Capture The Flag

Types of Problems

• Look at the source code for a webpage for a hidden message.
• Look at a hex dump of a file (docx, pdf, jpeg, etc.) to look for a hidden message.
• Download and run a program to get an answer.
• Connect to a server to get an answer.
• Whois lookup.
• Network scan (ping or similar).
• Information about the system they are running on (whether it's hidden or not).
• Anything that can be done with the CyberChef

Tools and Help

• CyberChef
• Linux Terminal
• telnet, ssh, ftp, sftp
• Webpage - right-click, inspect element.