General

  • Target

    e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN

  • Size

    2.1MB

  • Sample

    240918-ll45kstekf

  • MD5

    d365bdd9aae938e7e7f01e64539c55d0

  • SHA1

    88fa077545b9d3470047a93b0a60733826c84ac8

  • SHA256

    e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5b

  • SHA512

    27728711291d0a5bcffb8f66706efcc310caa504dbfa24f4cd8342c2ec05fbb27b22ed7c5b889908621ef1cd686a57657c57a88e36d2715f7d7afd99d6bba026

  • SSDEEP

    24576:bD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRH7:bp7E+QrFUBgq2SnJ7

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

      e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN

    • Size

      2.1MB

    • MD5

      d365bdd9aae938e7e7f01e64539c55d0

    • SHA1

      88fa077545b9d3470047a93b0a60733826c84ac8

    • SHA256

      e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5b

    • SHA512

      27728711291d0a5bcffb8f66706efcc310caa504dbfa24f4cd8342c2ec05fbb27b22ed7c5b889908621ef1cd686a57657c57a88e36d2715f7d7afd99d6bba026

    • SSDEEP

      24576:bD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRH7:bp7E+QrFUBgq2SnJ7

    • Remcos

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • 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