General

  • Target

    Tax_Refund_Claim_2024_Australian_Taxation_Office.js

  • Size

    163KB

  • Sample

    250105-jccymayqhj

  • MD5

    a99ac2b0c9df4fc8b76f1c96bfce311c

  • SHA1

    3cbdd7d89a4d57005496a40cf1bf9a43e41f2635

  • SHA256

    496328b2630e631422e0e62da0ca876b54801a963c8e71ad79c0c4e20165999c

  • SHA512

    8d64a90a5ad998f1ccc7f490f4c494f96c2291fb53254cf1394e9ab7cee62cbe281b9d2d3ab4f7a945d2804744f21d83d4c5f3361dbc3f49958666f128dd0a10

  • SSDEEP

    1536:4zWfDq6wXS9V329iMiHQWpxE7EqU+GOK44nFlWETMJWlR4gqzDe/zQ6V2YrzJ50l:4zWf+6wC9I3iJAZafzQ6VdzjiI2fx

Malware Config

Extracted

Language
ps1
Source
URLs
ps1.dropper

https://res.cloudinary.com/dnkr4s5yg/image/upload/v1735420882/givvuo2katk3jnggipgn.jpg%20

exe.dropper

https://res.cloudinary.com/dnkr4s5yg/image/upload/v1735420882/givvuo2katk3jnggipgn.jpg%20

Extracted

Family

remcos

Botnet

chesguyce

C2

195.133.78.18:7346

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    fyhstga-ONSWMZ

  • 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

      Tax_Refund_Claim_2024_Australian_Taxation_Office.js

    • Size

      163KB

    • MD5

      a99ac2b0c9df4fc8b76f1c96bfce311c

    • SHA1

      3cbdd7d89a4d57005496a40cf1bf9a43e41f2635

    • SHA256

      496328b2630e631422e0e62da0ca876b54801a963c8e71ad79c0c4e20165999c

    • SHA512

      8d64a90a5ad998f1ccc7f490f4c494f96c2291fb53254cf1394e9ab7cee62cbe281b9d2d3ab4f7a945d2804744f21d83d4c5f3361dbc3f49958666f128dd0a10

    • SSDEEP

      1536:4zWfDq6wXS9V329iMiHQWpxE7EqU+GOK44nFlWETMJWlR4gqzDe/zQ6V2YrzJ50l:4zWf+6wC9I3iJAZafzQ6VdzjiI2fx

    • Remcos

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

    • Remcos family

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Blocklisted process makes network request

    • Uses browser remote debugging

      Can be used control the browser and steal sensitive information such as credentials and session cookies.

    • Checks computer location settings

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

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks