CTF Tools & Tips

Open-Source Intelligence

Host, DNS, IP information https://www.robtex.com/

Google Dork https://hackr.io/blog/google-dorks-cheat-sheet

Number & Text Conversion

https://gchq.github.io/CyberChef/

Password Cracking

Hash Cracker https://crackstation.net/

Hashcat https://hashcat.net/wiki/doku.php?id=hashcat

John the Ripper https://www.kali.org/tools/john/

Rockyou.txt WordList https://www.kali.org/tools/wordlists/

Cryptography

RSA Calculator http://nmichaels.org/rsa.py

XOR Calculator https://xor.pw/

Decoder https://www.dcode.fr/

Online Text Converter https://www.asciitohex.com/

Image / Steganography

Image searching https://yandex.com/

Image Layer analysis & Cheatsheet https://www.aperisolve.com/

Online Photo Editor https://www.aperisolve.com/

Web

/robots.txt

Enumeration

Ghidra reverse engineering tool https://ghidra-sre.org/

GDB Memory debugging tool https://www.kali.org/tools/gdb-peda/

Pwntools http://docs.pwntools.com/en/stable/