General

  • Target
    97a026b442f5d5739ea3d8565f3a044d.exe
  • Size 2.6MB
  • Sample250110-bthw7syrdm
  • SHA256 37afdc07792fe92b790bd6ba935889cef87b699d9f1a8f86336076f8cf6e4b72
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      97a026b442f5d5739ea3d8565f3a044d.exe
    • Size 2.6MB
    • SHA256 37afdc07792fe92b790bd6ba935889cef87b699d9f1a8f86336076f8cf6e4b72
    • MD5 SHA1 SHA512 SSDEEP
    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Dcrat family

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Adds Run key to start application

    • Checks whether UAC is enabled

MITRE ATT&CK Enterprise v15

Tasks