General

  • Target
    34cb7fca8cb671327865d0bcf6de72bc.exe
  • Size 11.4MB
  • Sample240620-vmdtfssfjk
  • SHA256 a6a27d9ba682a107558cdb16fcd50ebbe3d112c8dab38e96d5926c522781cc81
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      34cb7fca8cb671327865d0bcf6de72bc.exe
    • Size 11.4MB
    • SHA256 a6a27d9ba682a107558cdb16fcd50ebbe3d112c8dab38e96d5926c522781cc81
    • 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.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • 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

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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.

    • Hide Artifacts: Hidden Files and Directories

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks