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Bugcrowd Student Finale CTF 2025 Writeup:  MadDog Memorial

Bugcrowd Student Finale CTF 2025 Writeup: MadDog Memorial

Here, I had to find a way to get the admin flag from a memorial website. The site assigns regular visitors random usernames, but the flag is restricted to admins only. I needed to figure out how to trick the system into believing I was the administrator.
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j3rry
Bugcrowd Student Finale CTF 2025 Writeup:  Predictable

Bugcrowd Student Finale CTF 2025 Writeup: Predictable

In this chal, I was given a compromising an admin account on a website. I had to figure out how password reset tokens were generated and create a valid one to hijack the account. The hint suggested that the tokens were generated using predictable patterns based on timestamps and email addresses.
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j3rry
CrateCTF 2025 Writeup: Fiats och Shamirs Skyltsmedja

CrateCTF 2025 Writeup: Fiats och Shamirs Skyltsmedja

In this challenge, we visited a "Sign Smith" shop that used a fancy cryptographic protocol to verify customers. Our goal was to forge a signature to prove we were allowed to pick up the flag, even though the shop refused to sign any message containing the word "flag."
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j3rry
CrateCTF 2025 Writeup: Evenemang

CrateCTF 2025 Writeup: Evenemang

The is a forensics challenge where a user accidentally ran a mal program hidden among 1000 other numbered programs (1.exe to 1000.exe) in a folder on their desktop. Instead of manually checking each program, they ran all of them and captured the system logs to analyze which one behaved suspiciously.
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j3rry
CrateCTF 2025 Writeup: Den buslätta utmaningen

CrateCTF 2025 Writeup: Den buslätta utmaningen

"Buslätt" is a OSINT challenge that is Swedish for "very easy." It gives you with a logo, a compass pointing South-West, and a text box. While the text claims "you will solve it easily". The goal is to use visual analysis of the sign's logo & the compass direction to get the true location in Sweden.
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j3rry
CrateCTF 2025 Writeup: Skicka vidare

CrateCTF 2025 Writeup: Skicka vidare

In this challenge, we were given two mysterious files and a server address. The goal was to find a flag hidden on that server. The catch? We didn't have a password, and the server was listening on a weird, non-standard port.
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j3rry
Enigma Xplore3.0 Writeup - Bored Waiting

Enigma Xplore3.0 Writeup - Bored Waiting

This is an OSINT challenge wherein we had to guess the location and time of the video provided in the challenge. The flag format: EnXP{time_location}
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j3rry
BSidesNYC CTFd Writeup - Hacky Bird

BSidesNYC CTFd Writeup - Hacky Bird

It was a web challenge where in the flag will be received when the score reaches 1 million in the flappy bird game...!!!
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j3rry
BSidesNYC CTFd Writeup - Rush

BSidesNYC CTFd Writeup - Rush

It was a misc. multi-stage CTF challenge themed around the band Rush. Each stage required a combination of decoding, thematic analysis, and logical deduction.
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j3rry
BSidesNYC CTFd Writeup - BASEic Encoding

BSidesNYC CTFd Writeup - BASEic Encoding

This document outlines the steps to solve the "BASEic Encoding" challenge, which involves decoding a string of complex Unicode characters to reveal the flag. Challenge String: ꍦ鱡𓍻普散桤鵟ꌰ橤𓅟頳桲𓄷敟鑦鵴樱靟樴𠌳
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j3rry
BSidesNYC CTFd Writeup - Secure

BSidesNYC CTFd Writeup - Secure

The objective is to find a hidden flag by exploiting a common cloud security misconfiguration: exposed credentials in publicly accessible source code. The primary tool used is the AWS Command Line Interface (CLI).
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j3rry
BSidesNYC CTFd Writeup - Secret Map: Matroyshka?

BSidesNYC CTFd Writeup - Secret Map: Matroyshka?

It was the second part of "Secret Map: Scratching the surface" forensics challenge. The same map.jpg was provided.
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j3rry
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