Category Archives: Incident Response

Intro to Threat Intelligence with Bro and ELK

One of the biggest trends in cyber security is threat intelligence. A lot of security professionals and enterprises are asking what is threat intelligence, do I need it, and can it improve my security?  First let’s start by defining threat intelligence and the rest of this guide will provide a practical use case for threat intelligence. Threat intelligence is utilizing information to detect security threats that traditional methods and technologies may not and providing decision driven incident response based off data.

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Intro to the ELK Stack on CentOS 7

This is a two part series on setting up an ELK stack to receive syslog and in the next post Bro logs. The ELK stack is an awesome collection of software but a complicated MumboJumboCombo of components. I wanted to help break that barrier for beginners and to help explain how each component works. So stick with me on this two part series! I would like to give credit to this DigitalOcean post writer for the ELK stack write-up which I’ll be referencing. Additionally my Github contains a script to setup the ELK stack for CentOS 7 64-bit based on the guide below.

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Part 1: Install/Setup Wazuh with ELK Stack

If you have been following my blog you know that I am trying to increase my Incident Response(IR) skillz and experience. For a class project we had to create/improve a piece of software in the forensic community for Windows(Windows forensic class). From my short time of searching the internet I never found a guide to setting up a logging system for Windows from start to finsh. An effective logging system has an agent/collector, a log aggregator, a data visualizer, and a good alerting mechnism.

 

The following sytem I have setup has Wazuh(OSSEC fork) for log collection, Wazuh Management for a log aggregator, the ELK stack for data retention and vizualiztion, and elastalert for e-mail alerting. In this guide I will walk you through on how to setup an effective logging system for all operating systems but mainly Windows for free. Additionally, we will be discussing the type of things that should be logged depending on your enviornment. As final note I have included my github repo at the bottom if you want to automated scripts for all of this.
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Part 1: Google GRR Incident Response Tool

 

GRR Rapid Response is an incident response framework focused on remote live forensics. It based on client server architecture, so there’s an agent which is installed on target systems and a Python server infrastructure that can manage and communicate with the agents.

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