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PNG files are highly regarded in CTF challenges for their lossless compression, making them ideal for embedding hidden data. Tools like Wireshark enable the analysis of PNG files by dissecting their data within network packets, revealing embedded information or anomalies.

For checking PNG file integrity and repairing corruption, pngcheck is a crucial tool, offering command-line functionality to validate and diagnose PNG files (pngcheck). When files are beyond simple fixes, online services like OfficeRecovery's PixRecovery provide a web-based solution for repairing corrupted PNGs, aiding in the recovery of crucial data for CTF participants.

These strategies underscore the importance of a comprehensive approach in CTFs, utilizing a blend of analytical tools and repair techniques to uncover and recover hidden or lost data.

Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!

Other ways to support HackTricks:

• If you want to see your company advertised in HackTricks or download HackTricks in PDF Check the SUBSCRIPTION PLANS!
• Get the official PEASS & HackTricks swag
• Discover The PEASS Family, our collection of exclusive NFTs
• Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
• Share your hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.