General

  • Target

    d9b0cdd1131c5686c45b57bd4b9663a5089ae14df0d3e967f9df4a76278761e2

  • Size

    1.4MB

  • Sample

    241227-dwecxa1ket

  • MD5

    c8a1a34d11e4eda342918ebcde115dc1

  • SHA1

    329810357b607684c49821fa13ddf6af8cfa0375

  • SHA256

    d9b0cdd1131c5686c45b57bd4b9663a5089ae14df0d3e967f9df4a76278761e2

  • SHA512

    cd0032f6ddf20ad4dbb94dbc67fb154e8874d322888cb34d19b2a48dd11aa03ab881a5a77251b713a05ef8db8891fa7f6e9e64ec80a8205fa90bb357bd50f1f7

  • SSDEEP

    24576:4D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJq:4F+QrFUBgq25eKk

Malware Config

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

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

Targets

    • Target

      d9b0cdd1131c5686c45b57bd4b9663a5089ae14df0d3e967f9df4a76278761e2

    • Size

      1.4MB

    • MD5

      c8a1a34d11e4eda342918ebcde115dc1

    • SHA1

      329810357b607684c49821fa13ddf6af8cfa0375

    • SHA256

      d9b0cdd1131c5686c45b57bd4b9663a5089ae14df0d3e967f9df4a76278761e2

    • SHA512

      cd0032f6ddf20ad4dbb94dbc67fb154e8874d322888cb34d19b2a48dd11aa03ab881a5a77251b713a05ef8db8891fa7f6e9e64ec80a8205fa90bb357bd50f1f7

    • SSDEEP

      24576:4D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJq:4F+QrFUBgq25eKk

    • 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