Threat Description

Backdoor: W32/Hupigon.EMV

Details

Category: Malware
Type: Backdoor
Platform: W32
Aliases: Backdoor.Win32.Hupigon.emv

Summary


A backdoor is a Remote Administration Tools (RAT) that expose infected machines to external control via the Internet by remote attackers.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

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Technical Details


This backdoor is detected as a member of the Hupigon family. the Backdoor:W32/Hupigon description provides additional details.Copies itself to:

  • %Windows%\dllhost.exe
  • %Windows%\setuprs1.PIF

Replicates these original Windows applications with an additional "EXE" extension:

  • %Windows%\system32\cmd.exe to %Windows%\system32\cmd.exe.exe
  • %Windows%\regedit.exe to %Windows%\regedit.exe.exe

Hupigon.EMV attempts to disable/redirect Windows applications using the following registry entries:

  • HKLM\Software\Microsoft\Windows NT\ CurrentVersion\Image File Execution Options\cmd.exe Debugger = setuprs1.PIF
  • HKLM\Software\Microsoft\Windows NT\ CurrentVersion\Image File Execution Options\regedit.exe Debugger = setuprs1.PIF
  • HKLM\Software\Microsoft\Windows NT\ CurrentVersion\Image File Execution Options\regedt32.exe Debugger = setuprs1.PIF
  • HKLM\Software\Microsoft\Windows NT\ CurrentVersion\Image File Execution Options\msconfig.exe Debugger = 7303.PIF

Registers itself as Windows COM+ System Application service using these registry entries:

  • HKLM\System\CurrentControlSet\Services\COMSystemApp Type = 00000110
  • HKLM\System\CurrentControlSet\Services\COMSystemApp ErrorControl = 00000000
  • HKLM\System\CurrentControlSet\Services\COMSystemApp ImagePath = C:\WINDOWS\dllhost.exe -netsvcs
  • HKLM\System\CurrentControlSet\Services\COMSystemApp DisplayName = COM+ System Applications

Attempts to locate and terminate the following process:

  • 360tray.exe
  • autoruns.exe
  • avp.exe
  • avpcc.exe
  • cpf.exe
  • ewido.exe
  • FireTray.exe
  • FireWall.exe
  • FYFireWall.exe
  • jpf.exe
  • kav.exe
  • KAVPF.exe
  • KavPFW.EXE
  • kpf4gui.exe
  • KPFW32.EXE
  • KVCenter.kxp
  • KvMonXP.kxp
  • KVXP.kxp
  • McAfeeFire.exe
  • mmc.exe
  • outpost.exe
  • PFW.exe
  • procexp.exe
  • Ras.exe
  • RfwMain.EXE
  • RRfwMain.EXE
  • runiep.exe
  • ssgui.exe
  • SysSafe.exe
  • TrojDie.kxp
  • WoptiProcess.exe

Attempts to close windows containing these strings:

  • ZoneAlarm
  • ZoneAlarm Pro

Attempts to connect to 218.16.138.64 on TCP port 81.

Propagation

It attempts to propagate by creating "\runauto..\autorun.pif" and "\autorun.inf" on all available drives, including removable drives.The autorun.inf file is detected as Worm.Win32.AutoRun.dms.The autorun.inf appears as:

  • [AutoRun] open=RUNAUT~1\autorun.pif shell\1=´ò¿ª(&O) shell\1\Command=RUNAUT~1\autorun.pif shell\2\=ä¯ÀÀ(&B) shell\2\Command=RUNAUT~1\autorun.pif shellexecute=RUNAUT~1\autorun.pif

To make sure it will only run once, the mutex "Red_Server_2007" is created.

File System Changes

Create these directories:

  • %drive%\runauto..\





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