ctf-writeups

Nullcon Berlin HackIM 2025 CTF

Link: https://ctf.nullcon.net/

CTFTime: https://ctftime.org/event/2874

Result: 2599 Points, 34th Place

Solved Challenges:

Misc:

• Null Sanity
• usbstorage

Web:

• grandmas_notes
• pwgen
• webby

Crypto:

• Power tower
• Simple ECDSA
• decryption execution service
• Field trip
• Magnetic tape
• Narrow DES

Reverse:

• hidden_strings

Pwn:

• Fortispy 1 solved by @Rosayxy

Solved after the competitions:

• All Fortispy pwn challenges solved by @Rosayxy