General

  • Target
    522822101e4aa4be512cd0ac6e1fcc8247711ade9626062d677247d04af62eda.bin
  • Size 215.6MB
  • Sample260822-nfxvesx1ex
  • SHA256 522822101e4aa4be512cd0ac6e1fcc8247711ade9626062d677247d04af62eda
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

C2
  • 172.111.198.190:7651

Attributes
  • Install_directory

    %Temp%

  • install_file

    Microsoft Copilot.exe

Extracted

Family
  • remcos

Version
  • 3.8.0 Pro

Botnet
  • Copilot

C2
  • 172.111.198.190:7823

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Microsoft Copilot.exe

  • copy_folder

    Local

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %Temp%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    reg-0CXHDW

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Microsoft Copilot

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family
  • remcos

Botnet
  • Copilot

C2
  • 172.111.198.190:7823

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Microsoft Copilot.exe

  • copy_folder

    Local

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %Temp%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    reg-0CXHDW

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Microsoft Copilot

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target
      522822101e4aa4be512cd0ac6e1fcc8247711ade9626062d677247d04af62eda.bin
    • Size 215.6MB
    • SHA256 522822101e4aa4be512cd0ac6e1fcc8247711ade9626062d677247d04af62eda
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Family: Remcos

      Remcos is a closed-source remote control and surveillance software.

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Adds policy Run key to start application

    • Command and Scripting Interpreter: PowerShell

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

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to make their binary seem validly signed.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • Executes dropped EXE

    • Adds Run key to start application

    • Executes a VBScript file via the Windows Script Host.

    • Probable phishing domain

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks