General

  • Target

    DCRatBuild.exe

  • Size

    1.5MB

  • Sample

    240619-r94fvasdmb

  • MD5

    c9c86d7f5da7185796d38533ff00e122

  • SHA1

    795a06d1d2c4c3930c9e078ae7697b672deae551

  • SHA256

    7b612f59430f89b4a130c19c3f59e036e93cd21b8b8dd9049f453ad39aefb516

  • SHA512

    bc4d249dfeb1864556eca5fb02ded4530c09f0c7aa2b37e05c1fe9215058613f7e9e086e856259e7c25d49229b03289f75c691bfb786b227040e549f4ff1502f

  • SSDEEP

    24576:q2G/nvxW3WXlB6Fw6rxnwoHnf6YkBCY3CE63SjC8ElvCmR2:qbA3q4wsxvfQ3cX8ElfM

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      1.5MB

    • MD5

      c9c86d7f5da7185796d38533ff00e122

    • SHA1

      795a06d1d2c4c3930c9e078ae7697b672deae551

    • SHA256

      7b612f59430f89b4a130c19c3f59e036e93cd21b8b8dd9049f453ad39aefb516

    • SHA512

      bc4d249dfeb1864556eca5fb02ded4530c09f0c7aa2b37e05c1fe9215058613f7e9e086e856259e7c25d49229b03289f75c691bfb786b227040e549f4ff1502f

    • SSDEEP

      24576:q2G/nvxW3WXlB6Fw6rxnwoHnf6YkBCY3CE63SjC8ElvCmR2:qbA3q4wsxvfQ3cX8ElfM

    • 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.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

MITRE ATT&CK Enterprise v15

Tasks