General

  • Target

    a7fab95ea927cb0689b8d40e1bb63790N.exe

  • Size

    2.2MB

  • Sample

    240910-3zfgta1fnl

  • MD5

    a7fab95ea927cb0689b8d40e1bb63790

  • SHA1

    0c76883e998efb9aca8604a00842d5a64960013c

  • SHA256

    d5ecd3f6efc58f4336dbf0682bf053114e84f95d4b37927eba9643b91e8f6789

  • SHA512

    c2d2995622352b6ffee6671de8a92138164e6e4c8c3b4d9680289a41b680fc1e4ff56b26b5ddefc758ca6d8f35708d334f524318ccb5c91dfff4791be30ae098

  • SSDEEP

    24576:sD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF49rOoBlZ:sp7E+QrFUBgq2f3Z

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

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

Targets

    • Target

      a7fab95ea927cb0689b8d40e1bb63790N.exe

    • Size

      2.2MB

    • MD5

      a7fab95ea927cb0689b8d40e1bb63790

    • SHA1

      0c76883e998efb9aca8604a00842d5a64960013c

    • SHA256

      d5ecd3f6efc58f4336dbf0682bf053114e84f95d4b37927eba9643b91e8f6789

    • SHA512

      c2d2995622352b6ffee6671de8a92138164e6e4c8c3b4d9680289a41b680fc1e4ff56b26b5ddefc758ca6d8f35708d334f524318ccb5c91dfff4791be30ae098

    • SSDEEP

      24576:sD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF49rOoBlZ:sp7E+QrFUBgq2f3Z

    • Remcos

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • 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