General

  • Target

    7a7d25a7540c0debb1d8a12b3450f4cfae6a9b2aaa8a71a4000243d93be6d18bN.exe

  • Size

    1.5MB

  • Sample

    250205-vlwmwaxpfn

  • MD5

    027523c31bd4e4288d2170296a3521b0

  • SHA1

    694855bed9bdf7c202431fc238f349d70190e487

  • SHA256

    7a7d25a7540c0debb1d8a12b3450f4cfae6a9b2aaa8a71a4000243d93be6d18b

  • SHA512

    05f0e1a2706d239c3e6b74237ac750cc94dbd55bda407cb965d85ccdb116e9f7884a5aefbb750eba56dc1412131081b5cb1cdf8811b0300b32ebdbfb0706dcb6

  • SSDEEP

    24576:+D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqk:+F+QrFUBgq25eKq

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

      7a7d25a7540c0debb1d8a12b3450f4cfae6a9b2aaa8a71a4000243d93be6d18bN.exe

    • Size

      1.5MB

    • MD5

      027523c31bd4e4288d2170296a3521b0

    • SHA1

      694855bed9bdf7c202431fc238f349d70190e487

    • SHA256

      7a7d25a7540c0debb1d8a12b3450f4cfae6a9b2aaa8a71a4000243d93be6d18b

    • SHA512

      05f0e1a2706d239c3e6b74237ac750cc94dbd55bda407cb965d85ccdb116e9f7884a5aefbb750eba56dc1412131081b5cb1cdf8811b0300b32ebdbfb0706dcb6

    • SSDEEP

      24576:+D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqk:+F+QrFUBgq25eKq

    • 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