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Sality

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Sality is a virus with keylogging and backdoor capabilities. It may infect executable files by prepending its code to host files.[1]

It is a mix of the common known polymorphic viruses, Conficker aka Downadup and the old Nimda. It appends itself to every scf or exe file run on the machine. It spreads over USB devices, E-Mail or through the Windows Domains and Workgrups.It dislable and delete AV(Antiviruses) and delete files whit these strings:

  • _AVPM.
  • A2GUARD.
  • AAVSHIELD.
  • AVAST
  • ADVCHK.
  • AHNSD.
  • AIRDEFENSE
  • ALERTSVC
  • ALOGSERV
  • ALSVC.
  • AMON.
  • ANTI-TROJAN.
  • AVZ.
  • ANTIVIR
  • APVXDWIN.
  • ARMOR2NET.
  • ASHAVAST.
  • ASHDISP.
  • ASHENHCD.
  • ASHMAISV.
  • ASHPOPWZ.
  • ASHSERV.
  • ASHSIMPL.
  • ASHSKPCK.
  • ASHWEBSV.
  • ASWUPDSV.
  • ATCON.
  • ATUPDATER.
  • ATWATCH.
  • AVCIMAN.
  • AVCONSOL.
  • AVENGINE.
  • AVESVC.
  • AVGAMSVR.
  • AVGCC.
  • AVGCC32.
  • AVGCTRL.
  • AVGEMC.
  • AVGFWSRV.
  • AVGNT.
  • AVGNTDD
  • AVGNTMGR
  • AVGSERV.
  • AVGUARD.
  • AVGUPSVC.
  • AVINITNT.
  • AVKSERV.
  • AVKSERVICE.
  • AVKWCTL.
  • AVP.
  • AVP32.
  • AVPCC.
  • AVPM.
  • AVAST
  • AVSERVER.
  • AVSCHED32.
  • AVSYNMGR.
  • AVWUPD32.
  • AVWUPSRV.
  • AVXMONITOR9X.
  • AVXMONITORNT.
  • AVXQUAR.
  • BDMCON.
  • BDNEWS.
  • BDSUBMIT.
  • BDSWITCH.
  • BLACKD.
  • BLACKICE.
  • CAFIX.
  • CCAPP.
  • CCEVTMGR.
  • CCPROXY.
  • CCSETMGR.
  • CFIAUDIT.
  • CLAMTRAY.
  • CLAMWIN.
  • CLAW95.
  • CUREIT
  • DEFWATCH.
  • DRVIRUS.
  • DRWADINS.
  • DRWEB32W.
  • DRWEBSCD.
  • DRWEBUPW.
  • DWEBLLIO
  • DWEBIO
  • ESCANH95.
  • ESCANHNT.
  • EWIDOCTRL.
  • EZANTIVIRUSREGISTRATIONCHECK.
  • F-AGNT95.
  • FAMEH32.
  • FILEMON
  • FIRESVC.
  • FIRETRAY.
  • FIREWALL.
  • FPAVUPDM.
  • FRESHCLAM.
  • EKRN.
  • FSAV32.
  • FSAVGUI.
  • FSBWSYS.
  • F-SCHED.
  • FSDFWD.
  • FSGK32.
  • FSGK32ST.
  • FSGUIEXE.
  • FSMA32.
  • FSMB32.
  • FSPEX.
  • FSSM32.
  • F-STOPW.
  • GCASDTSERV.
  • GCASSERV.
  • GIANTANTISPYWAREMAIN.
  • GIANTANTISPYWAREUPDATER.
  • GUARDGUI.
  • GUARDNT.
  • HREGMON.
  • HRRES.
  • HSOCKPE.
  • HUPDATE.
  • IAMAPP.
  • IAMSERV.
  • ICLOAD95.
  • ICLOADNT.
  • ICMON.
  • ICSSUPPNT.
  • ICSUPP95.
  • ICSUPPNT.
  • IFACE.
  • INETUPD.
  • INOCIT.
  • INORPC.
  • INORT.
  • INOTASK.
  • INOUPTNG.
  • IOMON98.
  • ISAFE.
  • ISATRAY.
  • ISRV95.
  • ISSVC.
  • KAV.
  • KAVMM.
  • KAVPF.
  • KAVPFW.
  • KAVSTART.
  • KAVSVC.
  • KAVSVCUI.
  • KMAILMON.
  • KPFWSVC.
  • MCAGENT.
  • MCMNHDLR.
  • MCREGWIZ.
  • MCUPDATE.
  • MCVSSHLD.
  • MINILOG.
  • MYAGTSVC.
  • MYAGTTRY.
  • NAVAPSVC.
  • NAVAPW32.
  • NAVLU32.
  • NAVW32.
  • NEOWATCHLOG.
  • NEOWATCHTRAY.
  • NISSERV
  • NISUM.
  • NMAIN.
  • NOD32
  • NORMIST.
  • NOTSTART.
  • NPAVTRAY.
  • NPFMNTOR.
  • NPFMSG.
  • NPROTECT.
  • NSCHED32.
  • NSMDTR.
  • NSSSERV.
  • NSSTRAY.
  • NTRTSCAN.
  • NTOS.
  • NTXCONFIG.
  • NUPGRADE.
  • NVCOD.
  • NVCTE.
  • NVCUT.
  • NWSERVICE.
  • OFCPFWSVC.
  • OUTPOST
  • OP_MON.
  • PAVFIRES.
  • PAVFNSVR.
  • PAVKRE.
  • PAVPROT.
  • PAVPROXY.
  • PAVPRSRV.
  • PAVSRV51.
  • PAVSS.
  • PCCGUIDE.
  • PCCIOMON.
  • PCCNTMON.
  • PCCPFW.
  • PCCTLCOM.
  • PCTAV.
  • PERSFW.
  • PERTSK.
  • PERVAC.
  • PNMSRV.
  • POP3TRAP.
  • POPROXY.
  • PREVSRV.
  • PSIMSVC.
  • QHONLINE.
  • QHONSVC.
  • QHWSCSVC.
  • RAVMON.
  • RAVTIMER.
  • AVGNT
  • AVCENTER.
  • RFWMAIN.
  • RTVSCAN.
  • RTVSCN95.
  • RULAUNCH.
  • SALITY
  • SAVADMINSERVICE.
  • SAVMAIN.
  • SAVPROGRESS.
  • SAVSCAN.
  • SCANNINGPROCESS.
  • SDRA64.
  • SDHELP.
  • SHSTAT.
  • SITECLI.
  • SPBBCSVC.
  • SPHINX.
  • SPIDERCPL.
  • SPIDERML.
  • SPIDERNT.
  • SPIDERUI.
  • SPYBOTSD.
  • SPYXX.
  • SS3EDIT.
  • STOPSIGNAV.
  • SWAGENT.
  • SWDOCTOR.
  • SWNETSUP.
  • SYMLCSVC.
  • SYMPROXYSVC.
  • SYMSPORT.
  • SYMWSC.
  • SYNMGR.
  • TAUMON.
  • TBMON.
  • AVAST
  • TMLISTEN.
  • TMNTSRV.
  • TMPFW.
  • TMPROXY.
  • TNBUTIL.
  • TRJSCAN.
  • UP2DATE.
  • VBA32ECM.
  • VBA32IFS.
  • VBA32LDR.
  • VBA32PP3.
  • VBSNTW.
  • VCRMON.
  • VPTRAY.
  • VRFWSVC.
  • VRMONNT.
  • VRMONSVC.
  • VRRW32.
  • VSECOMR.
  • VSHWIN32.
  • VSMON.
  • VSSERV.
  • VSSTAT.
  • WATCHDOG.
  • WEBSCANX.
  • WEBTRAP.
  • WGFE95.
  • WINAW32.
  • WINROUTE.
  • WINSS.
  • WINSSNOTIFY.
  • WRCTRL.
  • XCOMMSVR.
  • ZAUINST
  • ZLCLIENT
  • ZONEALARM

Installation

Sality.AT drops a device driver as the following:

%SystemRoot%\system32\drivers\amsint32.sys

The amsint32.sys is detected as Trojan:WinNT/Sality.It creates a service named amsint.Sality.AT communicates with the driver component to restore the system service descriptor table (SSDT).

Payloads

Prevents Safe Mode  by deleting these registry subkeys under:

  • HKLM\System\CurrentControlSet\Control\SafeBoot
  • HKCU\System\CurrentControlSet\Control\SafeBoot

Prevents Firewall, Antivirus and it reinfects cured files whit SalityKiller.

Sality kills processes that have following modules loaded:

  • DWEBLLIO
  • DWEBIO

In subkey HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system the virus disables regedit.exe by setting the value "DisableRegistryTools" to "1" and changes the registry to prevent viewing files with hidden attributes, by setting the value "Hidden" to "2" (in subkey HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer).

Sality.AT tries to download files from remote servers to the local drive, then decrypts and runs the downloaded files. We have observed the virus to connect to the following servers:

  • www.klkjwre9fqwieluoi.info
  • kukutrustnet777888.info
  • klkjwre77638dfqwieuoi888.info
  • 89.119.67.154
  • kukutrustnet777.info
  • kukutrustnet888.info
  • kukutrustnet987.info

The downloaded viruses are:

See also

References

External links

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