General

  • Target

    MasonClient.exe

  • Size

    50KB

  • Sample

    250302-2w8hraykx5

  • MD5

    7eecbfee976f4b6944cce2362d532266

  • SHA1

    5996357ec345f0feeb14bd79f54392cc3075cb59

  • SHA256

    33390c4e76ef805c8f426b64803265cffacb3e5b49c2fe44eecb6e125e8dcd23

  • SHA512

    cb7c952963d14efd16f6752d49481072218d67fcd6decfb43fa000fe139bcb7a22e62087613fad021c83ad0867937db24d70b54eaed9b8321f087494ea39a97f

  • SSDEEP

    768:BIXLzBU97JP7LzxqMIEmOVjWjlbQ0eiVQGit/X6DlvuhJOWCAzuV:BIbzq91P73E3ESBbQ0ex/hbOW5uV

Malware Config

Extracted

Family

xworm

Attributes
  • install_file

    USB.exe

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe

exe.dropper

https://raw.githubusercontent.com/ninhpn1337/Disable-Windows-Defender/main/source.bat

Targets

    • Target

      MasonClient.exe

    • Size

      50KB

    • MD5

      7eecbfee976f4b6944cce2362d532266

    • SHA1

      5996357ec345f0feeb14bd79f54392cc3075cb59

    • SHA256

      33390c4e76ef805c8f426b64803265cffacb3e5b49c2fe44eecb6e125e8dcd23

    • SHA512

      cb7c952963d14efd16f6752d49481072218d67fcd6decfb43fa000fe139bcb7a22e62087613fad021c83ad0867937db24d70b54eaed9b8321f087494ea39a97f

    • SSDEEP

      768:BIXLzBU97JP7LzxqMIEmOVjWjlbQ0eiVQGit/X6DlvuhJOWCAzuV:BIbzq91P73E3ESBbQ0ex/hbOW5uV

    • Detect Xworm Payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Sets service image path in registry

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks