General

  • Target

    Document BT24·pdf.vbs

  • Size

    33KB

  • Sample

    241128-vtnx1atpgt

  • MD5

    b9d77e317447cf7b4fc1b538d04a35d7

  • SHA1

    4bfff79ba434d7c5a508f9ba2720f4ef47cfecec

  • SHA256

    1e74e14032fe7b84a6285d72cfea681f4ec1d0bffe896f02fac5f0c5e5b96060

  • SHA512

    9691361f42668c8dcf9764ac86ad355c5039ca927140ce732452cba7df12bad70ff46c87c54cd8ae6e6cf4673e3bc57894663c8b301f0e40344c0b21dab20ce7

  • SSDEEP

    768:EA9as2DrXeg09BTUUsKNq4Hm8hZn6TgXzwbVV+E2rEJ9YnCmw6fd:D9asyevU844HT/6azCkE2oJIu6d

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

8766e34g8.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-93TSMD

  • 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

      Document BT24·pdf.vbs

    • Size

      33KB

    • MD5

      b9d77e317447cf7b4fc1b538d04a35d7

    • SHA1

      4bfff79ba434d7c5a508f9ba2720f4ef47cfecec

    • SHA256

      1e74e14032fe7b84a6285d72cfea681f4ec1d0bffe896f02fac5f0c5e5b96060

    • SHA512

      9691361f42668c8dcf9764ac86ad355c5039ca927140ce732452cba7df12bad70ff46c87c54cd8ae6e6cf4673e3bc57894663c8b301f0e40344c0b21dab20ce7

    • SSDEEP

      768:EA9as2DrXeg09BTUUsKNq4Hm8hZn6TgXzwbVV+E2rEJ9YnCmw6fd:D9asyevU844HT/6azCkE2oJIu6d

    • 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

    • 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