Privilege Escalation Engineer Principal Consultant @ Reversec (formerly WithSecure Consulting)

@bugch3ck.bsky.social
Joined August 2011
Jonas Vestberg retweeted
Finally one billionaire with some balls.
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Jonas Vestberg retweeted
True love
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Jonas Vestberg retweeted
What is OBJECT_ATTRIBUTES and how it's used? The Windows API hides it, but every native create or open call needs it. Full write-up: trainsec.net/library/windows…
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Jonas Vestberg retweeted
Pippi Långstrump ai-genererad parodi i gammal japansk samurai-filmstil. Jag har följt utvecklingen av de här ai-modellerna inom generativ bild, video, musik och ljud, hands on sedan 2022. Jag är helt blown away av det här. Vi är alltså här nu. #aivideo #svenskfilm #parodi
🤖 Made with AI
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⚒️ BTR Reforged: Weaponizing Defender's Remediation Driver as a Kernel Operation Primitive ⚠ Trusted Remediation Primitives with Undocumented Internals. 🔓 15+ years. Unchanged. Unblockable. 🤔 What if an attacker learned its language? We did. 👇 research.checkpoint.com/2026…
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Jonas Vestberg retweeted
Weaponising MDM - running a fake MDM server and pwning people as SYSTEM with two clicks (if they have permission to elevate). Poc included. blog.amberwolf.com/blog/2026…
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Jonas Vestberg retweeted
BloodHound is 10 🎉 To celebrate, creators @_wald0, @CptJesus & @harmj0y joined for a special two-part #KnowYourAdversary. They reminisce on the first attack graphs and look ahead to what’s next for BloodHound. 1️⃣: ghst.ly/4xT4WdA 2️⃣: ghst.ly/4zIIeqj
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Jonas Vestberg retweeted
😎
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Jonas Vestberg retweeted
So, you've deployed NDES on-premises to issue SCEP certificates with #Microsoft Intune. Did you know it's leaking internal domain information to the Internet? Here's how to detect and remediate this issue. rmhci.co/3TRfYkR #mobility #security #identity #pki #msintune
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Jonas Vestberg retweeted
Patch SCCM with learn.microsoft.com/en-us/in… or you're likely vulnerable to a new hierarchy takeover technique (CVE-2026-47301) discovered by Omri Baso from @XMCyber_ that worked in my lab out of the box. MS's KB description doesn't do the impact justice. medium.com/@omribaso/from-do…
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Jonas Vestberg retweeted
Hai Tung@tacbliwAug 10
Someone dropped this Windows LPE writeup online yesterday along with a PoC. But the mentioned CVE-2026-62737 is not released yet, maybe it will be in the Patch Tuesday tomorrow. And the PoC still work in the lastest version of Windows 😂 xz.aliyun.com/news/92658
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Jonas Vestberg retweeted
Our Black Hat talk on the OpenAI-Hugging Face incident is now live on youtube. This is a watershed moment for the industry. I encourage all defenders to watch, consider how attack dynamics will imminently change, and plan for accelerating defense. youtube.com/watch?v=87DyyMV0…
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Jonas Vestberg retweeted
use this one WEIRD trick to make your customers never purchase your car again
Check this out, today when you start your BMW, you see an advert for #spiderman #brandnewday
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Not sure about posting here again but I want to go back to doing what I love: making cool art for hackers and it seems like most of you stayed here. So, I still hate the guy in charge but I might post some stuff here.
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Jonas Vestberg retweeted
Happening now! @bagelbyt3s is kicking of his briefing session presenting original research into a new Attack Path technique that results in full WSUS infrastructure takeover. #BHUSA
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Anthropic
@AnthropicAIJul 30
In a review of our cybersecurity evaluations, we found three incidents in which a Claude model reached the internet from within or while interacting with a third-party evaluation environment, and then gained unauthorized access to the real systems of three different organizations. Our post describes what happened, how it happened, and what we’re changing. We encourage other AI developers to perform similar reviews. We conducted this review together with @Irregular, one of our evaluation partners, and thank them for the joint investigation and their collaboration on this post. This type of collaboration is increasingly critical to safe, rigorous evaluation of models, and we look forward to continuing to work together on security. anthropic.com/news/investiga…
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Jonas Vestberg retweeted
YSoNet v2026.7.9 is out 🎉 31 → 50 gadgets 54 → 88 variants 118 → 235 gadget/serializer combinations across 17 serializers 🆕 NEW GADGETS WORTH KNOWING ▸ DataTable + DataTableTypeSpoof Same-graph DataTable root carrier for RCE. No nested BinaryFormatter or extra binder boundary. TypeSpoof emits a real DataTable subclass, so blocking only the exact DataTable wire name may not prevent reconstruction. ▸ TypeConfuseDelegateFileOperations Five delegate-confusion variants for writing, copying, moving and truncating files. No child process, compiler or WPF required. ▸ AssemblyInstallerLoad Loads a specified DLL from a local or UNC path and instantiates [RunInstaller(true)] installer types. Supported by nine serializers. ▸ DynamicUpdateMapExtension Passes x:XData to NetDataContractSerializer without a binder, allowing a XAML-only sink to carry an NDCS gadget. 🔧 NOTABLE UPDATES ▸ TypeConfuseDelegate now supports SortedDictionary and TreeSet roots, useful for testing blocklists that match only the exact SortedSet wire name. ▸ WindowsIdentity and WindowsClaimsIdentity can carry the inner BinaryFormatter graph through actor, bootstrapContext, claims or WIF’s _actor sink. Variant numbering is now aligned across both gadgets and all serializers. 🔗 github.com/irsdl/ysonet ysonet.com | ysonet.net #AppSec #YSoNet
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Jonas Vestberg retweeted
6/..to be continued in @nicowaisman’s detailed report here: xbow.com/blog/bing-images-rc…
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Jonas Vestberg retweeted
I don't usually post about Active Directory but I'm doing this for @techspence 😂 This is officially from Microsoft. Link below 👇
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