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General

  • Target

    https://cdn.discordapp.com/attachments/1179648770095448204/1230249076235173948/Krampus_V1.0.3.exe?ex=6632a1bc&is=66202cbc&hm=f630c8a70eb9ff386d3c4988ec7bab629c2dd21707b9d0a7058efd2eb356b3d2&

  • Sample

    240418-wnzb8acb2x

Malware Config

Extracted

Family

xworm

C2

north-untitled.gl.at.ply.gg:29298

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    discord.exe

Targets

    • Target

      https://cdn.discordapp.com/attachments/1179648770095448204/1230249076235173948/Krampus_V1.0.3.exe?ex=6632a1bc&is=66202cbc&hm=f630c8a70eb9ff386d3c4988ec7bab629c2dd21707b9d0a7058efd2eb356b3d2&

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • UPX packed file

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

    • Adds Run key to start application

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks