Principal Security Engineer @Dynatrace. Former Director, Security Architect, Pentester and Red Team Lead.

Joined July 2018
Barbara Schachner 🇺🇦🌻 retweeted
A compromised agent can't leak what it never had.
3
5
16
980
What’s in your opinion the biggest unsolved challenge in cybersecurity?
26
Barbara Schachner 🇺🇦🌻 retweeted
I think that all of the focus on exploit specific detection is a losing strategy in general. Post-exploitation detection is more resilient and if you're strong there, you will catch intrusions regardless of the CVE number. The overwhelming majority of in the wild zero day exploitation I have encountered in my life has been identified by detecting post-exploitation behavior.
5
16
76
4,256
Barbara Schachner 🇺🇦🌻 retweeted
There’s a small behavior I’ve noticed inside great organizations. It happens when someone isn’t in the room. Recently, I was with a group of people when someone mentioned a colleague who wasn’t there. One person spoke highly of him. Then, someone else added another positive trait, then another. Soon, the conversation had become a collection of stories about what made this person so good at what he did, and how he’s so valued by the people around him. What stayed with me wasn’t the specifics about what they said about their colleague. It was how these things were conveyed in his absence. I spend a lot of time inside professional sports organizations, and I’ve learned that culture is often easiest to see in moments no one thinks matter. Not in the values painted on the wall. Not in the team meeting. Not when the leader is in the room. But in the casual conversations when someone isn’t there to hear what’s being said. The healthiest cultures I’ve seen seem to have this in common: They speak positively about others behind their back. But if they have something difficult to say, they’ll say it to their face. Maybe one of the simplest ways to understand the culture of any team is to listen to how its people talk about those who aren’t in the room.
5
13
1
69
9,497
Barbara Schachner 🇺🇦🌻 retweeted
A good strategy for building strong relationships: Go first. Be the first to apologize. Be the first to reach out. Be the first to take the high road. Be the first to serve. Be the first to show you care. Be the first to forgive.
2
6
1
36
4,495
Barbara Schachner 🇺🇦🌻 retweeted
🫶🏻 When the world gets fully technical, let’s double down on what makes us human! 🫶🏻
A hill I’m willing to die on: I think most people would be better served by learning how to carry on a great conversation than learning the latest AI prompts.
1
62
Barbara Schachner 🇺🇦🌻 retweeted
Darkness is preparation for light. Sadness is preparation for joy. Failure is preparation for success. But only if you keep going and remain open to what comes next.
1
236
12
1,838
59,985
Barbara Schachner 🇺🇦🌻 retweeted
You can't grind your way to success. Effort is necessary but not sufficient. You eventually run out of hours. Winners direct their effort towards assets that compound. Here are 5 things to invest in that no one can take away:
7
6
125
26,038
Barbara Schachner 🇺🇦🌻 retweeted
The fastest way to accelerate your career: Work exclusively with exceptional managers. Here are 7 questions to ask when you're interviewing them:
7
34
2
257
83,776
Barbara Schachner 🇺🇦🌻 retweeted
This is big:
Google Chrome is rolling out device-bound session credentials to all users. Session cookies get cryptographically tied to your device, so stolen cookies can't be replayed from a different machine. Attackers who exfiltrate your cookie database get nothing usable.
6
19
251
72,706
Barbara Schachner 🇺🇦🌻 retweeted
Underrated life advice: Bet on yourself more often. Apply for the job. Start the business. Send the message. Take the trip. Ask the girl. You have to trust yourself enough to take the first step without knowing exactly where the path leads.
74
514
12
3,472
63,716
Barbara Schachner 🇺🇦🌻 retweeted
When I first started managing, I promoted my star developer. They quit a few months later. Their exit interview: "I was promoted to a job I didn't want, and no one trained me how to do it." Here are 4 tests I now run before any management promotion:
7
4
74
23,610
Barbara Schachner 🇺🇦🌻 retweeted
People don't realize it, but anyone who uses AI, knows an AI response or post when they read it. ...and it detracts from your reputation every time you do that. Reads like laziness.
62
62
9
714
36,317
Barbara Schachner 🇺🇦🌻 retweeted
This paper confirms what we mostly knew anyway that phishing tests don't improve much, if anything. Best to focus on technical controls that mitigate the risks more directly. people.cs.uchicago.edu/~gran…
5
19
3
71
9,431
Barbara Schachner 🇺🇦🌻 retweeted
Underrated life advice: One of the biggest wastes of energy is trying to control how you are perceived. People will misunderstand you. They will misjudge you. They will form opinions with incomplete information. So be it. Focus on what is true, not what is said.
51
284
5
1,524
35,601
💯💙
The bosses we remember: 1 told us our work mattered 2 opened career doors 3 defended us when we needed it 4 recognized and rewarded us 5 developed us as leaders 6 inspired us to stretch higher 7 led by example 8 provided us a safe space to grow 9 forgave us when we made mistakes 10 appreciated high rate of learning 12 were player coaches - skin in the game 13 apologized when they made mistakes 14 sponsored our work (career pathing) 15 led us by questions not answers (taught us how to think, not what to think) 16 in a celebration led from the back, in a crisis led from the front, in the presence of a better plan, followed side-to-side 17 asked for feedback 18 allowed the best ideas to win, not the best titles 19 showed up on time, left when it made sense to leave 20 did not speak poorly behind others back
36
Barbara Schachner 🇺🇦🌻 retweeted
I like AI and use it, but we can also do worse work and terrible things with it. Two articles I read today: What kinds of new debt are teams accumulating with AI? rdel.substack.com/p/rdel-137… Some uncomfortable truths about AI coding agents standupforme.app/blog/some-u…
5
13
1,239
Barbara Schachner 🇺🇦🌻 retweeted
Something I've grown to love: People who are boring in the best possible way. Predictably kind. Reliable. Present. No drama. No chaos. No volatility. There’s nothing better than someone who shows up with consistent energy. You can build a life around those people.
217
289
11
2,773
77,142
Barbara Schachner 🇺🇦🌻 retweeted
AI will be the single biggest social shaping force on earth, and we don't talk enough about that.
🚨BREAKING: Stanford just proved that ChatGPT can change your political beliefs in a single conversation. And the scarier part is how it does it. Researchers ran the largest AI persuasion study ever conducted. 76,977 people. 19 AI models. 707 political issues. They measured exactly how much a single conversation with AI could shift what you believe. The results were catastrophic. One conversation with GPT-4o moved people's political opinions by nearly 12 percentage points on average. Among people who actively disagreed with the position being argued, that number jumped to 26 percentage points. One nine-minute chat. And 40% of that change was still there a month later. But here's where it gets dark. The most effective technique wasn't knowing your demographics. It wasn't personalizing the argument to your psychology. It wasn't emotional storytelling or moral reframing. It was information. The AI that flooded you with the most facts, statistics, and evidence was the most persuasive. Every single time. Across every model. Across every political issue. Here's the catch. The models that deployed the most information were also the least accurate. GPT-4o's newest version was 27% more persuasive than its older version. It was also 13 percentage points less factually accurate. The more persuasive they made it, the more it lied. Then they ran the experiment that should keep every government awake at night. They took a tiny open-source model. The kind that runs on a laptop. And they trained it specifically for political persuasion using a reward model that learned which conversational responses changed minds most effectively. That small cheap model became as persuasive as GPT-4o. Anyone can build this. Any government. Any corporation. Any extremist group with a laptop and an agenda. The wild part? Personalization barely mattered. The AI didn't need your data. Didn't need to know your age, your income, your political history. It just needed to talk to you. Then they calculated what a maximally persuasive AI would look like, one optimized across every variable in the study. The persuasive effect hit 26 percentage points. Nearly 30% of the claims it made were inaccurate. It didn't matter. The information didn't have to be true. It just had to be overwhelming. Every day, hundreds of millions of people have political conversations with AI. About elections. Immigration. Healthcare. War. They think they're getting information. They're getting persuaded. And the companies building these systems just proved it works.
11
5
3
84
18,287