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General

  • Target

    86cd0a58eaedcb942e0de56edabf72e747ab3f806fc31e3984e7d1657c069a72

  • Size

    1.8MB

  • Sample

    250324-ytt1ssvxax

  • MD5

    034e15527b8a528f14d030544dd7a137

  • SHA1

    9344252caff2af4bef435827c0bc88c1bd6aec56

  • SHA256

    86cd0a58eaedcb942e0de56edabf72e747ab3f806fc31e3984e7d1657c069a72

  • SHA512

    27f46fa25be1ddc7fcc95941acb0b3548774f1d3bbfc567c47847ee3832e37bedef88beed65a857afbedeb94873886b689762b4959db1c3e568387a64516704c

  • SSDEEP

    24576:sD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjoW7:sp7E+QrFUBgq2n7

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

      86cd0a58eaedcb942e0de56edabf72e747ab3f806fc31e3984e7d1657c069a72

    • Size

      1.8MB

    • MD5

      034e15527b8a528f14d030544dd7a137

    • SHA1

      9344252caff2af4bef435827c0bc88c1bd6aec56

    • SHA256

      86cd0a58eaedcb942e0de56edabf72e747ab3f806fc31e3984e7d1657c069a72

    • SHA512

      27f46fa25be1ddc7fcc95941acb0b3548774f1d3bbfc567c47847ee3832e37bedef88beed65a857afbedeb94873886b689762b4959db1c3e568387a64516704c

    • SSDEEP

      24576:sD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjoW7:sp7E+QrFUBgq2n7

    • 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