Overview

overview

10

Static

static

1

License au...2).xls

windows7-x64

10

License au...2).xls

windows10-2004-x64

1

Sharing

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General

  • Target
    License authorization Custom invoice INFO - Factura Aduana INFO (2).xls
  • Size 296KB
  • Sample240510-jmkffsee45
  • SHA256 ae6999b1df3c18825cbfbc77d9c5f4e639d626640e5ffb3d290611878feda9e1
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
remcosremotehostexecutionpersistencerat

Malware Config

Extracted

Family

  • remcos

Botnet

  • RemoteHost

C2

  • sembe.duckdns.org:14645

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

    false

  • keylog_crypt

    false

  • keylog_file

    nots.dat

  • keylog_flag

    false

  • keylog_folder

    note

  • keylog_path

    %Temp%

  • mouse_option

    false

  • mutex

    Rmc-999Z97

  • 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
      License authorization Custom invoice INFO - Factura Aduana INFO (2).xls
    • Size 296KB
    • SHA256 ae6999b1df3c18825cbfbc77d9c5f4e639d626640e5ffb3d290611878feda9e1
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    remcosremotehostexecutionpersistencerat

    • Remcos

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

      ratremcos

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Abuses OpenXML format to download file from external location

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks