CTF TOPIC · 6 FLAGS · 15 MIN

CTF essentials

Find evidence, recognise a flag, search instead of scroll, and keep notes.

A capture-the-flag challenge hides a specific answer in an artifact or a small system. Here, flags use flag{...}. Read the brief, inspect the evidence, form a hypothesis, and test it. Distinguish relevant evidence from decoys, search large files instead of scrolling, and write down what you have tried. Real competitions define their own permitted targets and rules; these exercises use only the supplied training artifacts.

A first example

Workflow: inspect -> identify a clue -> test a hypothesis -> submit -> record what worked.

The challenges

• Read before you run · Easy · 20 XP
• Follow the successful request · Easy · 20 XP
• A file out of sight · Easy · 20 XP
• Decoys everywhere · Easy · 20 XP
• Pieces of a flag · Easy · 20 XP
• Search, don't scroll · Easy · 20 XP