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Karl Fosaaen

@kfosaaen.bsky.social
222 followers 160 following 16 posts

VP of Research - @netspi Co-author of “Penetration Testing Azure for Ethical Hackers” (amzn.to/3GOvW3A). @kfosaaen on most other platforms

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Karl Fosaaen @kfosaaen.bsky.social · 24/07/2025
Building off of @codyburkard.com's prior work, I put together a tool for automating the decryption of Entra ID application tokens from Azure App Services resources. Here's a blog that outlines the tooling: www.netspi.com/blog/technic...
netspi.com
Automating Azure App Services Token Decryption | Tech Blog - NetSPI
Discover how to decrypt Azure App Services authentication tokens automatically using MicroBurst’s tooling to extract encrypted tokens for security testing.
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Karl Fosaaen @kfosaaen.bsky.social · 18/07/2025
I'm very excited to share that Thomas Elling and I will be presenting "We Know What You Did (in Azure) Last Summer" at the DEF CON @cloudvillage-dc.bsky.social this year (Friday - 10 AM). We will go over some techniques that can be used to find the owners of multiple types of Azure resources.
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Reposted by Karl Fosaaen
NetSPI @netspi.bsky.social · 08/07/2025
NetSPI Principal Security Consultant Jason Juntunen recently published findings on a Remote Code Execution vulnerability in SailPoint's IQService component. 👉 Read the full technical breakdown: ow.ly/GbT150WmgRg #proactivesecurity #VulnerabilityResearch
netspi.com
Set Sail: Remote Code Execution in SailPoint IQService via Default Encryption Key
NetSPI discovered a remote code execution vulnerability in SailPoint IQService using default encryption keys. Exploit details, discovery methods, and remediation guidance included.
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Karl Fosaaen @kfosaaen.bsky.social · 01/07/2025
I have a new post out on the @netspi.bsky.social blog today. This one is on extracting sensitive information from the Azure Load Testing service. www.netspi.com/blog/technic...
netspi.com
Extracting Sensitive Information from Azure Load Testing
Learn how Azure Load Testing's JMeter JMX and Locust support enables code execution, metadata queries, reverse shells, and Key Vault secret extraction vulnerabilities.
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Reposted by Karl Fosaaen
Scott Sutherland @nullbind.bsky.social · 02/04/2025
I had a great time at #socon2025! Big thanks to the SpecterOps crew for hosting. Slides for my "Hunting SMB Shares" talk are below for those who are interested. Slides github.com/NetSPI/Power... PowerHuntShares github.com/NetSPI/Power...
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Reposted by Karl Fosaaen
Katie Moussouris (she/her/she-hulk/she-ra)🌻 @k8em0.bsky.social · 01/05/2025
If you’re on the fence about signing on to that @eff.org letter to support @thekrebscycle.bsky.social , please consider doing it sooner rather than later. Don’t wait until there’s no one left to speak for you. #RSAC2025 www.cnn.com/2025/04/30/p...
cnn.com
Chris Krebs kicked off CBP’s Global Entry program | CNN Politics
Chris Krebs’, President Donald Trump’s former director of the Cybersecurity and Infrastructure Security Agency, membership in Global Entry has been revoked. Krebs, who has repeatedly attested to the s...
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Karl Fosaaen @kfosaaen.bsky.social · 27/02/2025
If anyone wants to help out on a (hopefully) easy update for some functions in MicroBurst, we will need to make some adjustments for "Get-AzAccessToken" token output switching to a SecureString in Az PS 14.0.0 github.com/NetSPI/Micro...
github.com
Changes to Get-AzAccessToken token output (String to SecureString) · Issue #46 · NetSPI/MicroBurst
The Get-AzAccessToken cmdlet token output will be switching to a SecureString in version 14.0.0. There are currently several MicroBurst functions that make use of this cmdlet to get tokens. We will...
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Karl Fosaaen @kfosaaen.bsky.social · 11/02/2025
Quick addition to Get-AzPasswords in MicroBurst - Azure OpenAI keys This new section will dump any available OpenAI keys from Cognitive Services deployments that your user has list key permissions on. github.com/NetSPI/Micro...
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Karl Fosaaen @kfosaaen.bsky.social · 08/01/2025
In addition to the blog out today, there's a new tool in MicroBurst - Get-AzMachineLearningCredentials This one has been in the works for a while, but it's a tool to dump the credentials that are stored by the Azure Machine Learning service. github.com/NetSPI/Micro...
github.com
MicroBurst/Az/Get-AzMachineLearningCredentials.ps1 at master · NetSPI/MicroBurst
A collection of scripts for assessing Microsoft Azure security - NetSPI/MicroBurst
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Karl Fosaaen @kfosaaen.bsky.social · 08/01/2025
New @netspi.bsky.social blog out today on "Hijacking Azure Machine Learning Notebooks (via Storage Accounts)". This is very similar to Storage Account attacks that have been done against Function/Logic Apps and Cloud Shell - www.netspi.com/blog/technic...
netspi.com
Hijacking Azure Machine Learning Notebooks (via Storage Accounts)
Abusing Storage Account Permissions to attack Azure Machine Learning notebooks
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Karl Fosaaen @kfosaaen.bsky.social · 30/12/2024
A big thank you to MSRC for the 2024 MVR merch! This is a nice way to wrap up the year.
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Reposted by Karl Fosaaen
NetSPI @netspi.bsky.social · 16/12/2024
Balancing usability and security in deployments introduce new and unfamiliar risks to organizations. NetSPI created an open Large Language Model (LLM) framework to help clarify some ambiguity around LLM security. Read more about this framework in our most recent article: ow.ly/Nhjs50Usaio
netspi.com
Balancing Security and Usability of Large Language Models: An LLM Benchmarking Framework
Explore the integration of Large Language Models (LLMs) in critical systems and the balance between security and usability with a new LLM benchmarking framework.
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Reposted by Karl Fosaaen
NetSPI @netspi.bsky.social · 17/12/2024
What happens when you prioritize security over usability in AI models—or vice versa? Our Open LLM Security Benchmark dives deep into the trade-offs and implications, showcasing why this balance is critical for the future of AI. Access the paper here: ow.ly/zT2g50UsaZH
ow.ly
GitHub - NetSPI/Open-LLM-Security-Benchmark
Contribute to NetSPI/Open-LLM-Security-Benchmark development by creating an account on GitHub.
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Karl Fosaaen @kfosaaen.bsky.social · 16/12/2024
This is some really exciting work from our team. Make sure to check out the benchmark repo on GitHub -https://github.com/NetSPI/Open-LLM-Security-Benchmark/tree/main
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Reposted by Karl Fosaaen
Scott Sutherland @nullbind.bsky.social · 28/11/2024
PowerHuntShares.v2: New Sample HTML Report Here is a sample report for those who wanted it. Enjoy! raw.githubusercontent.com/NetSPI/PowerHu…
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Reposted by Karl Fosaaen
Andy Robbins @andyrobbins.bsky.social · 20/11/2024
A quick tour of new functions in BARK that support Azure Key Vault tradecraft research, including a walk-through of how an adversary may chain these functions together as part of an attack path: posts.specterops.io/azure-key-va...
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Karl Fosaaen @kfosaaen.bsky.social · 18/11/2024
I had an amazing time last week attending and speaking at the Hybrid Identity Protection conference in New Orleans. There was a really solid line up of presentations and I was honored to be included this year.
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