Threat Description

Rootkit:​W32/Xanti.gen!A

Details

Aliases: Rootkit:​W32/Xanti.gen!A
Category: Malware
Type: Rootkit
Platform: W32

Summary



A program or set of programs which hides itself by subverting or evading the computer's security mechanisms, then allows remote users to secretly control the computer's operating system.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Rootkit:W32/Xanti.gen!A is a Generic Detection that identifies malware attempting to create a device file on the computer named \Device\Beep.

About Generic Detections

Unlike signature or single-file detections, a Generic Detection does not identify a unique or individual malicious program. Instead, a Generic Detection looks for broadly applicable code or behavior characteristics that indicate a file as potentially malicious, so that a single Generic Detection can efficiently identify dozens, or even hundreds of malware. InstallationIf the malware manages to run, it will create the following files:

  • \SystemRoot\system32\cru629.dat
  • \SystemRoot\cru629.dat
  • \SystemRoot\system32\braviax.exe
  • \SystemRoot\braviax.exe

The malware may also drop additional malicious programs onto the system:

  • cru629.dat - Detected by Backdoor.Win32.Small.cbo, Trojan.Agent.AIER
  • braviax.exe - Detected by Trojan-Clicker.Win32.Delf.akw, Trojan.Crypt.EQ

When one of the following processes are executed:

  • winlogon.exe
  • svchost.exe
  • smss.exe
  • csrss.exe

The malware will create the following launchpoints in the Windows Registry:

  • HKLM\Software\Microsoft\Windows NT\CurrentVersion\Windows Appinit_dlls = "cru629.dat"
  • HKLM\Software\Microsoft\Windows\CurrentVersion\Run braviax = "braviax.exe"

It also places hook to NtQuerySystemInformation.

Activity

Once installed, the malware monitors the following processes/drivers and prevents them from running:

  • spdt.sys
  • gmer.sys
  • taskmon.sys
  • kernelw.sys
  • wowfx.dll
  • pctfw2.sys
  • symtdi.sys
  • symevent.sys
  • fltmgr.sys
  • bmbemuhl
  • ip6fw.sys
  • fmtr.sys
  • sdhelper.dll
  • wincom32.sys
  • rdriv.sys
  • mpfirewall.sys
  • sandbox.sys
  • filtnt.sys
  • bc_tdi_f.sys
  • bc_prt_f.sys
  • bc_pat_f.sys
  • bc_ngn.sys
  • bc_ip_f.sys
  • bc_hassh_f.sys
  • bcftdi.sys
  • bcfilter.sys
  • watchdog.sys
  • vsdatant.sys
  • kmd.exe
  • winavxx.exe
  • bolenjx.exe
  • bolenja.exe
  • rootkit_detektive.exe
  • autoruns.exe
  • vundofix.exe
  • trjscan.exe
  • tpsrv.exe
  • thguard.exe
  • symwsc.exe
  • superantispyware.exe
  • spyblock.dll
  • spbbcsvc.exe
  • sndsrvc.exe
  • sndmon.exe
  • sdtrayapp.exe
  • sbserv.exe
  • pskmssvc.exe
  • psimsvc.exe
  • pshost.exe
  • psctrls.exe
  • pifsvc.exe
  • pavsrv51.exe
  • pavprsrv.exe
  • lucoms~1.exe
  • lsetup.exe
  • ccsvchst.exe
  • ccproxy.exe
  • avengine.exe
  • avciman.exe
  • ashwebsv.exe
  • ashserv.exe
  • ashmaisv.exe
  • apvxdwin.exe
  • appsvc32.exe
  • aluschedulersvc.exe
  • gmer.exe
  • killbox.exe
  • avgupsvc.exe
  • avgamsvr.exe
  • avgw.exe
  • avgcc.exe
  • msmpeng.exe
  • printer.exe
  • svcntaux.exe
  • swdsvc.exe
  • avgas.exe
  • symlcsvc.exe
  • fwservice.exe
  • prevxcsi.exe
  • navilog
  • navapsvc.exe
  • globkill.exe
  • dss.exe
  • procmast.exe
  • combo.exe
  • defwatch.exe
  • ccsetmgr.exe
  • ccpwdsvc.exe
  • sdfix.exe
  • zcomservice.exe
  • zcodec.exe
  • zclient.exe
  • spywaredetector.exe
  • spybotsd.exe
  • spybot.exe
  • savscan.exe
  • sandboxieserver.exe
  • rtvscan.exe
  • pboptions.exe
  • pbcpl.exe
  • pavfnsvr.exe
  • overspy.exe
  • overseer.exe
  • op_mon.exe
  • outpost.exe
  • ofcdog.exe
  • nvctrl.exe
  • nsmdtr.exe
  • nortonupdate.exe
  • nod32ra.exe
  • nod32krn.exe
  • no32mon.exe
  • nlsupervisorpro.exe
  • njexplor.exe
  • nisum.exe
  • navw32.exe
  • navstub.exe
  • navapp.exe
  • myvideodaily2.exe
  • mwsoemon.exe
  • msssrv.exe
  • mcshield.exe
  • malswep.exe
  • malscr.exe
  • magiclink.exe
  • lsass32.exe
  • lsasrv.exe
  • livesrv.exe
  • little_helper2.exe
  • kpf4ss.exe
  • klswd.exe
  • klpf.exe
  • kavsvc.exe
  • kavss.exe
  • kav.exe
  • issvc.exe
  • isnotify.exe
  • ismini.exe
  • inetupd.exe
  • icmon.exe
  • iao.exe
  • hwpe2.exe
  • hitvirus.exe
  • hijackthis
  • hbtoeaddon.exe
  • hackmon.exe
  • gcasserv.exe
  • gcasdtserv.exe
  • fsm32.exe
  • fsbl.exe
  • fsav32.exe
  • fatbuster.exe
  • farsighter.exe
  • f-stopw.exe
  • f-sched.exe
  • eyetidecontroller.exe
  • dsentry.exe
  • cureit.exe
  • crypserv.exe
  • cpf.exe
  • cpd.exe
  • comboxfix.exe
  • combofix
  • ccpxysvc.exe
  • ccimscan.exe
  • ccevtmgr.exe
  • ccapp.exe
  • cavtray.exe
  • cavrid.exe
  • bdss.exe
  • bdmcon.exe
  • avz.exe
  • avsched32.exe
  • avpm.exe
  • avp.exe
  • avpcc.exe
  • avgemc.exe
  • avgagent.exe





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