General

  • Target
    DECODE.cmd
  • Size 45B
  • Sample240622-ejba6axanh
  • SHA256 b1c0500a672ae53b1b166ee3840d0bfdc072ebce461c6b5d0343d5d46a7bead2
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • xworm

C2
  • 147.185.221.18:41012

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USBhelper.exe

Extracted

Family
  • xworm

Version
  • 3.1

C2
  • adult-purchased.gl.at.ply.gg:13795

Mutex
  • JkvPSJefttV1yu2t

Attributes
  • install_file

    USB.exe

aes.plain

Targets

    • Target
      DECODE.cmd
    • Size 45B
    • SHA256 b1c0500a672ae53b1b166ee3840d0bfdc072ebce461c6b5d0343d5d46a7bead2
    • MD5 SHA1 SHA512
    • Detect Xworm Payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Drops startup file

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks