General

  • Target
    c9f428ba2c75e97507c3f0a24d44f02e.exe
  • Size 2.5MB
  • Sample220417-d8rtrsheaq
  • SHA256 f4c480507a92330a160dc69769a67d57ff95daea0bd9cd94c914184472b8bbf9
  • MD5 SHA1 SHA512

Malware Config

Targets

    • Target
      c9f428ba2c75e97507c3f0a24d44f02e.exe
    • Size 2.5MB
    • SHA256 f4c480507a92330a160dc69769a67d57ff95daea0bd9cd94c914184472b8bbf9
    • MD5 SHA1 SHA512
    • 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

    • suricata: ET MALWARE DCRAT Activity (GET)

      suricata: ET MALWARE DCRAT Activity (GET)

    • Executes dropped EXE

    • Checks computer location settings

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

    • 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

    • Checks whether UAC is enabled

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v6

Tasks