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Trojan.Siggen9.57217

Added to the Dr.Web virus database: 2020-07-08

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [<HKLM>\System\CurrentControlSet\Services\G2ARemoteSupport_SWCcjiTcAs] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\G2ARemoteSupport_SWCcjiTcAs] 'ImagePath' = '"%ProgramFiles(x86)%\GoToAssist Remote Support Unattended\GoToAssistProcessChecker.exe" -Service -WorkFolde...
Creates the following services
  • 'G2ARemoteSupport_SWCcjiTcAs' "%ProgramFiles(x86)%\GoToAssist Remote Support Unattended\GoToAssistProcessChecker.exe" -Service -WorkFolder "%ProgramFiles(x86)%\GoToAssist Remote Support Unattended" -ApplicationType "4"
Modifies file system
Creates the following files
  • <Current directory>\unattendedupdater.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistui.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\libgotoassist.dll
  • <Full path to file>.cmd
  • %ProgramFiles(x86)%\gotoassist remote support unattended\unattended.json
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\gotoassistunattended.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistcrashhandler.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistprocesschecker.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_processchecker
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\gotoassistunattendedui.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattendeduijsonsink
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattendedui
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\gotoassistunattended.srv.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\gotoassistprocesschecker.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\gotoassistprocesschecker.srv.log
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassisttools64.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassisttools32.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunlock64.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmifilterhook32.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmifilterhook64.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmiinputhook32.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmiinputhook64.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmiscrhook32.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmiscrhook64.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattended.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmisupport7x32.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmisupportm32.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmisupportm64.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\mediaclientlib.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattendedui.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattendedremover.exe
  • %ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunlock32.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\lmisupport7x64.dll
  • <SYSTEM32>\gotoassistunlock64.dll
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended
Deletes the following files
  • <Full path to file>.cmd
Moves the following files
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601e217c9eb8e55d60184070000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d6016063fb138f55d601400a0000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601fe51c9138f55d601400a0000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d6013218ac098f55d601a0040000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d6011c4275098f55d601a0040000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d6015220a6058f55d601280a0000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d60120fc60058f55d601280a0000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601dda6a0198f55d60134030000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601f29f9d018f55d60100030000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d6010af967fd8e55d6019c030000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601d8d422fd8e55d6019c030000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601928a6bf98e55d6014c040000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601060424f98e55d6014c040000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601583063f58e55d60170080000feffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601724719f58e55d60170080000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601661956018f55d60100030000ffffffff
  • from %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended to %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\2362bb878c55d601e555d0198f55d60134030000feffffff
Substitutes the following files
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_jsonsink
  • %ProgramFiles(x86)%\gotoassist remote support unattended\appdata\ipc\swccjitcas_unattended
Deletes itself.
Miscellaneous
Creates and executes the following
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattended.exe' -regsvc
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistprocesschecker.exe' -regsvc -starterpid 2548 -WorkFolder "%ProgramFiles(x86)%\GoToAssist Remote Support Unattended" -ApplicationType 4
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistprocesschecker.exe' -Service -WorkFolder "%ProgramFiles(x86)%\GoToAssist Remote Support Unattended" -ApplicationType "4"
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattended.exe' "-RegisteredProcess" "1" "-ParentProcessId" "324" "-ServiceName" "G2ARemoteSupport_SWCcjiTcAs"
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattendedui.exe'
  • '%WINDIR%\syswow64\cmd.exe' /S /C ""<Full path to file>.cmd" "<Full path to file>""' (with hidden window)
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattended.exe' "-RegisteredProcess" "1" "-ParentProcessId" "324" "-ServiceName" "G2ARemoteSupport_SWCcjiTcAs"' (with hidden window)
  • '%ProgramFiles(x86)%\gotoassist remote support unattended\gotoassistunattendedui.exe' ' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /S /C ""<Full path to file>.cmd" "<Full path to file>""

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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