General

  • Target

    1d4ab01e60e8a249065a033140266ba6352eb21be73c0bd625ccb6881152db39.exe

  • Size

    1.5MB

  • Sample

    250205-maek8asjft

  • MD5

    d9917d45e9c92f10c148b7cdf3a4a54e

  • SHA1

    230b29f575e5a203f0ed6ae37ac0f4bc2eca14ee

  • SHA256

    1d4ab01e60e8a249065a033140266ba6352eb21be73c0bd625ccb6881152db39

  • SHA512

    fd8618b7b4f13e1ebbb2d6cc29ee2c9709c652052318dab2d2f4d558bbede2ba16c58a93e436bbb6e89d80095568e650eab131bb859f2437ff7f1235f160b129

  • SSDEEP

    24576:+D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWq8:+F+QrFUBgq25eKe

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

      1d4ab01e60e8a249065a033140266ba6352eb21be73c0bd625ccb6881152db39.exe

    • Size

      1.5MB

    • MD5

      d9917d45e9c92f10c148b7cdf3a4a54e

    • SHA1

      230b29f575e5a203f0ed6ae37ac0f4bc2eca14ee

    • SHA256

      1d4ab01e60e8a249065a033140266ba6352eb21be73c0bd625ccb6881152db39

    • SHA512

      fd8618b7b4f13e1ebbb2d6cc29ee2c9709c652052318dab2d2f4d558bbede2ba16c58a93e436bbb6e89d80095568e650eab131bb859f2437ff7f1235f160b129

    • SSDEEP

      24576:+D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWq8:+F+QrFUBgq25eKe

    • 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