General

  • Target

    DCRatBuild.exe

  • Size

    3.2MB

  • Sample

    240728-m8nlsatgqr

  • MD5

    cf5d0761745d4ee36e4ec956eca8ba9d

  • SHA1

    0eae925855b6e661c7b9bf0f47e4ac998ddba2da

  • SHA256

    9b1cc99b69c9936885932acd2010c9572245a7ea290b88730738e15e3fc274bb

  • SHA512

    62dfb12641642727abf7b8d19ec1d614805b6135bfd1165ff93e3e0c6bfab3bb13682326f7ce15706306c5dc6b93acd7e86156d0ee9b383e5690130cced347ea

  • SSDEEP

    49152:UbA30MrK5MiE9IMqjwJvxyg2joIz69+8BFLlD+xUL2772M3WQf4LzNBNv:UbfKVIDY5123z69fB9lD+GL2eiWQQBNv

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      3.2MB

    • MD5

      cf5d0761745d4ee36e4ec956eca8ba9d

    • SHA1

      0eae925855b6e661c7b9bf0f47e4ac998ddba2da

    • SHA256

      9b1cc99b69c9936885932acd2010c9572245a7ea290b88730738e15e3fc274bb

    • SHA512

      62dfb12641642727abf7b8d19ec1d614805b6135bfd1165ff93e3e0c6bfab3bb13682326f7ce15706306c5dc6b93acd7e86156d0ee9b383e5690130cced347ea

    • SSDEEP

      49152:UbA30MrK5MiE9IMqjwJvxyg2joIz69+8BFLlD+xUL2772M3WQf4LzNBNv:UbfKVIDY5123z69fB9lD+GL2eiWQQBNv

    • DcRat

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

    • 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

    • Loads dropped DLL

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks