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Stuart Ashenbrenner

@stuartjash.bsky.social
181 followers 38 following 8 posts

Principal macOS Security Researcher @ Huntress | 🏀 Skill Development Coach | 🖼️📖

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Reposted by Stuart Ashenbrenner
Phil Stokes ⫍🐠⫎ @philofishal.bsky.social · 07/11/2025
You know how ppl say you can't decompile run-only #AppleScript ... 😜 #macOS #security
showing comparison of source code (left) and output of AppleScript decompiler.
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Binary Ninja @binary.ninja · 07/08/2025
One of the coolest new things in Binary Ninja 5.1? Pseudo Objective‑C. Huge shoutout to Mark, who actually wrote this before joining the team (talk about an overkill job application). If you’re digging into iOS, Swift, or kernelcaches, this one’s a game‑changer.
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Kenneth Kinion @kennethkinion.bsky.social · 20/06/2025
Hot on the heels of the researched published by @huntress.com, hunting for Zoom-themed lures from DPRK's #BlueNoroff 💥Learn hunting techniques 💥Leverage new Validin features and data 💥Full, unredacted indicator list (domains, IPs, hashes) www.validin.com/blog/zooming...
validin.com
Zooming through BlueNoroff Indicators with Validin | Validin
Pivoting through recently-reported indicators to find BlueNoroff-associated domains
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alden @re.wtf · 18/06/2025
excited bc today @huntress.com is releasing our analysis of a gnarly intrusion into a web3 company by the DPRK's BlueNoroff!! 🤠 we've observed 8 new pieces of macOS malware from implants to infostealers! and they're actually good (for once)! www.huntress.com/blog/inside-...
huntress.com
Inside the BlueNoroff Web3 macOS Intrusion Analysis | Huntress
Learn how DPRK's BlueNoroff group executed a Web3 macOS intrusion. Explore the attack chain, malware, and techniques in our detailed technical report.
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Stuart Ashenbrenner @stuartjash.bsky.social · 18/06/2025
Been busy this week digging in to a BlueNoroff attack.
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Brandon Dalton @partyd0lphin.bsky.social · 09/06/2025
Sadly no new ES events for macOS 26. There are a few nice event property updates and additions to the process structure though :)
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Lindsey O’Donnell Welch @lindseyodwelch.bsky.social · 23/04/2025
Some good takeaways from @huntress.com’s recent Tradecraft Tuesday ft. Patrick Wardle: -The impact of Apple bringing TCC events to Endpoint Security -#Mac malware persistence techniques vs BTM -Security alert inundation for #macOS users Catch up here⤵️ www.huntress.com/blog/say-hel...
huntress.com
Say Hello to Mac Malware | Huntress
In this month’s Tradecraft Tuesday, we talked about how threat actors are finetuning their macOS malware in order to maintain persistent access and avoid detection by Apple’s security features.
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Binary Ninja @binary.ninja · 24/04/2025
You asked, we delivered: Binary Ninja 5.0 brings major iOS reversing upgrades! DYLD Shared Cache is now a first-class feature, with up to 18x faster performance and way smarter analysis across the board. binary.ninja/2025/04/23/5...
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alden @re.wtf · 15/04/2025
finally got around to rewriting the copy as yara binja plugin! 🥰 has a few quality of life improvements (new formats) and address wildcarding is fixed for ARM! (sorry bout that mac homies) ❤️ it's also now available in the plugin repository! 🔥 github.com/ald3ns/copy-...
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Jamie Levy 🦉 @gleeda.bsky.social · 01/04/2025
✅Are you well versed in Linux? ✅Do you understand Linux internals and eBPF? ✅ Do you like building out POCs? ✅Do you understand cyber threats and forensic artifacts? 💥Become a Principal Linux Researcher at @huntress.com Apply here: 👉 job-boards.greenhouse.io/huntress/job...
job-boards.greenhouse.io
Principal Security Researcher - Linux
Remote US
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golby @golby.bsky.social · 28/03/2025
Finally! 🥳 objective-see.org/blog/blog_0x...
objective-see.org
TCCing is Believing
Apple finally adds TCC events to Endpoint Security!
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Phil Stokes ⫍🐠⫎ @philofishal.bsky.social · 25/03/2025
s1.ai/readup 🐚 Adware loaders are always the most complex! Props to @syrion89.bsky.social for helping me pull apart all these different bins and figuring out what they had in common and how to attribute and detect them. 🦾 #adware #malware #macOS #security @sentinelone.com @sentinellabs.bsky.social
s1.ai
ReaderUpdate Reforged | Melting Pot of macOS Malware Adds Go to Crystal, Nim and Rust Variants
A widespread campaign with binaries written in different source languages, ReaderUpdate presents unique challenges for detection and analysis.
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Stuart Ashenbrenner @stuartjash.bsky.social · 21/03/2025
macOS Malware Knowledge Base: I've been putting together a KB of sorts of macOS malware research. So next time you are writing about some malware family, you can just visit here and see all technical articles written about any particular family. Still a WIP. notes.crashsecurity.io/notes/b/06C7...
notes.crashsecurity.io
Notes
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Greg Lesnewich @greg-l.bsky.social · 16/03/2025
Trying to attribute DPRK cryptoheist activity? Here’s a quick pocket attribution guide Remember to practice your DPRK ABC(TT)s
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XPN @xpnsec.com · 12/03/2025
Brilliant talk from @scott.hanselman.com on the realities on LLMs. The temperature demo is such a good way to explain the "magic" behind text generation. www.youtube.com/watch?v=kYUi...
youtube.com
Keynote: AI without the BS, for humans - Scott Hanselman - NDC London 2025
YouTube video by NDC Conferences
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Kenneth Kinion @kennethkinion.bsky.social · 11/03/2025
Found these likely #Lazarus / #TraderTraitor domains w/ #Validin getcoinprice[.]info stocksindex[.]org wfinance[.]org stockinfo[.]io Read my how-to on leveraging Validin's exceptional visibility, history, and pivoting features for C2 infrastructure forensics: www.validin.com/blog/bybit_h...
validin.com
Lazarus Group Bybit Heist: C2 forensics | Validin
An in-depth hunt for Lazarus APT group infrastructure related to the Bybit hack using Validin's host response and DNS databases.
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Rob Joyce @rgblights.bsky.social · 01/01/2025
For all my math peeps out there: 2025 is pretty amazing mathematical arrangement. 1. 2025 is a perfect square (45×45=2025) 2. 2025 is the sum of digits of cubes from 1 to 9 (1³ + 2³ + 3³ + ... + 9³ = 2025) 3. 2025 is the first square year after 1936 (Cont…)
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Stuart Ashenbrenner @stuartjash.bsky.social · 24/12/2024
Entering EOY PTO in the throes of a sleep regression is like taking a gulp of water after a run and realizing it’s tonic.
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Stuart Ashenbrenner @stuartjash.bsky.social · 18/12/2024
Our talk from @objective-see.bsky.social is now available online. Check out @re.wtf and I yap about macOS infostealers. www.youtube.com/watch?v=Hv6A...
youtube.com
#OBTS v7.0: "Stealer Crossing: New Horizons" - Alden Schmidt & Stuart Ashenbrenner
YouTube video by Objective-See Foundation
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Csaba Fitzl @theevilbit.bsky.social · 09/12/2024
📣I’m happy to announce that I’m planning to write a brand new “macOS Vulnerability Research” training. 🥳 Considering the amount of work the writing requires it will be available late 2025 or early 2026. It will be Live class only, and likely only once or twice a year.
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Raphaela Mettig @rmettig.com · 05/12/2024
I'm having #OBTS FOMO, so I decided to go ahead and make my own Apple security starter pack! I'm definitely missing folks on here, so feel free to DM me about anyone else who should be added! 🍎 go.bsky.app/gE3xQq
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Stuart Ashenbrenner @stuartjash.bsky.social · 08/12/2024
#OBTS has wrapped. Next year has so much on deck 👀 - TAOMM v2 book @patrickwardle - MacOS Threat Hunting book @jbradley89 - MacOS Vuln Training @theevilbit.bsky.social - OFTW v3 @objective_see - WeTalks v1 @x71n3 - OBTS v8 in Ibiza Awesome stuff coming from the macOS security space 🙌
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Brandon Dalton @partyd0lphin.bsky.social · 07/12/2024
Shout-out to the incredible Huntress crew for the special T-shirt 🏝️ and a killer #OBTS presentation by @stuartjash.bsky.social and @re.wtf!
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Jacob Latonis @jacoblatonis.me · 06/12/2024
Catch @greg-l.bsky.social and I talking about Mach-O binary similarity methods, YARA-X, and all the cool APT malware we pulled apart at #OBTS v7 today at 11:50am HST 🌺
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Stuart Ashenbrenner @stuartjash.bsky.social · 06/12/2024
Yesterday I got to present with the 🐐 @re.wtf. Such a blast talking thru infostealers and the telenovela that they’ve become. #OBTS really is the best, chillest conference out there. Excited for a second day of talks 🤓🍎
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XPN @xpnsec.com · 02/12/2024
Good lineup of books! www.humblebundle.com/books/hackin...
humblebundle.com
Humble Tech Book Bundle: Hacking 2024 by No Starch
Level up your hacking and skills with this tech bundle from No Starch. Learn to protect yourself and others! Pay what you want & support charity!
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Jacob Latonis @jacoblatonis.me · 06/12/2024
@re.wtf 🐐 @stuartjash.bsky.social 🐐
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Brandon Dalton @partyd0lphin.bsky.social · 05/12/2024
Extremely excited to be giving a talk titled "Mac, Wheres My Bootstrap" tomorrow at #OBTS with @theevilbit.bsky.social! Join us live on YouTube or in-person at 2:40pm HST / 7:40pm EST. We'll be dropping a tool you can walk away with :)
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Phil Stokes ⫍🐠⫎ @philofishal.bsky.social · 30/11/2024
@sentinelone.com is hiring - #macOS detection engineer. www.sentinelone.com/jobs/?gh_jid...
sentinelone.com
Careers at SentinelOne
Take a look at the open positions at SentinelOne. We're dedicated to defending enterprises across endpoints, containers, cloud workloads, and IoT devices in a single cybersecurity platform.
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Stuart Ashenbrenner @stuartjash.bsky.social · 21/11/2024
A few files in my macOS notes got updated, especially XProtect to reflect some its newer changes in macOS Sequoia. notes.crashsecurity.io/notes
notes.crashsecurity.io
Notes
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Binary Ninja @binary.ninja · 20/11/2024
Don't Panic! The answer: version 4.2 of Binary Ninja, is now available. Check out the release blog post which shows: - New PseudoC/Python/Rust decompilation - DLYD Shared Cache Support - WARP Signature System And many other impactful features. binary.ninja/2024/11/20/4.2-frogsta…
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