TTP Tuesday: Ransomware (Release 1)

Linux Ransomware using Live off the Land (LotL) Tools

Theme Overview

14 December 2021

Our current theme is ransomware, focusing on scenarios where threats use live off the land (LotL) binaries and custom payloads to accomplish their objectives. The ransomware theme will contain the following kill-chains:

1. Linux Ransomware using Live off the Land (LotL) Tools (Current Release)

2. Windows Ransomware using Live off the Land (LotL) Tools

3. Linux Ransomware using Custom Tools

4. Windows Ransomware using Custom Tools

Linux Ransomware using Live off the Land (LotL) Tools

This week's kill chain focuses on using native binaries available in Kali (Debian) Linux in order to perform a ransomware attack. We discover the current user's home directory and recursively compress it with the zip binary and a randomly generated password.

Check it out on the Prelude chains website.

Watch a demonstration:

Next week, we will be applying similar LotL methodology to create a Windows version of the kill chain. It will leverage native Windows system tools to discover and encrypt sensitive files and folders.

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