From OSCP to OSEP: Does it Fill the Red Team Gap?

The honest gap between OSCP and OSEP from someone who passed OSCP in 2017 and OSEP while actively working as a red teamer. What enterprise environments actually demand and why evasion changes everything.

June 13, 2025 · z-r0crypt

SSSD-Extract: Dumping AD Hashes and Domain Info from Linux Systems

Extract cached AD hashes and enumerate domain groups, users and machine accounts from SSSD on domain-joined Linux. Extended fork of ricardojoserf/SSSD-creds with domain enumeration added during OSEP exam preparation.

August 20, 2023 · z-r0crypt

HTB Machines for OSEP/PEN-300 Preparation: Complete Attack Chain Mapping

HTB machines mapped to every PEN-300 syllabus topic. From Office macros to Kerberos delegation — covers client-side execution, AV evasion, AD exploitation, MSSQL, lateral movement and more.

April 27, 2023 · z-r0crypt

Dangerous PHP Functions: Code Execution and Exploitation Reference

PHP dangerous function reference for source code review and exploitation. Covers command execution, code evaluation, callbacks, filesystem, and information disclosure — with grep/semgrep patterns and PHP version compatibility notes.

January 25, 2021 · z-r0crypt

Cryptography I: Advanced Block Cipher Modes and Padding

Practical implementation of CBC and CTR modes: IV management, nonce-based encryption, padding schemes (TLS), and security bounds.

February 5, 2020 · z-r0crypt

Cryptography I: Block Ciphers and Modes of Operation

Week 2-3: Block ciphers, PRP security, one-time key modes (ECB/DET-CTR), many-time key modes (CBC/CTR), IV/nonce-based encryption.

February 3, 2020 · z-r0crypt

OSWE/AWAE Preparation: Complete Study Guide

Complete OSWE/AWAE preparation guide from someone who passed in 2020. Curated resources by vulnerability class, exam strategy, and what actually matters.

January 22, 2020 · z-r0crypt

Microcorruption CTF Tutorial: Embedded Security Reverse Engineering

Tutorial-level walkthrough of Microcorruption CTF on MSP430 microcontroller with debugger techniques and vulnerability identification.

November 25, 2019 · z-r0crypt

Cryptography I: Stream Ciphers, PRGs, and Semantic Security

Week 1 foundations: stream ciphers, PRG security definitions, birthday paradox, attacks on OTP/RC4/CSS, and Salsa20 construction.

November 24, 2019 · z-r0crypt