General

  • Target

    c791f1b7d5778fe52f16e07a66769b5ead35245824f7dcf00bcb7b493aa635cd

  • Size

    846KB

  • Sample

    240909-2hzcxswbmd

  • MD5

    48f0252983cfcb43fbaac7367ff07463

  • SHA1

    477e14eec322f9aeb32af4d23758ec0baa0bc472

  • SHA256

    c791f1b7d5778fe52f16e07a66769b5ead35245824f7dcf00bcb7b493aa635cd

  • SHA512

    407ecbf6084c596bdc7126ae5b03e717a05c4580bb07aef9b2e20ec9e81d7e83549a8c9768fdb90403e4814d3134d67e31a7ce5cc816887001af424933af5435

  • SSDEEP

    24576:WJvbd/yIow5NNeGPz6TA1iObYFA98vyx0bglPh0:Cx6IF5je2z6TATqvyugth0

Malware Config

Extracted

Family

remcos

Botnet

IRN

C2

irnserv1.ddns.net:4424

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-CA8761

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      TNT invoice.exe

    • Size

      883KB

    • MD5

      054306ece8b6f161c94e7cb68d8bd9e6

    • SHA1

      5b49d309162f9308baa6aa4e85931c85ec3eb909

    • SHA256

      f9f95960ec195d7f883e4b3d5d75c26cd9f7dc7fbe8eef76d493ab6cc149e898

    • SHA512

      f1ee8d8f986ef4e5b30ac8f9b262243e93cade9267b3c024d2b5787d6c5bc87b8eadb5200c5f65959f969c57b735b2446093b8891da066042cd413f489e62ca6

    • SSDEEP

      24576:paUd4rdMqIdKWA5RUzENN1UcrZT216UHSF698lLUE7zvkE:TyrdlUzEjxZT2HIlLk

    • Remcos

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • 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