---
id: 4514
title: "Slaying Dragons with QBDI"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/slaying-dragons-with-qbdi.html"
published_at: "2018-01-24T23:00:00Z"
tags: ["ctf", "reverse-engineering", "tooling", "instrumentation", "frida", "qbdi"]
phying_url: "https://phying.com/item/4514"
lang: en
---

# Slaying Dragons with QBDI

## Summary

Solving the CSAW CTF 2015 'Wyvern 500' crackme with QBDI and its Frida bindings: tracing basic blocks to locate the password check and inject valid inputs without a full reverse engineering effort.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2018-01-24T23:00:00Z
- **Original:** https://blog.quarkslab.com/slaying-dragons-with-qbdi.html
- **Phying News:** https://phying.com/item/4514