Challenge Overview

A recent investigation uncovered suspicious activity on a corporate network. Analysts suspect sensitive files were exfiltrated using simple but overlooked techniques. You have been provided with a packet capture (doc_exfil.pcap) that may contain evidence of the attacker's actions. Can you trace their activity and uncover what they tried to hide? In this CTF challenge, your objective is to analyze the HTTP traffic, extract the transferred files, and investigate them carefully to locate the hidden flag.

What You Will Learn

  • Analyze HTTP network traffic in Wireshark to identify unusual communication patterns and suspicious activity.
  • Identify the domain contacted by the attacker by examining packet and HTTP request details.
  • Use Wireshark Export Objects to identify and extract files transferred through the network.
  • Investigate extracted PDF files to determine which artifact contains the hidden flag.
  • Analyze suspicious file contents and retrieve the embedded flag from the recovered artifact.

Program Curriculum

Join over 1 Million professionals from the most renowned Companies in the world!

certificate

Choose the Pro Plan That Fits Your Learning Journey

Invest in your future with flexible Pro subscription plans. Whether you're starting your cybersecurity journey or expanding your expertise, choose the membership duration that works for you and gain access to our complete learning platform.

Monthly Plans
Annual Plans
Save 20% with our annual plans!

Pro

Ideal for continuous learning, offering extensive resources with 900+ courses and diverse Learning Paths to enhance your skills.

$ 599.00
Billed annually or $69.00 billed monthly

What is included

  • Access to 900+ Premium Short Courses
  • 70+ Structured Learning Paths
  • Validation of Completion with All Courses and Learning Paths
  • New Courses Added Every Month
Early Access Offer

Pro +

Experience immersive learning with Practice Labs and CTF Challenges for comprehensive skill-building.

$ 699.00
Billed annually or $79.00 billed monthly

Everything in Pro and

  • 500+ Practice Labs with Guided Instructions
  • 400+ CTF Challenges with Detailed Walkthroughs
  • New Practice Labs and Challenges Added Every Month

Related CTF Challenges

1 of 49