Elastic cluster for DFIR

See https://www.vanimpe.eu/2020/10/24/analyse-linux-syslog-auditd-logs-with-elastic/

Make sure you have Docker and Docker-compose installed.

sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
sudo apt update
apt-cache policy docker-ce
sudo apt install docker-ce
sudo usermod -aG docker ${USER}
sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose 

Initiliaze via init-elastic-dfir.sh

Start containers via start-elastic-dfir.sh

Elastic requires that you have set vm.max_map_count sufficiently high. Check /etc/sysctl.conf. A good value is 262144

Change the config in filebeat/filebeat.docker.yml

Start the filebeat docker as in filebeat-dfir.txt

Do not forget to import the dashboards and vizualisations.

packetbeat setup -e -E output.logstash.enabled=false -E output.elasticsearch.hosts=['ELK:9200'] -E output.elasticsearch.username=packetbeat_internal -E output.elasticsearch.password=YOUR_PASSWORD -E setup.kibana.host=ELK:5601

filebeat setup -e -E output.logstash.enabled=false -E output.elasticsearch.hosts=['ELK:9200'] -E output.elasticsearch.username=filebeat_internal -E output.elasticsearch.password=YOUR_PASSWORD -E setup.kibana.host=ELK:5601

docker-compose logs --tail=0 --follow

The docker-compose.yml-with-nginx_cacti contains the settings to run NGINX as a reverse proxy in front of Elastic. The reverse proxy runs on port 8443 and uses locally (outside Docker) installed certificates from Let's Encrypt. The reverse proxy maps Elastic and Cacti to two Docker containers.

In the NGINX configuration, change the hostname, certificate information file and the htpassword file.