
    • PavFires.exe
    • PavFnSvr.exe
    • Pavkre.exe
    • PavProt.exe
    • pavProxy.exe
    • pavprsrv.exe
    • pavsrv51.exe
    • PAVSS.EXE
    • pccguide.exe
    • PCCIOMON.EXE
    • pccntmon.exe
    • PCCPFW.exe
    • PcCtlCom.exe
    • PCTAV.exe
    • PERSFW.EXE
    • pertsk.exe
    • PERVAC.EXE
    • PNMSRV.EXE
    • POP3TRAP.EXE
    • POPROXY.EXE
    • prevsrv.exe
    • PsImSvc.exe
    • QHM32.EXE
    • QHONLINE.EXE
    • QHONSVC.EXE
    • QHPF.EXE
    • qhwscsvc.exe
    • RavMon.exe
    • RavTimer.exe
    • Realmon.exe
    • REALMON95.EXE
    • Rescue.exe
    • rfwmain.exe
    • Rtvscan.exe
    • RTVSCN95.EXE
    • RuLaunch.exe
    • SAVAdminService.exe
    • SAVMain.exe
    • savprogress.exe
    • SAVScan.exe
    • SCAN32.EXE
    • ScanningProcess.exe
    • sched.exe
    • sdhelp.exe
    • SERVIC~1.EXE
    • SHSTAT.EXE
    • SiteCli.exe
    • smc.exe
    • SNDSrvc.exe
    • SPBBCSvc.exe
    • SPHINX.EXE
    • spiderml.exe
    • spidernt.exe
    • Spiderui.exe
    • SpybotSD.exe
    • SPYXX.EXE
    • SS3EDIT.EXE
    • stopsignav.exe
    • swAgent.exe
    • swdoctor.exe
    • SWNETSUP.EXE
    • symlcsvc.exe
    • SymProxySvc.exe
    • SymSPort.exe
    • SymWSC.exe
    • SYNMGR.EXE
    • TAUMON.EXE
    • TBMon.exe
    • TC.EXE
    • tca.exe
    • TCM.EXE
    • TDS-3.EXE
    • TeaTimer.exe
    • TFAK.EXE
    • THAV.EXE
    • THSM.EXE
    • Tmas.exe
    • tmlisten.exe
    • Tmntsrv.exe
    • TmPfw.exe
    • tmproxy.exe
    • TNBUtil.exe
    • TRJSCAN.EXE
    • Up2Date.exe
    • UPDATE.EXE
    • UpdaterUI.exe
    • upgrepl.exe
    • Vba32ECM.exe
    • Vba32ifs.exe
    • vba32ldr.exe
    • Vba32PP3.exe
    • VBSNTW.exe
    • vchk.exe
    • vcrmon.exe
    • VetTray.exe
    • VirusKeeper.exe
    • VPTRAY.EXE
    • vrfwsvc.exe
    • VRMONNT.EXE
    • vrmonsvc.exe
    • vrrw32.exe
    • VSECOMR.EXE
    • Vshwin32.exe
    • vsmon.exe
    • vsserv.exe
    • VsStat.exe
    • WATCHDOG.EXE
    • WebProxy.exe
    • Webscanx.exe
    • WEBTRAP.EXE
    • WGFE95.EXE
    • Winaw32.exe
    • winroute.exe
    • winss.exe
    • winssnotify.exe
    • WRADMIN.EXE
    • WRCTRL.EXE
    • xcommsvr.exe
    • zatutor.exe
    • ZAUINST.EXE
    • zlclient.exe
    • zonealarm.exe