Null Siryn (@nullsiryn)

Bits Krieg CTF: Cider Vault Solution & Linux Heap Exploitation Guide

Learn to exploit the Cider Vault CTF using Use-After-Free, Tcache Poisoning, and FSOP. A class in Linux heap exploitation with full Python code.

11 min readctfs.hashnode.dev

Feb 22

Solving LACTF Lazy Bigrams: Phonetic Bigram Substitution Challenge

Learn how to solve the LACTF Bigram Substitution challenge. This walkthrough covers phonetic mapping vulnerabilities and a Python script to recover the flag

3 min readctfs.hashnode.dev

Feb 8

Solve LACTF Tic-Tac-No Challenge: OOB Write Exploit Guide

Beat the unbeatable Minimax AI in this LA CTF walkthrough. Learn to exploit an Out-of-Bounds write in C memory to manipulate game logic and capture the flag

3 min readctfs.hashnode.dev

Feb 8

Custom Packaging CTF Writeup: Decrypting the Custom KCF Container

Learn how to decrypt the Krampus Syndicate KCF container in this Forensics CTF walkthrough. Master RC4 decryption, SHA256 key derivation, and FAT parsing.

8 min readctfs.hashnode.dev

Jan 1

Trust Issues CTF Writeup: AWS IAM Privilege Escalation

Learn to exploit AWS IAM trust misconfigurations in this CTF walkthrough. Step-by-step guide on privilege escalation, sts:AssumeRole, and S3 data exfiltrati

3 min readctfs.hashnode.dev

Jan 1

Null Siryn

About

Available for

Null Siryn's blogs

Bits Krieg CTF: Cider Vault Solution & Linux Heap Exploitation Guide

Solving LACTF Lazy Bigrams: Phonetic Bigram Substitution Challenge

Solve LACTF Tic-Tac-No Challenge: OOB Write Exploit Guide

Custom Packaging CTF Writeup: Decrypting the Custom KCF Container

Trust Issues CTF Writeup: AWS IAM Privilege Escalation

Null Siryn

About

Available for

Null Siryn's blogs

Bits Krieg CTF: Cider Vault Solution & Linux Heap Exploitation Guide

Solving LACTF Lazy Bigrams: Phonetic Bigram Substitution Challenge

Solve LACTF Tic-Tac-No Challenge: OOB Write Exploit Guide

Custom Packaging CTF Writeup: Decrypting the Custom KCF Container

Trust Issues CTF Writeup: AWS IAM Privilege Escalation

Null Siryn

About

Available for

Null Siryn's blogs

Bits Krieg CTF: Cider Vault Solution & Linux Heap Exploitation Guide

Solving LACTF Lazy Bigrams: Phonetic Bigram Substitution Challenge

Solve LACTF Tic-Tac-No Challenge: OOB Write Exploit Guide

Custom Packaging CTF Writeup: Decrypting the Custom KCF Container

Trust Issues CTF Writeup: AWS IAM Privilege Escalation

Search Hashnode

Null Siryn

About

Available for

Null Siryn's blogs

Bits Krieg CTF: Cider Vault Solution & Linux Heap Exploitation Guide

Solving LACTF Lazy Bigrams: Phonetic Bigram Substitution Challenge

Solve LACTF Tic-Tac-No Challenge: OOB Write Exploit Guide

Custom Packaging CTF Writeup: Decrypting the Custom KCF Container

Trust Issues CTF Writeup: AWS IAM Privilege Escalation