Other nomination

Stiltwalker, exploits weaknesses in the audio version of reCAPTCHA

Stiltwalker defeats audio CAPTCHAs with machine learning: an amplitude splitter cuts a challenge into single utterances, then a neural network plus MD5 and pHash lookup tables solve them. Successive rounds scored 99.1% and 60.95% against reCAPTCHA, and later versions reached 56-99% against Nucaptcha, PayPal, SecurImage, Slashdot and Davids Summer Communication.

Record

Published by

dc949.org

In the archive

• Nominated for the 2012 Top 10 Web Hacking Techniques

Related sources

• Round-two slides
• Round-two demos and audio
• Round-one slides
• Round-one slides and audio

Tags

• auth-bypass
• tooling
• filter-bypass
• case-study
• owasp-a01-2021
• owasp-a05-2021

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