GeeTest/DataDome Slide Captcha Solver

Introduction

• Solves all types of puzzle piece captchas
• Created as a proof of concept to show how front-end captchas are vulnerable to AI solving
• Also wanted to build an add-on to my previously published project which bypasses DataDome's detection almost every time

Methodology

Captcha Creation

• Manually labeling hundreds of thousands of images would be infeasible which requires us to create our own versions of their captchas
• GeeTest uses a pool of cutouts and base images to create captchas, places them within a frame randomly and fades the cutout
• DataDome does not have a demo site, only pops up on a protected site or have a bad cookie or send an invalid POST request, uses random images with same cutout

AI/ML Solving

• Originally started with TensorFlow but switched to YOLOv11
• Used YOLOv11n.pt with 7 epochs of training since it instantly plateaued, all args are here
• Honestly, if you're looking for a ready-made solution instead of training your own model, an API like CapSolver can handle GeeTest pretty well

Usage

Training (Optional as I Added the Weights Here)

• Generate captchas with generatecaptchas.py using images in the assets folder
• Create the dataset using this script
• If you've never used YOLO before here's their setup page which goes over training

Selenium

• I created a template/POC you can use for solving in browser with the GeeTest demo page.
• You will need to change some of the captcha identifiers depending on the site