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Trojan.MulDrop5.27112
Added to the Dr.Web virus database:
2014-05-30
Virus description added:
2014-05-30
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Classes\cmdfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\piffile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\MSProgramGroup\Shell\Open\Command] '' = '<SYSTEM32>\grpconv.exe %1'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'GrpConv' = 'grpconv -o'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] '' = ''
[<HKLM>\SOFTWARE\Classes\.com] '' = 'comfile'
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\cfxxefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\.exe] '' = 'exefile'
[<HKLM>\SOFTWARE\Classes\.pif] '' = 'piffile'
[<HKLM>\SOFTWARE\Classes\.cmd] '' = 'cmdfile'
[<HKLM>\SOFTWARE\Classes\.bat] '' = 'batfile'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
Creates and executes the following:
'<SYSTEM32>\cmd.execf' /c 32788R22FWJFW\p.cmd
'C:\32788R22FWJFW\n.pif' cmdwait 2500 exec hide "<SYSTEM32>\cmd.execf" /c 32788R22FWJFW\p.cmd
'C:\32788R22FWJFW\grep.cfxxe' -F "5.2." OsVer
'C:\32788R22FWJFW\swreg.exe' QUERY "HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_{79007602-0CDB-4405-9DBF-1257BB3226ED}\0000\Control" /v ActiveService
'C:\32788R22FWJFW\grep.cfxxe' -F "5.1.2" OsVer
'C:\32788R22FWJFW\pev.exe' -k -r "<Full path to virus>" or n.pif
'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /reset /q
'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" "<SYSTEM32>\cmd.execf"
'C:\32788R22FWJFW\n.pif' cmdwait 1000 exec hide "<SYSTEM32>\cmd.execf" /c 32788R22FWJFW\p.cmd >\Bug.txt 2>&1
'<SYSTEM32>\cmd.execf' /c 32788R22FWJFW\p.cmd >\Bug.txt 2>&1
'C:\32788R22FWJFW\NirCmd.cfxxe' cmdwait 1700 exec hide "<SYSTEM32>\cmd.execf" /c 32788R22FWJFW\p.cmd
'C:\32788R22FWJFW\pev.exe' UZIP License\pv_5_2_2.zip .\
'C:\32788R22FWJFW\NircmdB.exe' win close ititle "ComboFix"
'C:\32788R22FWJFW\NircmdB.exe' win close class "#32770"
'C:\32788R22FWJFW\PEV.cfxxe' -rtf --c:##5# .\* and { License.exe or 32788R22FWJFW.exe or OsVer.exe or WinNT.exe or N_.exe }
'C:\32788R22FWJFW\PEV.cfxxe' -tf --files:files.pif --c:##5#b#f#
'C:\32788R22FWJFW\PEV.cfxxe' -rtf -md55C9BAFC3DF904E91CA46CBBE435DFDBB .\md5sum.pif
'C:\32788R22FWJFW\PV.cfxxe' -kf runonce.exe grpconv.exe procmon.exe ANDRE.EXE TOLO.exe Merlin.scr jalang.exe jalangkung.exe jantungan.exe DOSEN.exe C3W3K4MPUS.exe
'C:\32788R22FWJFW\grep.cfxxe' -isq "ProductType.*WinNT" WinNT00
'C:\32788R22FWJFW\swreg.exe' QUERY "HKLM\SYSTEM\CURRENTCONTROLSET\CONTROL\PRODUCTOPTIONS" /v ProductType
'C:\32788R22FWJFW\sed.cfxxe' "/^PATH=/I!d; s///; s/\x22//g" Oripath
'C:\32788R22FWJFW\swreg.exe' import EXE.reg
'C:\32788R22FWJFW\pev.exe' -rtf -s+901 .\OriPath00
'C:\32788R22FWJFW\gsar.cfxxe' -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "<SYSTEM32>\cmd.exe" "<SYSTEM32>\cmd.execf"
'C:\32788R22FWJFW\swreg.exe' import 32788R22FWJFW\EXE.reg
'C:\32788R22FWJFW\hidec.exe' 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\Image File Execution Options" /reset /q
'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options" /reset /q
'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /da:r /q
'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe import 32788R22FWJFW\EXE.reg
'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 svchast.exe or winupdate.exe or or ANTI_files.exe or dbsinit.exe or desot.exe or aap.exe or -preg"\d{3,}.exe" }
'C:\32788R22FWJFW\n.pif' shexec install 32788R22FWJFW\Prep.inf
'C:\32788R22FWJFW\pev.exe' -k * and { *Antivirus*Pro.exe or svchast.exe or winupdate.exe or or ANTI_files.exe or dbsinit.exe or desot.exe or aap.exe or -preg"\d{3,}.exe" }
'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\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\hidec.exe' 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
'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" "<SYSTEM32>\cmd.execf"
'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" /O Guest /Q
'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Command Processor" /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\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
Executes the following:
'<SYSTEM32>\grpconv.exe' -o
'<SYSTEM32>\runonce.exe' -r
'<SYSTEM32>\rundll32.exe' setupapi,InstallHinfSection DefaultInstall 132 C:\32788R22FWJFW\Prep.inf
Terminates or attempts to terminate
the following user processes:
Modifies file system :
Creates the following files:
Deletes the following files:
C:\32788R22FWJFW\OriPath00
C:\32788R22FWJFW\pv.txt
C:\32788R22FWJFW\OriPath
C:\32788R22FWJFW\WinNT00
C:\32788R22FWJFW\md5sum00.pif
Moves the following files:
from C:\32788R22FWJFW\pv.exe to C:\32788R22FWJFW\PV.cfxxe
Miscellaneous:
Searches for the following windows:
ClassName: 'Shell_TrayWnd' WindowName: '(null)'
ClassName: 'EDIT' WindowName: '(null)'
Curing recommendations
Windows
macOS
Linux
Android
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 .
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
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);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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