General

  • Target

    MasonSpoofer.exe

  • Size

    54KB

  • Sample

    250305-tf782ssny4

  • MD5

    4d0c7560ec5c28a513a9fde9838547e8

  • SHA1

    66393d9c9e6b3a9f4d38b6bc9161d28e7a7b2ffd

  • SHA256

    eed83e7510bd8497fad0f0b65455e8afa0531b9833357ad75934ff8df0a7896a

  • SHA512

    77df7c7dcd8a29cc8c83c074902e90f0f3ade77ca726ef33c543c8877112f5f5ea424ff003d720f3ddc9ec8683d712dcc9760b9e22b89fcfaa5f5ea2409fac11

  • SSDEEP

    1536:vi5XmXObBvFn2TzqbLho8I/HusbOznuf:vcvF2SbLhu/HusbOzuf

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %port%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/J42c6s7r

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

      MasonSpoofer.exe

    • Size

      54KB

    • MD5

      4d0c7560ec5c28a513a9fde9838547e8

    • SHA1

      66393d9c9e6b3a9f4d38b6bc9161d28e7a7b2ffd

    • SHA256

      eed83e7510bd8497fad0f0b65455e8afa0531b9833357ad75934ff8df0a7896a

    • SHA512

      77df7c7dcd8a29cc8c83c074902e90f0f3ade77ca726ef33c543c8877112f5f5ea424ff003d720f3ddc9ec8683d712dcc9760b9e22b89fcfaa5f5ea2409fac11

    • SSDEEP

      1536:vi5XmXObBvFn2TzqbLho8I/HusbOznuf:vcvF2SbLhu/HusbOzuf

    • 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

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks