crwnctl

Writeups

CTF Solutions & Case Studies

Technical walkthroughs of cybersecurity challenges, featuring reconnaissance, exploitation techniques, reasoning, and lessons learned.

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picoCTF 2026 Writeups

A curated collection of detailed writeups from picoCTF 2026, with additional challenges being added over time.

2026-03-01

Bytemancy-0

Prompt asks for ASCII decimal 101 repeated side-by-side. Walkthrough covers why the check maps to 'eee' and how to solve quickly from source inspection.

picoCTFGeneral SkillsASCII

2026-03-02

Bytemancy-1

Byte-conjuring variant where user input must match \x65 repeated 1751 times. Covers translating the condition into the exact required payload.

picoCTFGeneral SkillsScripting

2026-03-05

My Git

Git-focused challenge: inspect repository contents, follow README instructions, and use basic Git/file operations to recover the flag.

picoCTFGeneral SkillsGit

2026-03-08

Printer Shares

SMB share enumeration using smbclient to locate exposed printer-share artifacts and recover the challenge file from a misconfigured network share.

picoCTFNetworkingSMBEnumeration