General

  • Target

    b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692

  • Size

    1.9MB

  • Sample

    250330-zhex6syps3

  • MD5

    43cb13d13f2590f07d16013ee6bc164d

  • SHA1

    e66f702be42e38f06a004db0b26be4629a2f79d1

  • SHA256

    b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692

  • SHA512

    2afcf8eee71c168f562f3c599ea5b880a672f0e6e4439934972d9fd9a01bf4dd967bb600898f0f626440c53d5cb327c873cdfef8487938b854f38a1ae1af451a

  • SSDEEP

    24576:AD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6jv1:AF+QrFUBgq25eKu6jv1

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692

    • Size

      1.9MB

    • MD5

      43cb13d13f2590f07d16013ee6bc164d

    • SHA1

      e66f702be42e38f06a004db0b26be4629a2f79d1

    • SHA256

      b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692

    • SHA512

      2afcf8eee71c168f562f3c599ea5b880a672f0e6e4439934972d9fd9a01bf4dd967bb600898f0f626440c53d5cb327c873cdfef8487938b854f38a1ae1af451a

    • SSDEEP

      24576:AD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6jv1:AF+QrFUBgq25eKu6jv1

    • Remcos

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

    • Remcos family

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks