General

  • Target

    b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN

  • Size

    2.2MB

  • Sample

    240927-vq21fssdnm

  • MD5

    a5772d2e4b88816004fd474cae1424e0

  • SHA1

    1dca21ff19ce0b88347cb62bd8f6b3851fd47a62

  • SHA256

    b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edc

  • SHA512

    e96769e11290a709a77f8eb183f16bb06f37c68bc255ef2bc2a5d56e63cde4aaf35918c1d41f87cc075e840650b3199cb49a3ba473aedadd218df6ae3211bf89

  • SSDEEP

    24576:XD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJJ7:Xp7E+QrFUBgq2Snx

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

      b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN

    • Size

      2.2MB

    • MD5

      a5772d2e4b88816004fd474cae1424e0

    • SHA1

      1dca21ff19ce0b88347cb62bd8f6b3851fd47a62

    • SHA256

      b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edc

    • SHA512

      e96769e11290a709a77f8eb183f16bb06f37c68bc255ef2bc2a5d56e63cde4aaf35918c1d41f87cc075e840650b3199cb49a3ba473aedadd218df6ae3211bf89

    • SSDEEP

      24576:XD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJJ7:Xp7E+QrFUBgq2Snx

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • 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