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General

  • Target

    c1cc4223b12a814a2d19675c084249c04100240f27991e48853c7e20ef31efee

  • Size

    1007KB

  • Sample

    250324-zfk2eav1c1

  • MD5

    9ff5ddda0a7d217532a2eb90cd4d225a

  • SHA1

    b44daaaa318897d6239412308a3aecad6a564316

  • SHA256

    c1cc4223b12a814a2d19675c084249c04100240f27991e48853c7e20ef31efee

  • SHA512

    49e6aab1b93f7897018f4d3f3eaf21b614233368453b77a7c2ec0765a5463c366476f8096ca0b11bcff82731ddf268d67ea08409e68a7cdc58cdf9b82b50586d

  • SSDEEP

    12288:Gp+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRzwAY3AzC31:GpugRNJI1D39dlfGQrFUxwAeAzC31

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

      c1cc4223b12a814a2d19675c084249c04100240f27991e48853c7e20ef31efee

    • Size

      1007KB

    • MD5

      9ff5ddda0a7d217532a2eb90cd4d225a

    • SHA1

      b44daaaa318897d6239412308a3aecad6a564316

    • SHA256

      c1cc4223b12a814a2d19675c084249c04100240f27991e48853c7e20ef31efee

    • SHA512

      49e6aab1b93f7897018f4d3f3eaf21b614233368453b77a7c2ec0765a5463c366476f8096ca0b11bcff82731ddf268d67ea08409e68a7cdc58cdf9b82b50586d

    • SSDEEP

      12288:Gp+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRzwAY3AzC31:GpugRNJI1D39dlfGQrFUxwAeAzC31

    • 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