A hacktivist group with links to Iran's intelligence agencies is claiming responsibility for a data-wiping attack against Stryker, a global medical technology company based in Michigan. News reports out of Ireland, Stryker's largest hub outside of the United States, said the company sent home more than 5,000 workers there today. Meanwhile, a voicemail message at Stryker's main U.S. headquarters says the company is currently experiencing a building emergency.
Microsoft Corp. today pushed security updates to fix at least 77 vulnerabilities in its Windows operating systems and other software. There are no pressing "zero-day" flaws this month (compared to February's five zero-day treat), but as usual some patches may deserve more rapid attention from organizations using Windows. Here are a few highlights from this month's Patch Tuesday.
AI-based assistants or "agents" -- autonomous programs that have access to the user's computer, files, online services and can automate virtually any task -- are growing in popularity with developers and IT workers. But as so many eyebrow-raising headlines over the past few weeks have shown, these powerful and assertive new tools are rapidly shifting the security priorities for organizations, while blurring the lines between data and code, trusted co-worker and insider threat, ninja hacker and novice code jockey.
In early January 2026, KrebsOnSecurity revealed how a security researcher disclosed a vulnerability that was used to assemble Kimwolf, the world's largest and most disruptive botnet. Since then, the person in control of Kimwolf -- who goes by the handle "Dort" -- has coordinated a barrage of distributed denial-of-service (DDoS), doxing and email flooding attacks against the researcher and this author, and more recently caused a SWAT team to be sent to the researcher's home. This post examines what is knowable about Dort based on public information.
Most phishing websites are little more than static copies of login pages for popular online destinations, and they are often quickly taken down by anti-abuse activists and security firms. But a stealthy new phishing-as-a-service offering lets customers sidestep both of these pitfalls: It uses cleverly disguised links to load the target brand's real website, and then acts as a relay between the target and the legitimate site -- forwarding the victim's username, password and multi-factor authentication (MFA) code to the legitimate site and returning its responses.
Crypto-powered gift card store Bitrefill says that the attack it suffered at the beginning of the month was likely perpetrated by North Korean hackers of the Bluenoroff group. [...]
The FBI has seized two websites used by the Handala hacktivist group after the threat actors conducted a destructive cyberattack on medical technology giant Stryker that wiped approximately 80,000 devices. [...]
Hackers part of APT28, a state-backed threat group linked to Russia's military intelligence service (GRU), are exploiting a Zimbra Collaboration Suite (ZCS) vulnerability in attacks targeting Ukrainian government entities. [...]
Password resets are often weaker than login security, making them a prime target for privilege escalation. Specops Software explains how attackers abuse reset workflows and how to secure them. [...]
Ubiquiti has patched two vulnerabilities in the UniFi Network Application, including a maximum-severity flaw that may allow attackers to take over user accounts. [...]
A new analysis of endpoint detection and response (EDR) killers has revealed that 54 of them leverage a technique known as bring your own vulnerable driver (BYOVD) by abusing a total of 34 vulnerable drivers. EDR killer programs have been a common presence in ransomware intrusions as they offer a way for affiliates to neutralize security software before deploying file-encrypting malware. This
ThreatsDay Bulletin is back on The Hacker News, and this week feels off in a familiar way. Nothing loud, nothing breaking everything at once. Just a lot of small things that shouldn’t work anymore but still do. Some of it looks simple, almost sloppy, until you see how well it lands. Other bits feel a little too practical, like they’re already closer to real-world use than anyone
Cybersecurity researchers have disclosed a new Android malware family called Perseus that's being actively distributed in the wild with an aim to conduct device takeover (DTO) and financial fraud. Perseus is built upon the foundations of Cerberus and Phoenix, at the same time evolving into a "more flexible and capable platform" for compromising Android devices through dropper apps distributed
Security teams have spent years building identity and access controls for human users and service accounts. But a new category of actor has quietly entered most enterprise environments, and it operates entirely outside those controls. Claude Code, Anthropic's AI coding agent, is now running across engineering organizations at scale. It reads files, executes shell commands, calls external APIs,
A new exploit kit for Apple iOS devices designed to steal sensitive data from is being wielded by multiple threat actors since at least November 2025, according to reports from Google Threat Intelligence Group (GTIG), iVerify, and Lookout. According to GTIG, multiple commercial surveillance vendors and suspected state-sponsored actors have utilized the full-chain exploit kit, codenamed DarkSword