General

  • Target
    7ebabb8b4bb51cf.exe
  • Size 8.1MB
  • Sample240511-yy9xtaaa96
  • SHA256 16771b819b03044356bad5b6d2a6b0f84e7fbd94c336743b58bbe5dc2e2ccbe8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      7ebabb8b4bb51cf.exe
    • Size 8.1MB
    • SHA256 16771b819b03044356bad5b6d2a6b0f84e7fbd94c336743b58bbe5dc2e2ccbe8
    • MD5 SHA1 SHA512 SSDEEP
    • DcRat

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

    • Detect Umbral payload

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • 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.

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Checks whether UAC is enabled

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks