General

  • Target

    48636ac6e9bd609bc8f2bbfe157084dd91acc90da6153f8a544a70a24e53a543

  • Size

    1.5MB

  • Sample

    241219-3cvyzstkgk

  • MD5

    a8bb2b3d9ea6cef43fd1b023d374de4b

  • SHA1

    099988309812569af57af98437c54e840d0283b9

  • SHA256

    48636ac6e9bd609bc8f2bbfe157084dd91acc90da6153f8a544a70a24e53a543

  • SHA512

    96e2ae00e65f6a256f82a3dd4fd4a89badaf262c4ed0a4333441dcc106fb877b3a9a12bad8836036f17e70408e990375fe186cf833fa197c81a1f99f761f991c

  • SSDEEP

    24576:LD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJdD:LF+QrFUBgq25eKDD

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

      48636ac6e9bd609bc8f2bbfe157084dd91acc90da6153f8a544a70a24e53a543

    • Size

      1.5MB

    • MD5

      a8bb2b3d9ea6cef43fd1b023d374de4b

    • SHA1

      099988309812569af57af98437c54e840d0283b9

    • SHA256

      48636ac6e9bd609bc8f2bbfe157084dd91acc90da6153f8a544a70a24e53a543

    • SHA512

      96e2ae00e65f6a256f82a3dd4fd4a89badaf262c4ed0a4333441dcc106fb877b3a9a12bad8836036f17e70408e990375fe186cf833fa197c81a1f99f761f991c

    • SSDEEP

      24576:LD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJdD:LF+QrFUBgq25eKDD

    • 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