ZygoSec
@ZygoSec
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Education platform for acquiring skills in modern vulnerability research & software exploitation
London, England
Joined May 2017
RT @bellis1000: Out-of-bounds swap on iOS heap when decoding a malicious audio stream (CVE-2025-31200) https://t.co….
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RT @bellis1000: Today I wanted to share a recent project of mine - a tool for visually representing & tracking memory, for iOS security res….
bellis1000.medium.com
Happy New Year!🥳
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RT @bellis1000: Just published a tool I wrote a couple months back to pull C++ object names from kernel memory. Bit hacky, but works & is u….
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RT @bellis1000: Just published a new blog post - Exploring the ASLR implementation in the iOS kernel
bellis1000.medium.com
In this blog post I wanted to take a look at ASLR and how the iOS kernel implements it for user-space processes.
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RT @bellis1000: Just published a blog post talking about some iOS kernel framebuffer research I’ve been looking at over the last couple wee….
link.medium.com
It’s been over two years since I last published a blog, so I thought I’d give this another go in 2020 and kick it off by writing about an…
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RT @Fox0x01: Billy Ellis (@bellis1000) giving a guest lecture at my ARM Exploit Development training. 👏🏼. Day 3 almost over. Students are h….
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RT @trendquest: Interesting lecture of @bellis1000 of @ZygoSec on #ARMv8 and mobile chip tech at two days conference @codetalkshh in Hambur….
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RT @Fox0x01: If you want to learn about ARM exploitation, you should definitely watch this excellent talk from @bellis1000! It is extraordi….
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RT @bellis1000: Out of curiosity for how debuggers work, I began writing my own bare-bones ARM&ARM64 debugger for iOS. At the moment it has….
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RT @bellis1000: Live kernel debugging on a virtualised iOS 12.0! Having the ability to do this sort of thing with whichever iPhone/version….
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iOS 11.2 KASLR defeat using thread_get_state() kernel info leak vulnerability
github.com
CVE-2018-4185: iOS 11.2-11.2.6 kernel pointer disclosure introduced by Apple's Meltdown mitigation. - bazad/x18-leak
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RT @bellis1000: Haven't done one of these in a while, but today I created this short written tutorial on 'Reversing ARM Binaries' for begin….
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We are working on redesigning our website with a more clean & simplistic feel
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Want to expand you knowledge in modern binary exploitation? Try cracking ROPLevel6 and learn about stack pivots when using ROP!
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RT @bellis1000: ROPLevel6 for ARM is now available on As my previous tweet mentions, to complete this level you mus….
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