General

  • Target

    136ef22d5bfdda144756cd42f15a285b46af11a95f823bfe13f7993c72e23e94

  • Size

    1020KB

  • Sample

    241222-ymjaqaxpcj

  • MD5

    cf267581be8473ea55c73b833a6e0dad

  • SHA1

    b1c43239677655b821f290dbbf1be560fbbeaca9

  • SHA256

    136ef22d5bfdda144756cd42f15a285b46af11a95f823bfe13f7993c72e23e94

  • SHA512

    3d65fb0a6536977dc30a545b018f02ebd6be27c3f4da34fac6ed55716ff83996e9f493f2497ce6f8b8e0a71a84c7b79dad3f4e3ca40e84b723bdda4592583938

  • SSDEEP

    12288:1feDOa9rDeYSorINpj5XqkJD0QrOod7XxlW91RRep+rgRNyA55IxJ2DWzzY8:ED39v74lfGQrFUspugRNJI2DWzz9

Malware Config

Extracted

Family

remcos

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

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

      136ef22d5bfdda144756cd42f15a285b46af11a95f823bfe13f7993c72e23e94

    • Size

      1020KB

    • MD5

      cf267581be8473ea55c73b833a6e0dad

    • SHA1

      b1c43239677655b821f290dbbf1be560fbbeaca9

    • SHA256

      136ef22d5bfdda144756cd42f15a285b46af11a95f823bfe13f7993c72e23e94

    • SHA512

      3d65fb0a6536977dc30a545b018f02ebd6be27c3f4da34fac6ed55716ff83996e9f493f2497ce6f8b8e0a71a84c7b79dad3f4e3ca40e84b723bdda4592583938

    • SSDEEP

      12288:1feDOa9rDeYSorINpj5XqkJD0QrOod7XxlW91RRep+rgRNyA55IxJ2DWzzY8:ED39v74lfGQrFUspugRNJI2DWzz9

    • Remcos

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

    • Remcos family

    • 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