General

  • Target

    Runtime Broker.exe

  • Size

    41KB

  • Sample

    250103-s64swa1nbt

  • MD5

    3d8c8bdb3f9f8e2176e28bef2c32a872

  • SHA1

    c94ee52f063a8bcb37878a4a35f01e649a82d452

  • SHA256

    56abf6e0538aa01c4d703d318d6ab9d9f1d82a56e8327fa051af57c209270721

  • SHA512

    8ade0497a2f0d203c564fd90f7a370dc5c4c4bc6b2ec32d33da3d57897f4409b2857883aa3bb6c21276960035d07079422aaaf72987b9cce0e10efad77759138

  • SSDEEP

    768:zgBqG/D6Ykg+h5NMhllLW4pF5PM9lErl6TOwhp3tQj8:S3/D6A+hnErTFy9Wx6TOwPc8

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

89uVkC69u7sBIP4Y

Attributes
  • Install_directory

    %Temp%

  • install_file

    update.exe

  • pastebin_url

    https://pastebin.com/raw/EPNvLhJF

  • telegram

    https://api.telegram.org/bot7343382434:AAHVbjA3UMvHkIXFmk_EqanDZDs1lJukPtw/sendMessage?chat_id=1867331552

aes.plain

Extracted

Family

gurcu

C2

https://api.telegram.org/bot7343382434:AAHVbjA3UMvHkIXFmk_EqanDZDs1lJukPtw/sendMessage?chat_id=1867331552

Targets

    • Target

      Runtime Broker.exe

    • Size

      41KB

    • MD5

      3d8c8bdb3f9f8e2176e28bef2c32a872

    • SHA1

      c94ee52f063a8bcb37878a4a35f01e649a82d452

    • SHA256

      56abf6e0538aa01c4d703d318d6ab9d9f1d82a56e8327fa051af57c209270721

    • SHA512

      8ade0497a2f0d203c564fd90f7a370dc5c4c4bc6b2ec32d33da3d57897f4409b2857883aa3bb6c21276960035d07079422aaaf72987b9cce0e10efad77759138

    • SSDEEP

      768:zgBqG/D6Ykg+h5NMhllLW4pF5PM9lErl6TOwhp3tQj8:S3/D6A+hnErTFy9Wx6TOwPc8

    • Detect Xworm Payload

    • Gurcu family

    • Gurcu, WhiteSnake

      Gurcu aka WhiteSnake is a malware stealer written in C#.

    • 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

    • 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.

MITRE ATT&CK Enterprise v15

Tasks