General

  • Target

    DCRatBuild.exe

  • Size

    1.2MB

  • Sample

    240611-la9wpasdnj

  • MD5

    0d9d4b342cfddce2cf1685b2de5ca7cc

  • SHA1

    ed6ca21979a879db35d086756838ae137bc99480

  • SHA256

    ec122a93a086eb5a3c24c82767ce389bf3b3f516db319af234e18868cbb181fd

  • SHA512

    f92a442825f640b9c57d4d68811ac5c354bd96a199b5954d4debcf2b3d88f9c598723fb55d2daf8b66b61beee882564c2b6c4e27cf8488755c6e23e31106bcab

  • SSDEEP

    24576:u2G/nvxW3WieCvj2mk5vYoW4YdMVbxOpuiuKRF/k9:ubA3jL8QoWLAxOx9F2

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      1.2MB

    • MD5

      0d9d4b342cfddce2cf1685b2de5ca7cc

    • SHA1

      ed6ca21979a879db35d086756838ae137bc99480

    • SHA256

      ec122a93a086eb5a3c24c82767ce389bf3b3f516db319af234e18868cbb181fd

    • SHA512

      f92a442825f640b9c57d4d68811ac5c354bd96a199b5954d4debcf2b3d88f9c598723fb55d2daf8b66b61beee882564c2b6c4e27cf8488755c6e23e31106bcab

    • SSDEEP

      24576:u2G/nvxW3WieCvj2mk5vYoW4YdMVbxOpuiuKRF/k9:ubA3jL8QoWLAxOx9F2

    • DcRat

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

    • 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.

    • Disables Task Manager via registry modification

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks whether UAC is enabled

MITRE ATT&CK Enterprise v15

Tasks