General

  • Target

    412300061474·pdf.vbs

  • Size

    16KB

  • Sample

    241125-kmklwsyjf1

  • MD5

    66e9e95985918197cabcedecef2d981d

  • SHA1

    4d3acf394fc1825d1f89905ff9950cfc297d813a

  • SHA256

    4ee92a6f7eee02311151d4e57a6b22e18d610a214b4a6274ffd73d3ce7fdb759

  • SHA512

    16efce7ecf0dae7fa63030b404ea60b2801119df2297b05ceba7b7ba0e3d90d3145b2e34f005a10deb78f50b2445498b2d9936f5c33582e0415160cfb8b6b6f9

  • SSDEEP

    384:yMEYHgUWl/aKYbYHfQl3pngujAtHKeGEa47Yi+c:mYHgUWgKrHfSNgujAhGEhYi/

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

5nd42h78s.duckdns.org:3782

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

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-J5NDOL

  • 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

      412300061474·pdf.vbs

    • Size

      16KB

    • MD5

      66e9e95985918197cabcedecef2d981d

    • SHA1

      4d3acf394fc1825d1f89905ff9950cfc297d813a

    • SHA256

      4ee92a6f7eee02311151d4e57a6b22e18d610a214b4a6274ffd73d3ce7fdb759

    • SHA512

      16efce7ecf0dae7fa63030b404ea60b2801119df2297b05ceba7b7ba0e3d90d3145b2e34f005a10deb78f50b2445498b2d9936f5c33582e0415160cfb8b6b6f9

    • SSDEEP

      384:yMEYHgUWl/aKYbYHfQl3pngujAtHKeGEa47Yi+c:mYHgUWgKrHfSNgujAhGEhYi/

    • Remcos

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

    • Remcos family

    • UAC bypass

    • 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

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Blocklisted process makes network request

    • 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.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks