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Trojan.MulDrop6.53808

Added to the Dr.Web virus database: 2016-08-31

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:
  • 'C:\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' 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\hidec.exe' 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Command Processor" /reset /q
  • 'C:\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\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\n.pif' exec hide 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 and { *sysguard.exe or ???*tssd.exe or a-fast.exe or -preg"\\[\da-f]*\d[\da-f]*\\*.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 a-fast.exe or digprot.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 d...
  • '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 a-fast.exe or digprot.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 ?...
  • 'C:\32788R22FWJFW\iexplore.exe' exec hide 32788R22FWJFW\License\iexplore.exe -k and { *sysguard.exe or ???*tssd.exe or a-fast.exe or -preg"\\[\da-f]*\d[\da-f]*\\*.exe" }
  • '<SYSTEM32>\runonce.exe' -r
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options" /reset /q
  • '<SYSTEM32>\grpconv.exe' -o
  • 'C:\32788R22FWJFW\hidec.exe' 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\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
  • 'C:\32788R22FWJFW\pev.exe' RIMPORT 32788R22FWJFW\EXE.reg
  • '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\region.dat
  • C:\32788R22FWJFW\RCLink.dat
  • C:\32788R22FWJFW\safeboot.dat
  • C:\32788R22FWJFW\rogues.dat
  • C:\32788R22FWJFW\Purity.dat
  • C:\32788R22FWJFW\netsvc.xp.dat
  • C:\32788R22FWJFW\netsvc.vista.dat
  • C:\32788R22FWJFW\Policies.dat
  • C:\32788R22FWJFW\NetworkService.dat
  • C:\32788R22FWJFW\safeboot.def.dat
  • C:\32788R22FWJFW\svchost.w7.x64.dat
  • C:\32788R22FWJFW\svchost.w7.dat
  • C:\32788R22FWJFW\Vipev.dat
  • C:\32788R22FWJFW\system_ini.dat
  • C:\32788R22FWJFW\svchost.vista.dat
  • C:\32788R22FWJFW\Safeboot.def.w7.dat
  • C:\32788R22FWJFW\safeboot.def.vista.dat
  • C:\32788R22FWJFW\svchost.dat
  • C:\32788R22FWJFW\svc_wht.dat
  • C:\32788R22FWJFW\netsvc.dat
  • C:\32788R22FWJFW\NirCmd.chm
  • C:\32788R22FWJFW\zip.cfxxe
  • C:\32788R22FWJFW\023v.dat
  • C:\32788R22FWJFW\023.dat
  • C:\32788R22FWJFW\tail.cfxxe
  • C:\32788R22FWJFW\setpath.cfxxe
  • C:\32788R22FWJFW\sed.cfxxe
  • C:\32788R22FWJFW\swxcacls.cfxxe
  • C:\32788R22FWJFW\swsc.cfxxe
  • C:\32788R22FWJFW\023w7.dat
  • C:\32788R22FWJFW\LocalSystemNetworkRestricted.dat
  • C:\32788R22FWJFW\LocalServiceNetworkRestricted.dat
  • C:\32788R22FWJFW\netsvc.bad.dat
  • C:\32788R22FWJFW\ndis_combofix.dat
  • C:\32788R22FWJFW\LocalService.dat
  • C:\32788R22FWJFW\CregC.dat
  • C:\32788R22FWJFW\Creg.dat
  • C:\32788R22FWJFW\Fin.dat
  • C:\32788R22FWJFW\Dnl.dat
  • C:\32788R22FWJFW\vistareg.dat
  • C:\32788R22FWJFW\Rust.str
  • C:\32788R22FWJFW\DPF.str
  • C:\32788R22FWJFW\DrvRun.vbs
  • C:\32788R22FWJFW\av.vbs
  • C:\32788R22FWJFW\asp.str
  • C:\32788R22FWJFW\RegDo.sed
  • C:\32788R22FWJFW\REGDACL.sed
  • C:\32788R22FWJFW\toolbar.sed
  • C:\32788R22FWJFW\run2.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\embedded.sed
  • C:\32788R22FWJFW\Thumbs.db
  • C:\32788R22FWJFW\zhsvc.dat
  • C:\32788R22FWJFW\ERDNTDOS.LOC
  • C:\32788R22FWJFW\ERDNT.e_e
  • C:\32788R22FWJFW\zDomain.dat
  • C:\32788R22FWJFW\w2kreg.dat
  • C:\32788R22FWJFW\vun.dat
  • C:\32788R22FWJFW\xpreg.dat
  • C:\32788R22FWJFW\w7reg.dat
  • C:\32788R22FWJFW\ERDNTWIN.LOC
  • C:\32788R22FWJFW\Exe.reg
  • C:\32788R22FWJFW\n.pif
  • C:\32788R22FWJFW\ddsDo.sed
  • C:\32788R22FWJFW\XPSBoot.reg
  • C:\32788R22FWJFW\md5sum00.pif
  • C:\32788R22FWJFW\srizbi.md5
  • C:\32788R22FWJFW\ERUNT.LOC
  • C:\32788R22FWJFW\md5sum.pif
  • C:\32788R22FWJFW\files.pif
  • C:\32788R22FWJFW\NirCmdC.cfxxe
  • C:\32788R22FWJFW\AWF.cmd
  • C:\32788R22FWJFW\av.cmd
  • C:\32788R22FWJFW\Catch-sub.cmd
  • C:\32788R22FWJFW\Boot-Rk.cmd
  • C:\32788R22FWJFW\Auto-RC.cmd
  • C:\32788R22FWJFW\ND_.bat
  • C:\32788R22FWJFW\MoveIt.bat
  • C:\32788R22FWJFW\Assoc.cmd
  • C:\32788R22FWJFW\SetEnvmt.bat
  • C:\32788R22FWJFW\CF-Script.cmd
  • C:\32788R22FWJFW\Install-RC.cmd
  • C:\32788R22FWJFW\GetHive.cmd
  • C:\32788R22FWJFW\Kill-All.cmd
  • C:\32788R22FWJFW\katch.cmd
  • C:\32788R22FWJFW\FKMGen.cmd
  • C:\32788R22FWJFW\CregC.cmd
  • C:\32788R22FWJFW\Create.cmd
  • C:\32788R22FWJFW\FD-SV.cmd
  • C:\32788R22FWJFW\CSet.cmd
  • C:\32788R22FWJFW\List.bat
  • 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\NT-OS.cmd
  • C:\32788R22FWJFW\dd.cfxxe
  • C:\32788R22FWJFW\ComboFix-Download.cfxxe
  • C:\32788R22FWJFW\ERUNT.cfxxe
  • C:\32788R22FWJFW\dumphive.cfxxe
  • C:\32788R22FWJFW\catchme.cfxxe
  • C:\32788R22FWJFW\Combo-Fix.sys
  • C:\32788R22FWJFW\w2k_sock.dll
  • C:\32788R22FWJFW\appinit.bad
  • C:\32788R22FWJFW\VInfo
  • C:\32788R22FWJFW\extract.cfxxe
  • C:\32788R22FWJFW\License\ncmd.cfxxe
  • C:\32788R22FWJFW\mtee.cfxxe
  • C:\32788R22FWJFW\NirCmd.cfxxe
  • C:\32788R22FWJFW\ncmd.cfxxe
  • C:\32788R22FWJFW\mbr.cfxxe
  • C:\32788R22FWJFW\grep.cfxxe
  • C:\32788R22FWJFW\FileKill.cfxxe
  • C:\32788R22FWJFW\handle.cfxxe
  • C:\32788R22FWJFW\gsar.cfxxe
  • C:\32788R22FWJFW\w_sock.dll
  • C:\32788R22FWJFW\SuppScan.cmd
  • C:\32788R22FWJFW\SRestore.cmd
  • C:\32788R22FWJFW\badclsid.c
  • C:\32788R22FWJFW\Update-CF.cmd
  • C:\32788R22FWJFW\SnapShot.cmd
  • C:\32788R22FWJFW\RegScan.cmd
  • C:\32788R22FWJFW\P.cmd
  • C:\32788R22FWJFW\Rkey.cmd
  • C:\32788R22FWJFW\RegScan64.cmd
  • C:\32788R22FWJFW\clsid.c
  • C:\32788R22FWJFW\swreg.exe
  • C:\32788R22FWJFW\pev.exe
  • C:\32788R22FWJFW\ffdefstr.dll
  • C:\32788R22FWJFW\BootSect.dll
  • C:\32788R22FWJFW\License\iexplore.exe
  • C:\32788R22FWJFW\pv.com
  • C:\32788R22FWJFW\Prep.inf
  • C:\32788R22FWJFW\iexplore.exe
  • C:\32788R22FWJFW\hidec.exe
Sets the 'hidden' attribute to the following files:
  • C:\32788R22FWJFW\Thumbs.db
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'EDIT' WindowName: ''

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all 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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