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General

  • Target

    https://158.69.36.15/files/estrouvinhar.js

  • Sample

    241129-r9vtpswkcn

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://3105.filemail.com/api/file/get?filekey=tZ0A8AkaCfHVyJQGBGtNyLc0256wc-f0oI-T-w6PIjdTYIYQJd8Mux_T_T5g9jEmfO3a&skipreg=true&pk_vid=e0109638c9bfb9571732531514b5ff7c

exe.dropper

https://3105.filemail.com/api/file/get?filekey=tZ0A8AkaCfHVyJQGBGtNyLc0256wc-f0oI-T-w6PIjdTYIYQJd8Mux_T_T5g9jEmfO3a&skipreg=true&pk_vid=e0109638c9bfb9571732531514b5ff7c

Targets

    • FFDroider

      Stealer targeting social media platform users first seen in April 2022.

    • Ffdroider family

    • Modifies visibility of file extensions in Explorer

    • Blocklisted process makes network request

    • Boot or Logon Autostart Execution: Active Setup

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Drops startup file

    • 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

    • Impair Defenses: Safe Mode Boot

    • Loads dropped DLL

    • Modifies system executable filetype association

    • 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

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks