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Trojan.MulDrop7.21241

Added to the Dr.Web virus database: 2017-03-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Classes\.pif] '' = 'piffile'
  • [<HKLM>\SOFTWARE\Classes\.cmd] '' = 'cmdfile'
  • [<HKLM>\SOFTWARE\Classes\.bat] '' = 'batfile'
  • [<HKLM>\SOFTWARE\Classes\.com] '' = 'comfile'
  • [<HKLM>\SOFTWARE\Classes\MSProgramGroup\Shell\Open\Command] '' = '<SYSTEM32>\grpconv.exe %1'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'GrpConv' = 'grpconv -o'
  • [<HKLM>\SOFTWARE\Classes\.exe] '' = 'exefile'
  • [<HKLM>\SOFTWARE\Classes\cfxxefile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] '' = ''
  • [<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\piffile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\cmdfile\shell\open\command] '' = '"%1" %*'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
  • System Restore (SR)
Executes the following:
  • '<SYSTEM32>\grpconv.exe' -o
  • 'C:\32788R22FWJFW\swreg.exe' acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
  • 'C:\32788R22FWJFW\n.pif' cmdwait 3000 exec hide 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /reset /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
  • 'C:\32788R22FWJFW\n.pif' cmdwait 150 exec hide 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
  • 'C:\32788R22FWJFW\n.pif' exec hide 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\swxcacls.cfxxe' "<SYSTEM32>\cmd.exe" /P /GA:F /GS:F /GU:X /GP:X /I ENABLE /Q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\swreg.exe' acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\n.pif' shellcopy <SYSTEM32>\en-us\cmd.exe.mui 32788R22FWJFW\EN-US\cmd.cfxxe.mui yestoall noerrorui silent nosecattr
  • 'C:\32788R22FWJFW\NirCmd.cfxxe' cmdwait 1700 exec hide "32788R22FWJFW\cmd.cfxxe" /c 32788R22FWJFW\p.cmd
  • 'C:\32788R22FWJFW\n.pif' cmdwait 1000 exec hide "32788R22FWJFW\cmd.cfxxe" /c 32788R22FWJFW\p.cmd
  • 'C:\32788R22FWJFW\n.pif' cmdwait 2500 exec hide "32788R22FWJFW\cmd.cfxxe" /c 32788R22FWJFW\p.cmd
  • 'C:\32788R22FWJFW\cmd.cfxxe' /c 32788R22FWJFW\p.cmd
  • 'C:\32788R22FWJFW\NirCmd.cfxxe' exec hide 32788R22FWJFW\GSAR.cfxxe -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "<SYSTEM32>\cmd.exe" "32788R22FWJFW\cmd.cfxxe"
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /reset /q
  • 'C:\32788R22FWJFW\NirCmd.cfxxe' shellcopy <SYSTEM32>\en-us\cmd.exe.mui 32788R22FWJFW\EN-US\cmd.cfxxe.mui yestoall noerrorui silent nosecattr
  • 'C:\32788R22FWJFW\gsar.cfxxe' -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "<SYSTEM32>\cmd.exe" "32788R22FWJFW\cmd.cfxxe"
  • 'C:\32788R22FWJFW\n.pif' exec hide 32788R22FWJFW\GSAR.cfxxe -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "<SYSTEM32>\cmd.exe" "32788R22FWJFW\cmd.cfxxe"
  • 'C:\32788R22FWJFW\n.pif' shexec install 32788R22FWJFW\Prep.inf
  • 'C:\32788R22FWJFW\License\iexplore.exe' -k *sysguard.exe
  • 'C:\32788R22FWJFW\n.pif' exec hide 32788R22FWJFW\PEV.exe RIMPORT 32788R22FWJFW\EXE.reg
  • '<SYSTEM32>\rundll32.exe' setupapi,InstallHinfSection DefaultInstall 132 C:\32788R22FWJFW\Prep.inf
  • 'C:\32788R22FWJFW\pev.exe' -k * and { *Antivirus*Pro.exe or *Police*Pro.exe or svch[!o]st.exe or sv[!c]host.exe or winupdate.exe or or ANTI_files.exe or dbsinit.exe or ?.exe or desot.exe or desote.exe or *sysguard.exe or...
  • 'C:\32788R22FWJFW\iexplore.exe' win close ititle "SysInternals"
  • 'C:\32788R22FWJFW\iexplore.exe' win close ititle " Security"
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\pev.exe -k * and { *Antivirus*Pro.exe or *Police*Pro.exe or svch[!o]st.exe or sv[!c]host.exe or winupdate.exe or or ANTI_files.exe or dbsinit.exe or ?.exe or desot.exe or desote.e...
  • 'C:\32788R22FWJFW\iexplore.exe' exec hide 32788R22FWJFW\License\iexplore.exe -k *sysguard.exe
  • 'C:\32788R22FWJFW\pev.exe' RIMPORT 32788R22FWJFW\EXE.reg
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Command Processor" /reset /q
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options" /reset /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\SWXCACLS.cfxxe "<SYSTEM32>\cmd.exe" /P /GA:F /GS:F /GU:X /GP:X /I ENABLE /Q
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Command Processor" /reset /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options" /reset /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\PEV.exe RIMPORT 32788R22FWJFW\EXE.reg
  • '<SYSTEM32>\runonce.exe' -r
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /da:r /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /da:r /q
Modifies file system:
Creates the following files:
  • C:\32788R22FWJFW\Policies.dat
  • C:\32788R22FWJFW\NetworkService.dat
  • C:\32788R22FWJFW\RCLink.dat
  • C:\32788R22FWJFW\Purity.dat
  • C:\32788R22FWJFW\netsvc.xp.dat
  • C:\32788R22FWJFW\netsvc.bad.dat
  • C:\32788R22FWJFW\ndis_combofix.dat
  • C:\32788R22FWJFW\netsvc.vista.dat
  • C:\32788R22FWJFW\netsvc.dat
  • C:\32788R22FWJFW\region.dat
  • C:\32788R22FWJFW\svchost.dat
  • C:\32788R22FWJFW\svc_wht.dat
  • C:\32788R22FWJFW\svchost.w7.dat
  • C:\32788R22FWJFW\svchost.vista.dat
  • C:\32788R22FWJFW\Safeboot.def.w7.dat
  • C:\32788R22FWJFW\safeboot.dat
  • C:\32788R22FWJFW\rogues.dat
  • C:\32788R22FWJFW\safeboot.def.vista.dat
  • C:\32788R22FWJFW\safeboot.def.dat
  • C:\32788R22FWJFW\tail.cfxxe
  • C:\32788R22FWJFW\swxcacls.cfxxe
  • C:\32788R22FWJFW\NirCmd.chm
  • C:\32788R22FWJFW\zip.cfxxe
  • C:\32788R22FWJFW\swsc.cfxxe
  • C:\32788R22FWJFW\NirCmdC.cfxxe
  • C:\32788R22FWJFW\NirCmd.cfxxe
  • C:\32788R22FWJFW\setpath.cfxxe
  • C:\32788R22FWJFW\sed.cfxxe
  • C:\32788R22FWJFW\023.dat
  • C:\32788R22FWJFW\LocalService.dat
  • C:\32788R22FWJFW\Fin.dat
  • C:\32788R22FWJFW\LocalSystemNetworkRestricted.dat
  • C:\32788R22FWJFW\LocalServiceNetworkRestricted.dat
  • C:\32788R22FWJFW\Dnl.dat
  • C:\32788R22FWJFW\023w7.dat
  • C:\32788R22FWJFW\023v.dat
  • C:\32788R22FWJFW\CregC.dat
  • C:\32788R22FWJFW\Creg.dat
  • C:\32788R22FWJFW\svchost.w7.x64.dat
  • C:\32788R22FWJFW\DPF.str
  • C:\32788R22FWJFW\asp.str
  • C:\32788R22FWJFW\av.vbs
  • C:\32788R22FWJFW\Rust.str
  • C:\32788R22FWJFW\toolbar.sed
  • C:\32788R22FWJFW\REGDACL.sed
  • C:\32788R22FWJFW\embedded.sed
  • C:\32788R22FWJFW\run2.sed
  • C:\32788R22FWJFW\RegDo.sed
  • C:\32788R22FWJFW\lnkread.vbs
  • C:\32788R22FWJFW\License\streamtools.zip
  • C:\32788R22FWJFW\License\pv_5_2_2.zip
  • C:\32788R22FWJFW\prep.done
  • C:\32788R22FWJFW\cmd.cfxxe
  • C:\32788R22FWJFW\image001.gif
  • C:\32788R22FWJFW\restore_pt.vbs
  • C:\32788R22FWJFW\OSid.vbs
  • C:\32788R22FWJFW\Wmi_rem.vbs
  • C:\32788R22FWJFW\SvcDrv.vbs
  • C:\32788R22FWJFW\zDomain.dat
  • C:\32788R22FWJFW\xpreg.dat
  • C:\32788R22FWJFW\ERDNT.e_e
  • C:\32788R22FWJFW\zhsvc.dat
  • C:\32788R22FWJFW\w7reg.dat
  • C:\32788R22FWJFW\vistareg.dat
  • C:\32788R22FWJFW\system_ini.dat
  • C:\32788R22FWJFW\w2kreg.dat
  • C:\32788R22FWJFW\vun.dat
  • C:\32788R22FWJFW\ERDNTDOS.LOC
  • C:\32788R22FWJFW\n.pif
  • C:\32788R22FWJFW\md5sum00.pif
  • C:\32788R22FWJFW\ddsDo.sed
  • C:\32788R22FWJFW\Exe.reg
  • C:\32788R22FWJFW\md5sum.pif
  • C:\32788R22FWJFW\ERUNT.LOC
  • C:\32788R22FWJFW\ERDNTWIN.LOC
  • C:\32788R22FWJFW\files.pif
  • C:\32788R22FWJFW\srizbi.md5
  • C:\32788R22FWJFW\ncmd.cfxxe
  • C:\32788R22FWJFW\av.cmd
  • C:\32788R22FWJFW\Auto-RC.cmd
  • C:\32788R22FWJFW\Boot-Rk.cmd
  • C:\32788R22FWJFW\AWF.cmd
  • C:\32788R22FWJFW\Assoc.cmd
  • C:\32788R22FWJFW\MoveIt.bat
  • C:\32788R22FWJFW\List.bat
  • C:\32788R22FWJFW\SetEnvmt.bat
  • C:\32788R22FWJFW\ND_.bat
  • C:\32788R22FWJFW\Catch-sub.cmd
  • C:\32788R22FWJFW\GetHive.cmd
  • C:\32788R22FWJFW\FKMGen.cmd
  • C:\32788R22FWJFW\katch.cmd
  • C:\32788R22FWJFW\Install-RC.cmd
  • C:\32788R22FWJFW\FD-SV.cmd
  • C:\32788R22FWJFW\Create.cmd
  • C:\32788R22FWJFW\CF-Script.cmd
  • C:\32788R22FWJFW\CSet.cmd
  • C:\32788R22FWJFW\CregC.cmd
  • C:\32788R22FWJFW\License\UnxUtilsDist.html
  • C:\32788R22FWJFW\License\Zip - license.txt
  • C:\32788R22FWJFW\c.bat
  • C:\32788R22FWJFW\Boot.bat
  • C:\32788R22FWJFW\License\mtee.txt.txt
  • C:\32788R22FWJFW\License\dumphive-license.txt
  • C:\32788R22FWJFW\License\Curl - license.txt
  • C:\32788R22FWJFW\License\FI - license.txt
  • C:\32788R22FWJFW\License\EXTRACT.TXT
  • C:\32788R22FWJFW\Combobatch.bat
  • C:\32788R22FWJFW\List-B.bat
  • C:\32788R22FWJFW\Lang.bat
  • C:\32788R22FWJFW\List-D.bat
  • C:\32788R22FWJFW\List-C.bat
  • C:\32788R22FWJFW\history.bat
  • C:\32788R22FWJFW\DelClsid64.bat
  • C:\32788R22FWJFW\DelClsid.bat
  • C:\32788R22FWJFW\FIXLSP.bat
  • C:\32788R22FWJFW\FIND3M.bat
  • C:\32788R22FWJFW\Kill-All.cmd
  • C:\32788R22FWJFW\catchme.cfxxe
  • C:\32788R22FWJFW\appinit.bad
  • C:\32788R22FWJFW\dd.cfxxe
  • C:\32788R22FWJFW\ComboFix-Download.cfxxe
  • C:\32788R22FWJFW\VInfo
  • C:\32788R22FWJFW\w_sock.dll
  • C:\32788R22FWJFW\ffdefstr.dll
  • C:\32788R22FWJFW\Combo-Fix.sys
  • C:\32788R22FWJFW\w2k_sock.dll
  • C:\32788R22FWJFW\dumphive.cfxxe
  • C:\32788R22FWJFW\mbr.cfxxe
  • C:\32788R22FWJFW\handle.cfxxe
  • C:\32788R22FWJFW\License\ncmd.cfxxe
  • C:\32788R22FWJFW\mtee.cfxxe
  • C:\32788R22FWJFW\gsar.cfxxe
  • C:\32788R22FWJFW\extract.cfxxe
  • C:\32788R22FWJFW\ERUNT.cfxxe
  • C:\32788R22FWJFW\grep.cfxxe
  • C:\32788R22FWJFW\FileKill.cfxxe
  • C:\32788R22FWJFW\SRestore.cmd
  • C:\32788R22FWJFW\SnapShot.cmd
  • C:\32788R22FWJFW\Update-CF.cmd
  • C:\32788R22FWJFW\SuppScan.cmd
  • C:\32788R22FWJFW\Rkey.cmd
  • C:\32788R22FWJFW\P.cmd
  • C:\32788R22FWJFW\NT-OS.cmd
  • C:\32788R22FWJFW\RegScan64.cmd
  • C:\32788R22FWJFW\RegScan.cmd
  • C:\32788R22FWJFW\badclsid.c
  • C:\32788R22FWJFW\pev.exe
  • C:\32788R22FWJFW\License\iexplore.exe
  • C:\32788R22FWJFW\BootSect.dll
  • C:\32788R22FWJFW\swreg.exe
  • C:\32788R22FWJFW\iexplore.exe
  • C:\32788R22FWJFW\Prep.inf
  • C:\32788R22FWJFW\clsid.c
  • C:\32788R22FWJFW\hidec.exe
  • C:\32788R22FWJFW\pv.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'EDIT' WindowName: ''

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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
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    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
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