🪦Old Hello

My name is k1nomi. This gitbook is where I post things I've learned from CTFs, in the form of writeups. I mostly do cryptography, forensics, and OSINT challenges. For international CTFs, the writeups are in English. For national CTFs, the writeups are in Indonesian.

Here's a quick link to the write-ups based on tags, to help search relevant writeups faster.

Techcomfest 2024

Title	Category	Stage	Write-Up	Notes
crackable	Cryptography	Qual	Link	MD5, hash collision
pemanasan	Forensics	Qual	Link	pdfcrack, qpdf, JSFuck
Kuli-ah forensik	Forensics	Qual	Link	johntheripper, zip crack, sstv

NCW 2023

Title	Category	Stage	Write-Up	Notes
Freminhelp	Forensics	Qual	Link	Memory Forensics, Registry, filescan

Technofair 10.0

Title	Category	Stage	Write-Up	Notes
rapsodi	Cryptography	Qual	Link	LCG, Bitwise Operation
Pengen Merch JKT	Cryptography	Qual	Link	AES-CBC, Bit Flipping, XOR
Sekte Pemuja Osha Oshi	Cryptography	Final	Link	-
Jurus Rahasia Teleport	Cryptography	Final	Link	-
file pemberian fans	Forensics	Qual	Link	docx, OLE file, macro, vba, malware
bantu aku mencari sebuah rahasia	Forensics	Final	Link	Memory Forensics, Volatility

Gemastik2023

Title	Category	Stage	Write-Up	Notes
Gen-Z	Forensics	Warm-Up	Link	zlib
easy AES	Cryptography	Qual	Link	AES-OFB, XOR
k-1	Cryptography	Qual	Link	Shamir Secret Sharing Scheme, polynomials, mod arithmetic