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Trojan.PWS.Siggen2.26837

Added to the Dr.Web virus database: 2019-08-09

Virus description added:

Technical Information

Malicious functions
Executes the following
  • '<SYSTEM32>\taskkill.exe' /F /IM hws.exe
  • '<SYSTEM32>\taskkill.exe' /F /IM u-eng.exe
  • '<SYSTEM32>\taskkill.exe' /F /IM mss.exe
  • '<SYSTEM32>\taskkill.exe' /F /IM css.exe
Modifies file system
Creates the following files
  • %TEMP%\rarsfx0\main.pmx
  • %TEMP%\rarsfx0\wget\_ctypes.pyd
  • %TEMP%\rarsfx0\wget.bat
  • %TEMP%\rarsfx0\delete.bat
  • %TEMP%\rarsfx0\wget\pdwin.dmx
  • %TEMP%\rarsfx0\aus.bat
  • %TEMP%\rarsfx0\fpp.pmx
  • %TEMP%\rarsfx0\w9xpopen.exe
  • %TEMP%\rarsfx0\unicodedata.pyd
  • %TEMP%\rarsfx0\select.pyd
  • %TEMP%\rarsfx0\python27.dll
  • %TEMP%\rarsfx0\library.zip
  • %TEMP%\rarsfx0\bz2.pyd
  • %TEMP%\rarsfx0\_hashlib.pyd
  • %TEMP%\rarsfx0\u-eng.exe
  • %TEMP%\rarsfx0\nos.exe
  • %TEMP%\rarsfx0\wget\_hashlib.pyd
  • %TEMP%\rarsfx0\wget\_socket.pyd
Deletes the following files
  • %TEMP%\rarsfx0\aus.bat
  • %TEMP%\rarsfx0\wget\_ctypes.pyd
  • %TEMP%\rarsfx0\fpp.pmx
  • %TEMP%\rarsfx0\wget.bat
  • %TEMP%\rarsfx0\main.pmx
  • %TEMP%\rarsfx0\delete.bat
  • %TEMP%\rarsfx0\_hashlib.pyd
  • %TEMP%\rarsfx0\w9xpopen.exe
  • %TEMP%\rarsfx0\unicodedata.pyd
  • %TEMP%\rarsfx0\u-eng.exe
  • %TEMP%\rarsfx0\select.pyd
  • %TEMP%\rarsfx0\wget\pdwin.dmx
  • %TEMP%\rarsfx0\python27.dll
  • %TEMP%\rarsfx0\nos.exe
  • %TEMP%\rarsfx0\library.zip
  • %TEMP%\rarsfx0\bz2.pyd
  • %TEMP%\rarsfx0\wget\_hashlib.pyd
  • %TEMP%\rarsfx0\wget\_socket.pyd
Miscellaneous
Searches for the following windows
  • ClassName: 'EDIT' WindowName: ''
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%TEMP%\rarsfx0\nos.exe'
  • '%TEMP%\rarsfx0\u-eng.exe' a -hp8ay73yG6s6gHu8H -r wget\pdwin.dmx hws.txt + ip.txt
  • '%TEMP%\rarsfx0\u-eng.exe' x -o+ -p8ay73yG6s6gHu8H main.pmx
  • '%TEMP%\rarsfx0\u-eng.exe' x -o+ -p8ay73yG6s6gHu8H fpp.pmx wget
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 1' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c supdel.exe -s wget' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q *.*' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 60' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c aus.bat' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /F /IM u-eng.exe' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 30' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe a -hp8ay73yG6s6gHu8H -r wget\pdwin.dmx hws.txt + ip.txt' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /F /IM hws.exe' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /F /IM mss.exe' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c wget.bat' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 10' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c hws.exe browsers > hws.txt' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe x -o+ -p8ay73yG6s6gHu8H fpp.pmx wget' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe x -o+ -p8ay73yG6s6gHu8H main.pmx' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 5' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\man\*.*' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\pyt\*.*' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\wget\*.dmx*' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\*.dmx*' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\one.jpg' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 2' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /F /IM css.exe' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\one.jpg
  • '<SYSTEM32>\cmd.exe' /c del /F /Q *.*
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 60
  • '<SYSTEM32>\cmd.exe' /c aus.bat
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 30
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe a -hp8ay73yG6s6gHu8H -r wget\pdwin.dmx hws.txt + ip.txt
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 2
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 10
  • '<SYSTEM32>\cmd.exe' /c supdel.exe -s wget
  • '<SYSTEM32>\cmd.exe' /c wget.bat
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe x -o+ -p8ay73yG6s6gHu8H fpp.pmx wget
  • '<SYSTEM32>\cmd.exe' /c u-eng.exe x -o+ -p8ay73yG6s6gHu8H main.pmx
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 5
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\man\*.*
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\pyt\*.*
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\wget\*.dmx*
  • '<SYSTEM32>\cmd.exe' /c del /F /Q %LOCALAPPDATA%\temp\Rar$DRa3736.2618\*.dmx*
  • '<SYSTEM32>\cmd.exe' /c hws.exe browsers > hws.txt
  • '<SYSTEM32>\cmd.exe' /c timeout.exe 1

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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  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.
  2. 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.

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