General

  • Target

    Winlocker Builder v0.6.exe

  • Size

    1.3MB

  • Sample

    250125-adzz4svrfw

  • MD5

    4f768716267ee42c40f6cb0578bae261

  • SHA1

    e143ab8ad439e224232bac5d0edc7f2051cbdc13

  • SHA256

    86bcea956a17faa66f5354fe890fae5fc41d2156b28ec1030d58aa9c51e32299

  • SHA512

    5f51a734c6eef7a9aba22e78c8dece02bff2adee06f8551f2f7fd57b77a6f2a22c39f46930bcf1f62c116725ef0fd5e56d7da7a893210a35c2f2721949de0a27

  • SSDEEP

    24576:DbXvsRLDInc+3WNyc4aKZQ6VvDrVq3EXcWdFVtV6d/PHk:U0c+Gr1YBrNXcEFVf6pPH

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

vTtlhGPfn0ebMPsq

Attributes
  • Install_directory

    %Public%

  • install_file

    explorer.exe

  • pastebin_url

    https://pastebin.com/raw/4zaiEtZS

  • telegram

    https://api.telegram.org/bot8175192176:AAHZuZ0-rHS66YSwsvh8-gQjbZYSbY3IyXo/sendMessage?chat_id=7537927256

aes.plain

Targets

    • Target

      Winlocker Builder v0.6.exe

    • Size

      1.3MB

    • MD5

      4f768716267ee42c40f6cb0578bae261

    • SHA1

      e143ab8ad439e224232bac5d0edc7f2051cbdc13

    • SHA256

      86bcea956a17faa66f5354fe890fae5fc41d2156b28ec1030d58aa9c51e32299

    • SHA512

      5f51a734c6eef7a9aba22e78c8dece02bff2adee06f8551f2f7fd57b77a6f2a22c39f46930bcf1f62c116725ef0fd5e56d7da7a893210a35c2f2721949de0a27

    • SSDEEP

      24576:DbXvsRLDInc+3WNyc4aKZQ6VvDrVq3EXcWdFVtV6d/PHk:U0c+Gr1YBrNXcEFVf6pPH

    • Detect Xworm Payload

    • Modifies visiblity of hidden/system files in Explorer

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • 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.

    • Executes dropped EXE

    • Loads dropped DLL

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks