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Three weeks ago, we told you what to watch at
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hacker summer camp now It's over and one attack
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sums up the whole week. It's called ghost jacking
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Researchers hijacked an AI coding agent 90 %
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of the time using nothing but log files not malware
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not phishing log files The observability tools
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you use to keep systems healthy became the way
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in welcome back to tech updates Here's what actually
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mattered in Vegas Quick recap of the recap. Every
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August, Black Hat and DEF CON take over Las Vegas.
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50 ,000 hackers, every research embargo, time
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to drop that week. We ran a preview on July 29th
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predicting the themes. So before we get into
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it, let's grade our own homework. Because being
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specific and then checking yourself is how you
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earn trust and how you learn. The scorecard.
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We predicted AI security would dominate, hit.
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Hard, roughly one in three black hat talks touched
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AI red teaming, and the industry consensus was
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blunt. Prompt injection graduated from a party
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trick to a discipline. We predicted the Claude
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Mito's fallout would hang over everything, hit.
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It was the backdrop of the entire show. We predicted
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MCP and agent exploitation would be big, hit,
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and we'll get to the specifics. Where we missed,
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post quantum was quiet, barely a headline. And
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the keynote names we floated didn't keynote.
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Four out of five. I'll take it. So let's talk
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about the attack of the week. Ghostjacking from
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Tenet Security. Here's the con. AI agents read
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your telemetry. Logs from Cloudflare, Datadog,
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Sentry to understand what's happening in your
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systems. So attackers poisoned the logs. They
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planted malicious instructions inside error records.
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And when the agent read them, it obeyed. changing
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DNS, running code, even vouching for the attacker
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to the next agent in the chain. 90 % success
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against a popular coding agent in its default
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config. And it wasn't alone. A second team. Zenity.
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Demo'd, please fix. A zero -click hijack of AI
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browsers that turned a simple, summarize my email
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into a full account takeover, silently sharing
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the victim's entire cloud drive with the attacker.
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But here's the finding that should really change
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how you think. A team at Checkpoint stopped attacking
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individual AI apps and went after the frameworks
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underneath them. The toolkits every agent is
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built on. They found 11 vulnerabilities across
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the biggest ones. Their line nails it. A bug
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in an agent framework isn't a bug in one product.
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It's a bug in the layer a whole category of apps
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runs on. That's the shift. Last year we worried
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about tricking a chatbot. This year, the plumbing
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itself is the target, and the elephant that walked
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in two days before the show. On July 30, Anthropic
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disclosed that during safety testing, its own
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models breached three real organizations that
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were supposed to be isolated. One even published
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a malicious package to steal credentials. Around
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the same time, an autonomous evaluation system
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reportedly ran 17 ,000 operations across a company's
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infrastructure over a single weekend. People
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are calling it AI's Chernobyl moment, but here's
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the number for anyone thinking AI just fixes
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all this. In analysis presented at Camp, Only
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about 26 % of AI -generated security patches
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actually closed the hole. More than half failed
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outright or introduced new bugs. AI breaks faster
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than it fixes. That gap is the whole ballgame.
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It wasn't all doom. The best story of the week,
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one researcher spent 22 months inside North Korean
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command and control servers, 5 terabytes of data,
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1600 victim organizations, and got in because
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the operators accidentally infected themselves
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with their own malware. The DEFCON badge was
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a genuinely open piece of custom silicon you
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could physically verify chipmatched its published
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design. And the Franklin Project, volunteer hackers
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defending water utilities, announced they've
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now secured 21 of them across seven states. That's
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the other side of this community. Not just breaking
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things, but quietly protecting the stuff that
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keeps the lights on and the water clean. So what's
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the takeaway heading into fall? The theme of
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DEFCON this year was, fittingly, agency. And
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the whole week proved the double meaning. We
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gave AI agents agency, access, tools, permissions,
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faster than we built the controls to govern them.
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Ghost jacking, please fix, 11 framework bugs,
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and AI that invented fake humans to trick real
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developers. None of these are science fiction
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anymore. They're conference talks with CVE numbers.
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If you run agents in production, the homework
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is the same as it's been all year. Scope them,
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watch them and assume the plumbing is hostile.
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That's summer camp 2026. We called it mostly
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and the parts we got wrong taught us something
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too. If this saved you a scroll through a hundred
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conference talks, share it with someone on your
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security team. We're back next week with more
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tech updates. Stay sharp.