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Alex Ionescu

@ionescu.bsky.social
6.7K followers 186 following 20 posts

Windows Internals Author, Developer, Reverse Engineer, Security Researcher, Speaker, Trainer, and most recently Nation State Hacker. Core OS Platform Developer at Apple, Hyper-V Vendor at Microsoft, Chief Architect at CrowdStrike and now Director at CSE.

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Reposted by Alex Ionescu
Dmitri Alperovitch @dmitri.silverado.org · 29/01/2025
Why North Korea Is Planning a Second Korean War and How to Stop It My deep-dive with @andreilankov and @DrRadchenko into North Korean regime, foreign policy, daily life, surveillance state, hackers and much more! youtu.be/hqTbLkdysBo
youtu.be
Why North Korea Is Planning a Second Korean War and How to Stop It
YouTube video by Dmitri Alperovitch
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Reposted by Alex Ionescu
The Official Pulpit of CULT OF THE DEAD COW @cultdeadcow.com · 06/01/2025
www.gofundme.com/f/support-ma... CJ is an old friend and a longtime cDc NSF member. He suffered a fall and broke his neck -- his insurance refused to pay for an MRI, which led to the break going undiagnosed for a couple of weeks, until his vertebrae had degraded to the point of quadriplegia.
gofundme.com
Donate to Support Marc Rogers' Road to Recovery, organized by Katie Vogel
cjunkie (Marc Rogers) is an invaluable and beloved member of our hacker community: a… Katie Vogel needs your support for Support Marc Rogers' Road to Recovery
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Reposted by Alex Ionescu
Dmitri Alperovitch @dmitri.silverado.org · 03/01/2025
The One Factor That Could Crash the Russian Economy A new Geopolitics Decanted episode with a deep-dive into the Russian economy and how it's faring in 2025 and what leverage Ukraine might get to negotiate an acceptable peace deal with Putin www.youtube.com/watch?v=VOYl...
youtube.com
The One Factor That Could Crash the Russian Economy
YouTube video by Dmitri Alperovitch
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Reposted by Alex Ionescu
Taggart @taggart-tech.com · 17/12/2024
This was a phenomenal breakdown of some novel Linux malware techniques. www.elastic.co/secur...
elastic.co
Declawing PUMAKIT — Elastic Security Labs
PUMAKIT is a sophisticated loadable kernel module (LKM) rootkit that employs advanced stealth mechanisms to hide its presence and maintain communication with command-and-control servers.
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Reposted by Alex Ionescu
Catalin Cimpanu @campuscodi.risky.biz · 08/12/2024
Positive Technologies has developed a new attack that exploits the SD Express standard to gain access to a device's memory through its SD card reader The DaMAgeCard attack exploits the fact that the new SD Express standard can operate in both SDIO and NVMe swarm.ptsecurity.com/new-dog-old-...
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Reposted by Alex Ionescu
OpenSecurityTraining2 @opensectraining.bsky.social · 06/12/2024
ost2.fyi/Sponsorship.... Gold Sponsors & Windows Security Track sponsor Winsider Seminars & Solutions (@yardenshafir.bsky.social & @ionescu.bsky.social) 👇
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Reposted by Alex Ionescu
Scott Hanselman 🌮 @scott.hanselman.com · 25/11/2024
Long time coming and a cast of hundreds (and a very deep tech stack) but CONGRATS to the team - it's the FIRST ARM64 for Windows build of Git!
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Mark Hamill @markhamillofficial.bsky.social · 22/11/2024
There is glory in the unexpressed thought.
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Dave Aitel @daveaitel.bsky.social · 23/11/2024
www.whitehouse.gov/briefing-roo...
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Alex Ionescu @ionescu.bsky.social · 19/11/2024
I have a legitimate question — given the incredible progress made by Windows on ARM64, it baffles the mind that this is running on an Intel SoC. Especially if it’s meant to be cheap and sustainable. Seriously — why?
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Alex Ionescu @ionescu.bsky.social · 15/11/2024
As far as intelligence scandals come, and what’s coming… I’d take this scandal over any other, any time.
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Reposted by Alex Ionescu
Richard Johnson @richinseattle.bsky.social · 10/11/2024
This awesome fuzzing blog post by @r00tkitsmm.bsky.social covers a super reliable macOS kernel binary rewriting to instrument any KEXT or XNU at BB or edge level. Mandatory reading for anyone interested in fuzzing whether you use MacOS or not. So many good system internals and fuzzing references!
r00tkitsmm.github.io
Pishi: Coverage guided macOS KEXT fuzzing.
This blog post is the result of some weekend research, where I delved into Pishi, a static macOS kernel binary rewriting tool. During the weekdays, I focus on Linux kernel security at my job and would...
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Alex Ionescu @ionescu.bsky.social · 08/11/2024
Very excited to finally see this live! An incredible shift in cloud computing.
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Reposted by Alex Ionescu
P(aul) Frazee @pfrazee.com · 15/05/2023
alright folks, the app code is now public github.com/bluesky-social/social-app
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Alex Ionescu @ionescu.bsky.social · 08/05/2023
So first MSI has been found to ship their Secure Boot policy in “AlwaysExecute” mode on 300+ motherboards, and now they had their BootGuard private key leaked from their source repo (WHY is in their repo? 🤦🏻‍♂️🤦🏻‍♂️🤦🏻‍♂️). Between this and the DBX running out of space, UEFI firmware security needs a reboot.
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Alex Ionescu @ionescu.bsky.social · 04/05/2023
Windows now has VBS/TPM protected token binding and you can finally now store private keys in hardware and make them truly non-exportable even by a privileged kernel attacker. Great stuff from Dwizzzle: gist.github.com/dwizzzle/a1c4cf4b66…
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Reposted by Alex Ionescu
The Washington Post @washingtonpost.com · 03/05/2023
@ washingtonpost dot com you read that right
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Marc Rogers @cjunky.bsky.social · 03/05/2023
Probably one of the best pieces of reporting on the Solarwinds supply-chain attack. Excellent piece by Kim Zetter. Highly recommended reading.
www-wired-com.cdn.ampproject.org
SolarWinds: The Untold Story of the Boldest Supply-Chain Hack | WIRED
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Alex Ionescu @ionescu.bsky.social · 02/05/2023
Binge-watched BEEF last night on Netflix and everything from the soundtrack to the experience of being a first generation millennial immigrant from a similar cultural background was cathartic. I cried for hours. I can only imagine how much more this speaks to Asian Americans/Canadians.
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Rose 🌹 @rose.bsky.team · 01/05/2023
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Rachel Tobac @racheltobac.bsky.social · 01/05/2023
I just followed so many people from this list. Thank you @ichthyos.com!
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Alex Ionescu @ionescu.bsky.social · 01/05/2023
I feel like I’m back on IRC but with a Twitter UI front end 🥰
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Alex Ionescu @ionescu.bsky.social · 30/04/2023
Excited to be on a healthy new platform and share anything from InfoSec knowledge to OS Internals tidbits to startup/VC war stories and more!
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