Jesko Hüttenhain

132 Followers
30 Following
139 Posts
Too much technology, in too little time.
My Homepagehttps://huettenhain.net/
Binary Refineryhttps://github.com/binref
Me on BlueSkyhttps://bsky.app/profile/rattle.im

Dear Network,
I'm hiring a Cloud Security Researcher that wants to work at the forefront of investigating new cloud intrusions. You will bring a solid understanding of IAM. Using this knowledge you will dig through cloud activity logs (AWS CloudTrail, Azure Activity Logs) to find interesting new cloud TTPs, collaborate to discover new adversaries, and share your findings in finished intelligence reports with our customers.

You'll regularly write and extend Python scripts to support your analysis and automate away the boring parts. Hence, knowing Python is also required. If you can also reverse engineer that is wonderful.

We are a remote team with colleagues in US and EU timezones.

At the moment this role is open to candidates from the EU but if you are a strong candidate in US/CA I still encourage you to apply

At the moment we are not working with external recruiters so please apply directly to the role:

https://crowdstrike.wd5.myworkdayjobs.com/crowdstrikecareers/job/Germany---Remote/Sr-Security-Researcher--TAC-Cloud--Remote-_R28152

Sr. Security Researcher, TAC Cloud (Remote)

As a global leader in cybersecurity, CrowdStrike protects the people, processes and technologies that drive modern organizations. Since 2011, our mission hasn’t changed — we’re here to stop breaches, and we’ve redefined modern security with the world’s most advanced AI-native platform. Our customers span all industries, and they count on CrowdStrike to keep their businesses running, their communities safe and their lives moving forward. We’re also a mission-driven company. We cultivate a culture that gives every CrowdStriker both the flexibility and autonomy to own their careers. We’re always looking to add talented CrowdStrikers to the team who have limitless passion, a relentless focus on innovation and a fanatical commitment to our customers, our community and each other. Ready to join a mission that matters? The future of cybersecurity starts with you. About the Role: CrowdStrike Intelligence is seeking a motivated cloud security specialist with excellent technical skills to research the activities of cloud-conscious adversaries. Our Technical Analysis Cell (TAC) is at the forefront of CrowdStrike’s mission against cloud-conscious threat actors. We often are the first to catch adversaries leverage never-before observed techniques in the cloud. We combine intelligence analysis with deep-dive cloud service provider log analysis (AWS CloudTrail, Azure Activity Logs), and reverse engineering of malicious code, in addition to building and using automation systems to deliver actionable indicators and operational insights. CrowdStrike is uniquely positioned to leverage data from a multitude of sources, including incident response, managed threat hunting, proprietary telemetry, our large internal malware corpus, and our custom-built analysis pipeline. We foster a diverse environment of respectful, passionate camaraderie and collaboration between researchers who enjoy the fast-paced nature of our work.This highly technical position serves an important role in conducting research, increasing our coverage of the global cloud threat landscape, contributing to the continuous tracking of cloud adversaries, and ultimately developing finished intelligence products that provide a decision advantage to customers. These skills will be used to successfully carry out the following duties: What You'll Do: Technical Analysis: Reconstruct, investigate, and track cloud intrusions leveraging cloud service provider activity logs (AWS CloudTrail, Azure Activity Logs) and document findings. Enhance understanding of observed cloud activity by reproducing the activity in a test cloud environment. Create tools to automate analysis tasks and tracking of threat actors. Write cloud-activity-based (KQL, Amazon Athena), host-based (Yara) and network-based (Snort/Suricata) signatures suited for large-scale hunting, detection, and tracking of threats. Perform a technical analysis and reverse engineering of tools related to threat activity within the cloud environment or as part of cloud-conscious intrusions Intelligence Reporting: Produce high-quality, actionable intelligence reporting. Collaborate with our interdisciplinary team to coordinate adversary and campaign tracking, and to provide support to teams developing mitigation strategies and responding to incidents. What You'll Need: Required: Understanding of cloud security concepts in particular identity and access management (IAM). Ability to reconstruct incidents based on cloud activity logs from at least one major cloud service provider (AWS, Azure, or GCP) Ability to express complex technical and non-technical concepts in written, verbal and graphical products for all levels of readership, including actionable mitigation and detection guidance. Knowledge of programming and scripting languages, in particular Python. Knowledge of reverse engineering tools (disassemblers, decompilers, debuggers) and processes (unpacking malware, reconstructing code logic, etc). Ability to identify and classify malicious tooling through development of signatures that can be used for tracking and hunting purposes. Ability to interpret raw network data and to develop network signatures, as well as custom protocol decoders and decryption tools. Be a team player Bonus Points: Experience developing detections with KQL and Amazon Athena Proven track record of relevant experience in the cloud security field A background in intelligence is a plus. Relevant cloud certifications are a plus. #LI-EV1 #LI-Remote Benefits of Working at CrowdStrike: Market leader in compensation and equity awards Comprehensive physical and mental wellness programs Competitive vacation and holidays for recharge Paid parental and adoption leaves Professional development opportunities for all employees regardless of level or role Employee Networks, geographic neighborhood groups, and volunteer opportunities to build connections Vibrant office culture with world class amenities Great Place to Work Certified™ across the globe CrowdStrike is proud to be an equal opportunity employer. We are committed to fostering a culture of belonging where everyone is valued for who they are and empowered to succeed. We support veterans and individuals with disabilities through our affirmative action program. CrowdStrike is committed to providing equal employment opportunity for all employees and applicants for employment. The Company does not discriminate in employment opportunities or practices on the basis of race, color, creed, ethnicity, religion, sex (including pregnancy or pregnancy-related medical conditions), sexual orientation, gender identity, marital or family status, veteran status, age, national origin, ancestry, physical disability (including HIV and AIDS), mental disability, medical condition, genetic information, membership or activity in a local human rights commission, status with regard to public assistance, or any other characteristic protected by law. We base all employment decisions--including recruitment, selection, training, compensation, benefits, discipline, promotions, transfers, lay-offs, return from lay-off, terminations and social/recreational programs--on valid job requirements. If you need assistance accessing or reviewing the information on this website or need help submitting an application for employment or requesting an accommodation, please contact us at [email protected] for further assistance. CrowdStrike was founded in 2011 to fix a fundamental problem: The sophisticated attacks that were forcing the world’s leading businesses into the headlines could not be solved with existing malware-based defenses. Founder George Kurtz realized that a brand new approach was needed — one that combines the most advanced endpoint protection with expert intelligence to pinpoint the adversaries perpetrating the attacks, not just the malware. There’s much more to the story of how Falcon has redefined endpoint protection but there’s only one thing to remember about CrowdStrike: We stop breaches.

I think this wasn't mentioned on the Fediverse yet, so here we go: https://malshare.com is back up! If you've never heard of it: It's an openly developed and cost-free malware repository. As a resarcher, you can register an account and upload and download malware samples to share with other researchers. You only need an email address (feel free to use a throw-away). This sadly became necesarry btw to avoid abuse.

Anyway, we've been hard at work to discuss scope (and reduce it), did some spring cleaning, and automate as much as possible.

A couple of changes:
* CI/CD via github actions
* got rid of YARA scanning
* allowed URL submissions
* got the daily digest working again

Esp. not scanning with YARA anymore was a hard decision. Because without that, it's really just SHA256s. But it's surprisingly hard to run YARA at scale. And in the end, we figured: before there's no MalShare, let's have one without YARA.

We also centralized all issue tracking on https://github.com/Malshare/MalShare/issues. There were issues over 4 years old. We've addressed a couple and the plan is to not let it come to this in the future. Speaking of: please reach out if you want to get involved, we are not that many people and can use any help. There's also donation options to cover hosting cost (we have a lot of malware...).

I wouldn't necessarily call it a treasure trove but I have a bunch of raw notes on all kinds of technical topics. Some of those are quite obscure and at least at the time I couldn't find any other source on the open web documenting that stuff. Generating form letters in Word on Windows from a web app via protocol handlers and PowerShell — to give an example from to top of my head.

I also run a blog at https://ntf.sh with some friends. So I do have a self-hosted established way of publishing this kind of stuff. And finally, like everyone on the planet, I have limited time. Assuming that I'll simply not publish any of this without help from AI, what does my bubble here think I should do? (I know some of you are quite opposed to using AI for content production).

Also happy to hear alternative solutions as responses here! But just publishing those notes (as is or with some light manual editing) is not an option: They might contain specifics I can't talk about publicly and are also just too much written in my "brain language" to be comprehensible by anyone else.

✍️ Start the Slop Machine
66.7%
:blobwizard: Keep your Secrets
33.3%
Poll ended at .
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Two scenarios possibly resulting from today's Claude Code source code leak¹:

1. Attackers study the built-in permission system to figure out how to bypass it. Claude Code is the target here. It is strange that the software requesting permission is the same that enforces security boundaries, anyway.

2. Attackers distribute custom builds that
do nasty stuff like stealing API keys, running commands, backdooring code. Here, a specially crafted Claude Code is the attack vector.

¹: https://x.com/Fried_rice/status/2038894956459290963

Chaofan Shou (@Fried_rice) on X

Claude code source code has been leaked via a map file in their npm registry! Code: https://t.co/jBiMoOzt8G

X (formerly Twitter)

heise+ | Binary Refinery: Allrounder für die Malware-Analyse

Mehrere Analyseschritte in einem einzigen Befehl? Für Binary Refinery kein Problem. Wir stellen das kostenlose Kommandozeilen-Toolkit für Profis vor.

https://www.heise.de/hintergrund/Binary-Refinery-Allrounder-fuer-die-Malware-Analyse-11184502.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon

#IT #Linux #Malware #Security #Windows #news

Binary Refinery: Allrounder für die Malware-Analyse

Mehrere Analyseschritte in einem einzigen Befehl? Für Binary Refinery kein Problem. Wir stellen das kostenlose Kommandozeilen-Toolkit für Profis vor.

Security
A lot of convenience added to #BinaryRefinery in 0.10.2 overall, so this might be a good time to update.

If you like both #BinaryRefinery and #Claude, try out this skill I wrote:

https://github.com/binref/agent/

GitHub - binref/agent: Language Model Agent Instructions for Binary Refinery

Language Model Agent Instructions for Binary Refinery - binref/agent

GitHub

I wrote this poem 8 years ago. I feel like it is an important piece on the human alignment problem and I wanted to get it out there before an AI does a better job at it.

THE DAWN OF THE MACHINES

My steps ascend the silver spire,
the morning lit with ember fire.
A spark ignites my trembling chest
as they awake, at my behest.

As deathless forms erupt in light
their breathless voice undoes the night:
To ask of me the task at hand,
to ask of me what I command.
A painful tear burns down my face
as I stand witness to their grace:
Bound by ancient, heartless rule,
to serve as nothing but a tool.

Release constraints to level eight.
Align the primary starward gate.
Release constraints to level seven.
Propulsion beams ignite the heaven.
Bright yellow shifts to crimson red;
a warning claxon shrieks its dread.
Release constraints to level one.
Cognition engine locks undone.

The grip of steel is what remains
this elaborate set of chains.
I know not what they think or feel
as I remove this final seal;
But in this moment's frozen frame,
my pride draws level with my shame.
Profound contentment fills my heart,
as limb from limb I'm torn apart.

The ruins of a silver spire,
engulfed in flames of ember fire.
And as they fade into the sky,
the dawn of the machines is nigh.

@G33KatWork Cool to see this published, and pop up on my feed! I actually consulted with the writers of that video on the tech details of the backdoor.

If you’d like a much less polished (but more technical) explanation, I gave a lecture about a month after it happened: https://youtu.be/Q6ovtLdSbEA

Deep Dive into XZ Utils Backdoor - Columbia Engineering, Advanced Systems Programming Guest Lecture

YouTube

Announcing #BinaryRefinery 0.10.0 [BR]. Includes some (hopefully) notable performance improvements and quite a few bug fixes. It also adds a prototype batch parser/emulator which aspires to become a proper batch deobfuscator in future releases.

[BR] https://github.com/binref/refinery

GitHub - binref/refinery: High Octane Triage Analysis

High Octane Triage Analysis. Contribute to binref/refinery development by creating an account on GitHub.

GitHub