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Alex Ionescu Profile
Alex Ionescu

@aionescu

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Chief Technical Innovation Officer @crowdstrike. Windows Internals author and trainer. He/Him. RTs are not endorsements, opinions are my own.

Montréal, Québec
Joined April 2008
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@aionescu
Alex Ionescu
23 days
RT @dwizzzleMSFT: My new blog covering user-mode EDR/AV platform and changes to Windows (including the death of the BSoD!!) . https://t.co/….
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Alex Ionescu
3 months
RT @wmessmer: If you update WinDbg today (1.2504.15001.0), you might notice another icon in the View tab of the ribbon, one called "Paralle….
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Alex Ionescu
3 months
RT @reconmtl: Recon CFP ends in less than 2 weeks on April 28. Prices for the training and conference increase on May 1st. Register now to….
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Alex Ionescu
3 months
RT @BlueHatIL: Vulnerability Researcher @yarden_shafir takes the BlueHatIL stage to explore surprising ways kernel pointers can still be ac….
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Alex Ionescu
4 months
RT @standa_t: The new blog post on supervisor shadow stack restrictions / supervisor shadow-stack control.
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@aionescu
Alex Ionescu
4 months
RT @slowerzs: Think HVCI and kCET mean the end of kernel code execution? I wrote a blogpost exploring an alternative way to execute a kerne….
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Alex Ionescu
4 months
RT @yarden_shafir: I’m not saying you definitely have to go to @BlueHatIL this year, I’m just letting you know it’s free, by the beach and….
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Alex Ionescu
5 months
RT @jsecurity101: Day 1 of Windows OS Internals for Security Professionals ✅ with @yarden_shafir and @33y0re. Tremendous course. Been wan….
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Alex Ionescu
5 months
RT @reconmtl: Come learn Windows Internal with @yarden_shafir at Recon Montreal on June 23-26 #reverseengineering #cybersecurity https://t.….
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@aionescu
Alex Ionescu
5 months
RT @yarden_shafir: 🎉🎉
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@aionescu
Alex Ionescu
5 months
RT @33y0re: Today I’m sharing a blog post on the implementation of kernel mode shadow stacks on Windows! This post covers actively debuggin….
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Alex Ionescu
6 months
RT @jsecurity101: I am happy to announce JonMon2.0 has been published. 2.0 offers a lot of feature updates, as well as stability. More fe….
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Alex Ionescu
6 months
RT @x86matthew: I created a hypervisor-based emulator for Windows x64 binaries. This project uses Windows Hypervisor Platform to build a vi….
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Alex Ionescu
6 months
RT @yarden_shafir: Today Microsoft fixed 6 kernel address leaks that I reported. CVE-2025-21316.CVE-2025-21317.CVE-2025-21318.CVE-2025-2131….
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Alex Ionescu
6 months
RT @vxunderground: 2025 is not cool and is not badass. Staff member b0t is evacuating from his home in California due to wildfires. On the….
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@aionescu
Alex Ionescu
9 months
It’s wonderful to see what @XenoKovah and his collaborators have built for the community. I always recommend OST2 for my new hires and other juniors, or just anyone trying to get started on a new topic. The courses are excellent. It’s an honor to sponsor the Windows Security Path
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@OpenSecTraining
OpenSecurityTraining2
9 months
Thanks to Winsider Seminars & Solutions (@yarden_shafir & @aionescu) for Sponsoring #OST2 at the Gold🥇 level!. Learn more about them here:
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@aionescu
Alex Ionescu
9 months
RT @vigilant_labs: We are excited to welcome Yarden Shafir (@yarden_shafir ) to the team!!!.
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@aionescu
Alex Ionescu
9 months
RT @aall86: VTL 2, finally publicly announced!.
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@aionescu
Alex Ionescu
10 months
RT @yarden_shafir: There’s a brand new conference which means you get another chance to take my Windows Internals class, this time in the U….
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@aionescu
Alex Ionescu
11 months
Wanted to share a technical blog post that I coauthored on some of the architectural decisions that I helped drive during my time as Chief Architect @CrowdStrike all those years ago. Thank you to the team and @dwizzzleMSFT for the partnership.
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