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Scaling Network
Incident Response
Md Nahidul kibria
Co-Founder, Beetles
The cyber threats are evolving
Mirai: An IoT DDoS Botnet
Researcher analysis indicated as few as 100,000 Mirai IoT botnet nodes were enlisted in the incident and
reported attack rates up to 1.2 Tbps.
Ransomware and spears
Incident Response
Incident Response
Proactive security
Host based and Network based detection
Complement Each Other
Artifacts
PCAPs: traffic capture, packet capture
NetFlow : Information (metadata) about packets
Logs: Events about host or network
Typical packet capture and analysis.
tshark -r nssal-capture-1.pcap -T fields -e ip.src -e
dns.qry.name -R "dns.flags.response eq 0 and dns.qry.name
contains google.com"
137.30.123.78 google.com
137.30.123.78 www.google.com
More challenges
● Rules: assets or liability
● Need to process data with threat intelligence
● Real time alert
machine learning
Tons of data from different source
Distributed File System
Service bus/distributed streaming platform.
Stream processing
Managing dataflow
Reliable distributed coordination
Modern Security operation center
Happy Hunting!
@nahidupa

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Scaling Network Incident Response

Editor's Notes

  1. The threat is change is change over time, Cybercriminals Hacktivists Nation state Insiders
  2. Incident response is an organized approach to addressing and managing the aftermath of a security breach or cyberattack, also known as an IT incident, computer incident, or security incident. The goal is to handle the situation in a way that limits damage and reduces recovery time and costs.
  3. If kernel level rootkit install host based detection may not work Not every single details can be derived from network based detection
  4. nfdump -R /var/log/netflow -q -O tstart -b -c 10 -o 'fmt:%ts %sap %dap %byt %flg' 'ip 192.168.11.104 and ip 192.168.11.101 and flags SA' | cut -c 12- | awk 'BEGIN{ printf "%12s %22s %18s %11s %5s\n", "Start time", "Source", "Dest", "Bytes", "flags"};{print};' Start time Source Dest Bytes flags 16:03:41.759 192.168.11.101:135 192.168.11.104:49297 72 .A..SF 16:03:41.813 192.168.11.101:139 192.168.11.104:49301 52 .A..SF
  5. http://www.metistream.com/comparing-hadoop-mapreduce-spark-flink-storm/