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jeffmcjunkin

1,289 karma · joined January 2, 2013

Information security professional living in Southern Oregon. Forensics, incident response, and networking interest me most.
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jeffmcjunkin··on MiMo v2.6
I'd read the heck out of that blogpost. You have my interest.
jeffmcjunkin··on GPT-5.6 Sol Pricing Cut by 50% on OpenRouter
Often people are counting all tokens, including cached input tokens, for those more impressive "billions of tokens" quotes.
jeffmcjunkin··on DeepSeek V4 Pro 0813
Artificial Analysis page is up: https://artificialanalysis.ai/models/deepseek-v4-pro
jeffmcjunkin··on Cybersecurity researchers aren't happy about the guardrails on Anthropic's Fable
Confirmed: https://socket.dev/blog/mini-shai-hulud-miasma-and-hades-wor...
jeffmcjunkin··on Cybersecurity looks like proof of work now
Can confirm. Matching decompilation in particular (where you match the compiler along with your guess at source, compile, then compare assembly, repeating if it doesn't match) is very token-intensive, but it's now very viable: https://news.ycombinator.com/item?id=46080498

Of course LLMs see a lot more source-assembly pairs than even skilled reverse engineers, so this makes sense. Any area where you can get unlimited training data is one we expect to see top-tier performance from LLMs.

(also, hi Thomas!)

jeffmcjunkin··on Project Glasswing: Securing critical software for the AI era
Can confirm.
jeffmcjunkin··on Kerberoasting
I absolutely agree that Microsoft could do better, but they are making progress in removing support entirely for broken (from a security perspective) older protocols such as NTLMv1 (which uses DES as well: more here -- https://bit.ly/crackingntlmv1) and SMB1.

The financial incentives drive Microsoft to support every possible (mis)configuration, forever. It's the tireless work of a few folk at Microsoft like Ned Pyle, Steve Syfus, and Mark Morowczynski that have landed the changes so far.

There could absolutely be a "security check" tool deployed by default with Server 2025 or similar that looks for Kerberoastable user accounts (any account with a ServicePrincipalName is technically Kerberoastable, like computer accounts), AS-REP roastable accounts, weak encryption types, etc. That would probably get more traction than changing defaults out of the box for everyone, as that's another way to phrase "breaking customer environments when they upgrade".

jeffmcjunkin··on Kerberoasting
The RC4 encryption type correlates to the DES hash (more commonly the "NT" hash), so PingCastle has the right warning.
jeffmcjunkin··on I bought the cheapest EV, a used Nissan Leaf
KeySavvy is the normal workaround for this. $99 extra cost to both sides for them to handle the title verification and shipping, and to act as the dealer to make it qualify for EV credits.
jeffmcjunkin··on Introducing Gemma 3n
Thank you, this was affecting me too.
jeffmcjunkin··on CLP Calculus Textbooks
From https://personal.math.ubc.ca/~CLP/about/ :

> For various reasons we have christened these notes “CLP” - none of those reasons can be found [here](https://en.m.wikipedia.org/wiki/CLP)

Presumably it's an inside joke or something.

jeffmcjunkin··on Colorado scrambles to change voting-system passwords after accidental leak
Recently, yes :)

https://www.cnn.com/2023/08/06/us/oregon-drivers-pump-own-fu...

jeffmcjunkin··on What I've Learned in the Past Year Spent Building an AI Video Editor
We don't advance as a society unless people ask new questions. Having folk willing to spend some time answering those questions (in public, no less!) helps others. It's really, really damn hard to predict how advancements in one area can help another.

All that said, thanks for your interesting new question, and thanks for spending time on it :D

jeffmcjunkin··on Ping Ff02:1
Title needs a small fix, it should be `ping ff02::1` (with two colons) to be a valid IPv6 address, match the actual command, and match the original title.
jeffmcjunkin··on Backblaze Scales Storage Cloud
FWIW I've heard the term "dark fiber" used in both ways as well. Whenever there's ambiguity in jargon, I just avoid that jargon and use more words to describe the actual concept.
jeffmcjunkin··on BlackCat ransomware group implodes after apparent payment by Change Healthcare
That helps with "we've encrypted your data; pay us for the key" but doesn't help you with "we've made copies of your patient records, leadership's emails; pay us or we publish it all".

The phrase to describe this is double extortion.

As for your question, https://www.cisa.gov/stopransomware is a decent start, but it's a complicated issue. In short, if a pentester can get inside your environment and gain privileges, so can an attacker. You want to slow down attackers enough to buy time for detection and response capabilities.

jeffmcjunkin··on JetBrains TeamCity Multiple Authentication Bypass Vulnerabilities (Fixed)
Sorry, it was alluded to elsewhere: https://infosec.exchange/@iagox86/112045097519922098

There's more to the story that Rapid7 didn't want to air publicly, and none of it is good for JetBrains.

jeffmcjunkin··on JetBrains TeamCity Multiple Authentication Bypass Vulnerabilities (Fixed)
Yup, silently patching (like JetBrains did) has a lot of downsides. Let alone the deception from JetBrains to the Rapid7 team.

(Disclosure: I know some of the folk on the Rapid7 side, so I'm perhaps biased towards their interpretation of events)

jeffmcjunkin··on Encrypted Client Hello
For whatever reason, Domain Fronting is considered more of an attack behavior, used by red teamers and penetration testers. Doubling down on that behavior likely didn't seem as appealing from a PR perspective.
jeffmcjunkin··on x86 is dead, long live x86
Ahem, that's _9000_.
jeffmcjunkin··on Does Company ‘X’ have an Azure Active Directory Tenant?
Nearly 100% have on-prem AD (full name: "Active Directory: Domain Services"). Azure AD is a separate identity provider -- to a first approximation it's HTTPS and cookies, not Kerberos, LDAP, and Ticket-Granting Tickets that we see on-prem.
jeffmcjunkin··on Does Company ‘X’ have an Azure Active Directory Tenant?
In contrast, the vast majority of companies with Azure AD also have on-prem AD (full name: "Active Directory: Domain Services") with some type of synchronization between them. Usually this amounts to having an on-prem service that shleps password hashes (technically salted, stretched hashed versions of the on-prem hashes) to Azure.
jeffmcjunkin··on T-Mobile: Breach Exposed SSN/DOB of 40M+ People
Smart cards are essentially a big Secure Enclave themselves.

The whole point of a smart card (same as a military CAC, and almost the same as a TPM chip on computers) is to sign operations using the private key, without allowing export of that private key. They're still made of atoms, like all objects, and susceptible to physical key extraction attacks.

jeffmcjunkin··on Privilege escalation with polkit: How to get root on Linux with a seven-year-ol
Title doesn't quite fit, how about this instead?

"Privilege escalation with polkit: Rooting Linux with a 7-year-old bug"

jeffmcjunkin··on Show HN: Endgame – An AWS Pentesting tool to backdoor or expose AWS resources
Bugs get patched. Features are protected, and sometimes simultaneously abused. Thank you!
jeffmcjunkin··on Highly Evasive Attacker Leverages SolarWinds Supply Chain
It strongly implies that the vendor was thoroughly compromised, in order to insert backdoors into their software (possibly amongst other attacker actions).
jeffmcjunkin··on So you've made a mistake and it's public
Oregonian here. I joke that we're the Canadians of the United States.

"Sorry" in regular conversation is a social nicety, very different from a sincere apology, even though the sincere apology may incorporate that same word.

jeffmcjunkin··on V002 Camera Live – Zoom with Your DSLR as a Webcam via USB
Despite that list, it actually works against much older devices. I've ran it with a T2i, for example, which is like three generations older than they officially support.
jeffmcjunkin··on How to Use Trend Micro's Rootkit Remover to Install a Rootkit
Exactly this. Much like the Volatility Framework's psscan[1] module.

[1] https://github.com/volatilityfoundation/volatility/wiki/Comm...

jeffmcjunkin··on Intel’s Xeon Platinum 8284 CPU: When 300 MHz Cost $5,500
Releasing in September: https://www.amd.com/en/products/cpu/amd-ryzen-9-3950x

:)

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