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When Breaches Cascade in Chain Reaction Chaos

Threat Brief Snapshot

Incident:Modern breaches no longer stop at the initial compromise — they cascade across authenticated sessions, dependencies, cloud infrastructure, automation CI/CD pipelines, trusted browser extensions, and interconnected software systems long after the initial compromise occurs, and faster than security teams can react.

May 19, 2026

War Stories

Notes from the Frontline

JadePuffer ransomware used AI agent to automate entire attack

Researchers identified what they believe is the first documented case of a ransomware operation, JadePuffer, conducted entirely by a large language model (LLM) agent. [...]

Bill Toulas

Jul 04, 2026, 14:16

U.S. Government Entity Paid Kairos $1 Million in Data-Theft Extortion Case

A U.S. government entity paid about $1 million to keep stolen files from being leaked, according to a new case study by Rakesh Krishnan for Ransom-ISAC, built on a leaked negotiation chat and the blockchain trail the payment left. The odd part: the group that took the money calls itself Kairos, but it may not be a ransomware gang at all. Krishnan found no sign that it ever locked a single

The Hacker News

Jul 04, 2026, 12:47

North Korean Hackers Publish 108 Malicious Packages and Extensions in PolinRider Campaign

The North Korean threat actors linked to the Contagious Interview campaign have been observed publishing 108 unique packages and web browser extensions spanning npm, Packagist, Go, and Google Chrome as part of an ongoing activity referred to as PolinRider. "The campaign remains active, and new malicious packages are likely to continue appearing as threat actors compromise maintainer accounts,

The Hacker News

Jul 04, 2026, 11:17

Unpatched Flaws Disclosed in Filesystem Bundled Into Millions of Embedded Devices

Security firm runZero has disclosed seven vulnerabilities in FatFs, a small filesystem library that lets a device read and write the FAT and exFAT formats used on USB drives and SD cards. The flaws matter because FatFs is nearly everywhere. It ships inside the firmware that runs security cameras, drones, industrial controllers, hardware crypto wallets, and other devices built on

The Hacker News

Jul 03, 2026, 20:19

New "Bad Epoll" Linux Kernel Flaw Lets Unprivileged Users Gain Root, Hits Android

A newly disclosed Linux kernel flaw called Bad Epoll (CVE-2026-46242) lets an ordinary user with no special access take full control of a machine as root. It affects Linux desktops, servers, and Android, and a fix is out. Bad Epoll sits in the same small stretch of kernel code where Anthropic's most powerful AI model, Mythos, recently found a different bug. The AI caught one flaw and missed

The Hacker News

Jul 03, 2026, 19:40

New Avalon Malware Framework Packs CrownX Ransomware Capabilities

Cybersecurity researchers have discovered a previously undocumented modular malware framework codenamed Avalon that's distributed by means of a multi-stage phishing chain capable of bypassing traditional security controls. Avalon combines credential collection, lateral movement, remote access, recovery disruption, and ransomware execution, bringing together diverse functions under one

The Hacker News

Jul 03, 2026, 18:55

NetNut proxy network disrupted, 2 million infected devices cut off

A joint operation involving Google has disrupted NetNut, a residential proxy network that gave access to millions of compromised Android devices, including smart TVs and streaming boxes. [...]

Ionut Ilascu

Jul 03, 2026, 17:50

North Korea-Linked npm Packages Mimic Rollup Polyfills to Steal Developer Secrets

Threat actors with ties to North Korea have been linked to a fresh set of malicious npm packages that masquerade as Rollup polyfill tooling to facilitate remote access and data theft. According to JFrog, the packages "rollup-packages-polyfill-core" and "rollup-runtime-polyfill-core" mimic the legitimate "rollup-plugin-polyfill-node" project, down to the description, repository metadata, and

The Hacker News

Jul 03, 2026, 16:07

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Newsroom

When Breaches Cascade in Chain Reaction Chaos

Threat Brief Snapshot

War Stories

JadePuffer ransomware used AI agent to automate entire attack

U.S. Government Entity Paid Kairos $1 Million in Data-Theft Extortion Case

North Korean Hackers Publish 108 Malicious Packages and Extensions in PolinRider Campaign

Unpatched Flaws Disclosed in Filesystem Bundled Into Millions of Embedded Devices

New "Bad Epoll" Linux Kernel Flaw Lets Unprivileged Users Gain Root, Hits Android

New Avalon Malware Framework Packs CrownX Ransomware Capabilities

NetNut proxy network disrupted, 2 million infected devices cut off

North Korea-Linked npm Packages Mimic Rollup Polyfills to Steal Developer Secrets

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JadePuffer ransomware used AI agent to automate entire attack

U.S. Government Entity Paid Kairos $1 Million in Data-Theft Extortion Case

North Korean Hackers Publish 108 Malicious Packages and Extensions in PolinRider Campaign

Unpatched Flaws Disclosed in Filesystem Bundled Into Millions of Embedded Devices

New "Bad Epoll" Linux Kernel Flaw Lets Unprivileged Users Gain Root, Hits Android

New Avalon Malware Framework Packs CrownX Ransomware Capabilities

NetNut proxy network disrupted, 2 million infected devices cut off

North Korea-Linked npm Packages Mimic Rollup Polyfills to Steal Developer Secrets