General

  • Target
    https://www.mediafire.com/file/vbp3ev0s8k1kn3s/Krampus.zip/file
  • Sample240607-2afwlsed75

Malware Config

Extracted

Family
  • xworm

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/a1kmrNub

Targets

    • Target
      https://www.mediafire.com/file/vbp3ev0s8k1kn3s/Krampus.zip/file
    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • UPX packed file

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

    • Adds Run key to start application

    • 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.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

MITRE ATT&CK Enterprise v15

Tasks