Home > Threat descriptions >

Rootkit:W32/Xanti.gen!A

Classification

Category: Malware

Type: Rootkit

Aliases: Rootkit:W32/Xanti.gen!A

Summary


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

Generic detections are broad patterns of code or behavior that are used by security software to identify programs or files. If you suspect the detected file was incorrectly identified, go to: Removal: Resolve a False Positive.

Removal


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

Resolve a False Positive

Security programs will sometimes unintentionally identify a clean program or file as malicious if its code or behavior is similar to a known harmful program or file. This is known as a False Positive. In most cases, a False Positive is fixed in a subsequent database release. If you suspect the detected file is a False Positive, you can:

Knowledge Base

Find the latest advice in our Community Knowledge Base.

About the product

See the manual for your F-Secure product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details


Installation

If 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