Press enter or click to view image in full size
Hi Vipul from The Hacker’s Log here 👋
Today we’re diving into one of the most powerful bug bounty techniques that still works beautifully in 2025 — Subdomain Takeover.
This guide is written in a simple, friendly, human tone so beginners can understand it, but deep enough for professionals who want high-impact findings.
Let’s break down the techniques, automation workflow, tools, and how modern takeover attacks actually happen in the cloud world.
⚡ Grab your hoodie, open your terminal, and let’s start hacking.
🧠 What Actually Is a Subdomain Takeover?
A Subdomain Takeover occurs when:
A subdomain points to a cloud provider resource that has been deleted or is no longer active — but the DNS record is still alive.
That leftover DNS mapping becomes a door waiting for attackers to unlock.
Simple Breakdown
dev.company.com -> cname -> example-app.vercel.appVercel resource deleted ❌
Attacker registers example-app.vercel.app ✨
Attacker controls dev.company.com 😈