General

  • Target
    24112025_1523_24112025_PO_2025120411.7z
  • Size 4KB
  • Sample251124-sshngsgn8x
  • SHA256 f3edffd1b31e4ecbe7d2e039d2f81c9fbc686deee3530e1bf4402ac66a27abb5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    https://ia801704.us.archive.org/5/items/optimized_msi_20251120_0120/optimized_MSI.png

  • exe.dropper

    https://ia801704.us.archive.org/5/items/optimized_msi_20251120_0120/optimized_MSI.png

Extracted

Family
  • remcos

Version
  • 7.1.0 Pro

Botnet
  • RemoteHost

C2
  • nexlunix.com:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-FHS81F

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target
      PO_2025120411.js
    • Size 6.2MB
    • SHA256 91fbbeeabc4a26a51b4ae6b1e1f89c987e1c066c6a396ab3efbcd7abf00903bb
    • MD5 SHA1 SHA512 SSDEEP
    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Remcos

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

    • Remcos family

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Uses browser remote debugging

      Can be used control the browser and steal sensitive information such as credentials and session cookies.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook accounts

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks