General

  • Target

    rufus-4.6.exe

  • Size

    1.5MB

  • Sample

    241120-hytylatglk

  • MD5

    8fe64da09af371b02a31828415ece8f3

  • SHA1

    5b5c90dcd425c814b555a4567405601aa977ee0b

  • SHA256

    8279696c1d78b14618500e9135886a3667b9decc65946f3729002e4bfdbb20ab

  • SHA512

    e49f9b1c9d33364101ad2fd4f2c5ed030700cc941bb469cf2ce7d5b32c51cab9e62b265e05cbd92435453e7e4008c9990bea532298676f7d81e5d6dcdc2f590b

  • SSDEEP

    24576:H8U9+A6KdMt7ZRuYfuv9dTWGNj0GvXFGfkRssBUEt3kRQrf7zSIBDICweAVdEY2Y:cUUvltf6SGd/FGfIsTE665h0dEY2nY

Malware Config

Targets

    • Target

      rufus-4.6.exe

    • Size

      1.5MB

    • MD5

      8fe64da09af371b02a31828415ece8f3

    • SHA1

      5b5c90dcd425c814b555a4567405601aa977ee0b

    • SHA256

      8279696c1d78b14618500e9135886a3667b9decc65946f3729002e4bfdbb20ab

    • SHA512

      e49f9b1c9d33364101ad2fd4f2c5ed030700cc941bb469cf2ce7d5b32c51cab9e62b265e05cbd92435453e7e4008c9990bea532298676f7d81e5d6dcdc2f590b

    • SSDEEP

      24576:H8U9+A6KdMt7ZRuYfuv9dTWGNj0GvXFGfkRssBUEt3kRQrf7zSIBDICweAVdEY2Y:cUUvltf6SGd/FGfIsTE665h0dEY2nY

    • Jigsaw Ransomware

      Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

    • Jigsaw family

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Renames multiple (4027) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Drops file in Drivers directory

    • Modifies RDP port number used by Windows

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Impair Defenses: Safe Mode Boot

    • Adds Run key to start application

    • 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

    • Enumerates connected drives

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

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

    • Legitimate hosting services abused for malware hosting/C2

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

    • Drops file in System32 directory

    • 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.

    • Modifies WinLogon for persistence

    • Sets desktop wallpaper using registry

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v15

Tasks