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General

  • Target

    e8ac066c7ab1488bd85ab48385c6f09820e35aa97473fe94e933f87364c23a4c

  • Size

    930KB

  • Sample

    250323-zc5awayly8

  • MD5

    f2982dba65abe4f02b76140f894b652d

  • SHA1

    3b847314476ed012df7dcd636ee1186dcd35b729

  • SHA256

    e8ac066c7ab1488bd85ab48385c6f09820e35aa97473fe94e933f87364c23a4c

  • SHA512

    aa3e403d593225ceaf9e1e02f4c6e3d44ee3fa46edaa54281bbfa28c0795e46a22469b43f986dd618dca4dc4a054b031c3815ff37dd4eb3421c08216f1aa8902

  • SSDEEP

    12288:sp+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRz9Mt:spugRNJI1D39dlfGQrFUx9Mt

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

      e8ac066c7ab1488bd85ab48385c6f09820e35aa97473fe94e933f87364c23a4c

    • Size

      930KB

    • MD5

      f2982dba65abe4f02b76140f894b652d

    • SHA1

      3b847314476ed012df7dcd636ee1186dcd35b729

    • SHA256

      e8ac066c7ab1488bd85ab48385c6f09820e35aa97473fe94e933f87364c23a4c

    • SHA512

      aa3e403d593225ceaf9e1e02f4c6e3d44ee3fa46edaa54281bbfa28c0795e46a22469b43f986dd618dca4dc4a054b031c3815ff37dd4eb3421c08216f1aa8902

    • SSDEEP

      12288:sp+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRz9Mt:spugRNJI1D39dlfGQrFUx9Mt

    • 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