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  • Namespace: picoctf/18739f24
  • ID: Timer
  • Type: custom
  • Category: Forensics
  • Points: 1
  • Templatable: no
  • MaxUsers: 0

Description

You are trying to find a secret code being transmitted across a network. You were able to gain access to the network and pick up some traffic that was being sent across it. Find the flag hidden in the capture.

Download the flag {{url_for("traffic.pcap", "here")}}.

Details

Hints

  • Download the file and open it in wireshark or scapy to examine it
  • Look at all the different fields of the packets
  • The data and headers aren't the only information in the packet...
  • Long is 1, short is 0

Solution Overview

Download traffic.pcap, open it in Wireshark or scapy, and try to find the hidden flag.

Challenge Options

cpus: 0.5
memory: 128m
pidslimit: 20
ulimits:
  - nofile=128:128
diskquota: 64m
init: true

Learning Objective

Learn to look through wireshark traces and find necessary information.

Attributes

  • author: Devan Grover
  • organization: CMU
  • event: 18749 CTF