The Art of Packet Analysis
Packets don’t lie. When an intrusion occurs, the network traffic leaves a trace. Wireshark is the de facto tool for analyzing these traces.
Key Indicators of Compromise (IoCs)
What are we looking for?
- Unusual Ports: High-number ports communicating with external IPs.
- Beaconing: Regular, heartbeat-like connections indicating C2 communication.
- Data Exfiltration: Large outbound transfers at odd hours.
Analyzing a Sample Attack
We will walk through a PCAP file containing a real-world malware infection trail.
Step 1: Filtering Noise
!(arp or dns or icmp)
Step 2: Following Streams
Reconstructing the TCP stream to see exactly what data was transferred.
Conclusion
Network analysis is a critical skill for Blue Teamers. Wireshark gives you the visibility needed to defend your perimeter.