General

  • Target
    09eef44272d050d8054cf913ed7bbf48.exe
  • Size 3.2MB
  • Sample240310-mxtnnabb81
  • SHA256 87f220dad3bbeec6f39ed3e74eaa5b63f91924104b238fd33b4c5d49cc88f1ac
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      09eef44272d050d8054cf913ed7bbf48.exe
    • Size 3.2MB
    • SHA256 87f220dad3bbeec6f39ed3e74eaa5b63f91924104b238fd33b4c5d49cc88f1ac
    • MD5 SHA1 SHA512 SSDEEP
    • 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.

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as modifying certain DLL exports to make their binary seem valid.

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • 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 desktop.ini file(s)

    • Looks up external IP address via web service

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

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    • Modifies termsrv.dll

      Commonly used to allow simultaneous RDP sessions.

MITRE ATT&CK Enterprise v15

Tasks