All Writeups

Comprehensive collection of CTF challenges, solutions, and insights.

2026-03-01 Network Insane

DEADROP Network 6 - OPERATION NIGHTJAR

A single PCAP containing a complete attack kill chain, reconnaissance, exploitation, C2 establishment, lateral movement, data staging, and exfiltration. Each stage requires a different analysis technique. Read the whole story from first SYN to final exfil packet.

network pcap kill-chain wireshark

2026-03-01 Network Hard

DEADROP Network 5 - C2 Beacon

A PCAP containing C2 beacon traffic with a polyglot payload hiding a second flag. Identify the beaconing pattern, extract and decode the C2 communications, then analyse the payload for the embedded flag.

network pcap c2 beaconing

2026-03-01 Network Hard

DEADROP Network 4 - ICMP Exfil

A PCAP containing ICMP echo requests with flag data hidden in the payload fields. Use Scapy or tshark to extract and reassemble the payload bytes across the packet sequence.

network pcap icmp exfiltration

2026-03-01 Network Medium

DEADROP Network 2 - DEADROP C2

A PCAP containing DNS exfiltration traffic where the flag is split across hex-encoded subdomain labels in a series of TXT queries. Extract and reassemble the labels in sequence to reconstruct and decode the flag.

network pcap dns exfiltration