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General

  • Target

    NEAS.1109042c3f41ad8b2b37562004c61130_JC.exe

  • Size

    1.1MB

  • Sample

    231104-3tz92aae25

  • MD5

    1109042c3f41ad8b2b37562004c61130

  • SHA1

    b198c98a92b13396bf7de61487d61e86bc6a13d4

  • SHA256

    115eecb607fdaf63fa831cc0ec169c2efa99a31f690ba2d43ebe15c58d958a42

  • SHA512

    5be01e9d10904fbda94e9d92dd86ffbb7033a77d9d6880f5759cdb04b9b01339728319b61f1d9378423b2ffa513d615385258d546ef0ca8c1b4e9e4edd5145c1

  • SSDEEP

    12288:OfeDOa9rDeYSorINpj5XqkJD0QrOod7XxlW91RRep+rgRNyA55IxJ2DJ53J/J/Z:FD39v74lfGQrFUspugRNJI2DJ53J/J/Z

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

      NEAS.1109042c3f41ad8b2b37562004c61130_JC.exe

    • Size

      1.1MB

    • MD5

      1109042c3f41ad8b2b37562004c61130

    • SHA1

      b198c98a92b13396bf7de61487d61e86bc6a13d4

    • SHA256

      115eecb607fdaf63fa831cc0ec169c2efa99a31f690ba2d43ebe15c58d958a42

    • SHA512

      5be01e9d10904fbda94e9d92dd86ffbb7033a77d9d6880f5759cdb04b9b01339728319b61f1d9378423b2ffa513d615385258d546ef0ca8c1b4e9e4edd5145c1

    • SSDEEP

      12288:OfeDOa9rDeYSorINpj5XqkJD0QrOod7XxlW91RRep+rgRNyA55IxJ2DJ53J/J/Z:FD39v74lfGQrFUspugRNJI2DJ53J/J/Z

    • Remcos

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

    • 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