General

  • Target

    c7641a93554e98436e4eebf117022344e53f3bdb950bd1ba2f2acbecbb8866f0

  • Size

    372KB

  • Sample

    250215-gmz5sswlc1

  • MD5

    03d608cc917542153e67be383b580a28

  • SHA1

    f14e97712b6cf8b58e34106de4c40da86b78710a

  • SHA256

    c7641a93554e98436e4eebf117022344e53f3bdb950bd1ba2f2acbecbb8866f0

  • SHA512

    fa99987e648ebb55802ab21b15c6e68b7c236a7c4d98ad05435255387e676aac6bc3fe9246b9615965f3412e260ab42af77f52beb5c76defebe6bfc4c76038e3

  • SSDEEP

    6144:tVdgUkQx+HXGidCzj8LBb8Rw5Jdypyf6aCXYfhim+:t3qQx+H2i+8LBNbdypazCXYI

Malware Config

Extracted

Family

remcos

Version

2.4.3 Pro

Botnet

TINo

C2

185.140.53.140:2404

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

    true

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-5S9O07

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      c7641a93554e98436e4eebf117022344e53f3bdb950bd1ba2f2acbecbb8866f0

    • Size

      372KB

    • MD5

      03d608cc917542153e67be383b580a28

    • SHA1

      f14e97712b6cf8b58e34106de4c40da86b78710a

    • SHA256

      c7641a93554e98436e4eebf117022344e53f3bdb950bd1ba2f2acbecbb8866f0

    • SHA512

      fa99987e648ebb55802ab21b15c6e68b7c236a7c4d98ad05435255387e676aac6bc3fe9246b9615965f3412e260ab42af77f52beb5c76defebe6bfc4c76038e3

    • SSDEEP

      6144:tVdgUkQx+HXGidCzj8LBb8Rw5Jdypyf6aCXYfhim+:t3qQx+H2i+8LBNbdypazCXYI

    • Modifies WinLogon for persistence

    • Remcos

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

    • Remcos family

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Modifies WinLogon

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks