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.
Security programs use generic detections that look for broad patterns of code or behavior to identify similar programs or files. If you suspect the file was incorrectly detected, go to: Removal: Suspect a file is incorrectly detected (a False Positive)?.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
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
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