Security News

Claude Code Security Shows Promise, Not Perfection

Claude Code's introduction rippled across the stock market, but researchers and analysts say its impact was overstated, as they peel back the layers.

ScarCruft Uses Zoho WorkDrive and USB Malware to Breach Air-Gapped Networks

The North Korean threat actor known as ScarCruft has been attributed to a fresh set of tools, including a backdoor that uses Zoho WorkDrive for command-and-control (C2) communications to fetch more payloads and an implant that uses removable media to relay commands and breach air-gapped networks. The campaign, codenamed Ruby Jumper by Zscaler ThreatLabz, involves the deployment of malware

Fake Fedex Email Delivers Donuts!, (Fri, Feb 27th)

It&#x27s Friday, let&#x27s have a look at another simple piece of malware to close a busy week! I received a Fedex notification about a delivery. Usually, such emails are simple phishing attacks that redirect you to a fake login page to collect your credentials. Here, it was a bit different:

Trojanized Gaming Tools Spread Java-Based RAT via Browser and Chat Platforms

Threat actors are luring unsuspecting users into running trojanized gaming utilities that are distributed via browsers and chat platforms to distribute a remote access trojan (RAT). "A malicious downloader staged a portable Java runtime and executed a malicious Java archive (JAR) file named jd-gui.jar," the Microsoft Threat Intelligence team said in a post on X. "This downloader used PowerShell

Meta Files Lawsuits Against Brazil, China, Vietnam Advertisers Over Celeb-Bait Scams

Meta on Thursday said it's taking legal action to tackle scams on its platforms by filing lawsuits against what it calls deceptive advertisers based in Brazil, China, and Vietnam. As part of the effort, the advertisers' methods of payment have been suspended, related accounts have been disabled, and the website domain names used to pull off the scams have been blocked. Concurrently, the social

ISC Stormcast For Friday, February 27th, 2026 https://isc.sans.edu/podcastdetail/9828, (Fri, Feb 27th)

Marquis v. SonicWall Lawsuit Ups the Breach Blame Game

When a company gets breached through a third-party security vendor, who should bear responsibility? For one FinTech company, the answer is the firewall provider.

Cisco SD-WAN Zero-Day Under Exploitation for 3 Years

The maximum-severity vulnerability CVE-2026-20127 was exploited by an unknown but sophisticated threat actor who left very little evidence behind.

Aeternum C2 Botnet Stores Encrypted Commands on Polygon Blockchain to Evade Takedown

Cybersecurity researchers have disclosed details of a new botnet loader called Aeternum C2 that uses a blockchain-based command-and-control (C2) infrastructure to make it resilient to takedown efforts. "Instead of relying on traditional servers or domains for command-and-control, Aeternum stores its instructions on the public Polygon blockchain," Qrator Labs said in a report shared with The

UAT-10027 Targets U.S. Education and Healthcare with Dohdoor Backdoor

A previously undocumented threat activity cluster has been attributed to an ongoing malicious campaign targeting education and healthcare sectors in the U.S. since at least December 2025. The campaign is being tracked by Cisco Talos under the moniker UAT-10027. The end goal of the attacks is to deliver a never-before-seen backdoor codenamed Dohdoor. "Dohdoor utilizes the DNS-over-HTTPS (DoH)

ThreatsDay Bulletin: Kali Linux + Claude, Chrome Crash Traps, WinRAR Flaws, LockBit & 15+ Stories

Nothing here looks dramatic at first glance. That’s the point. Many of this week’s threats begin with something ordinary, like an ad, a meeting invite, or a software update. Behind the scenes, the tactics are sharper. Access happens faster. Control is established sooner. Cleanup becomes harder. Here is a quick look at the signals worth paying attention to. AI-powered command

Expert Recommends: Prepare for PQC Right Now

Introduction: Steal It Today, Break It in a Decade Digital evolution is unstoppable, and though the pace may vary, things tend to fall into place sooner rather than later. That, of course, applies to adversaries as well. The rise of ransomware and cyber extortion generated funding for a complex and highly professional criminal ecosystem. The era of the cloud brought general availability of

Microsoft Warns Developers of Fake Next.js Job Repos Delivering In-Memory Malware

A "coordinated developer-targeting campaign" is using malicious repositories disguised as legitimate Next.js projects and technical assessments to trick victims into executing them and establish persistent access to compromised machines. "The activity aligns with a broader cluster of threats that use job-themed lures to blend into routine developer workflows and increase the likelihood of code

Malicious StripeApi NuGet Package Mimicked Official Library and Stole API Tokens

Cybersecurity researchers have disclosed details of a new malicious package discovered on the NuGet Gallery, impersonating a library from financial services firm Stripe in an attempt to target the financial sector. The package, codenamed StripeApi.Net, attempts to masquerade as Stripe.net, a legitimate library from Stripe that has over 75 million downloads. It was uploaded by a user named

Cisco SD-WAN Zero-Day CVE-2026-20127 Exploited Since 2023 for Admin Access

A newly disclosed maximum-severity security flaw in Cisco Catalyst SD-WAN Controller (formerly vSmart) and Catalyst SD-WAN Manager (formerly vManage) has come under active exploitation in the wild as part of malicious activity that dates back to 2023. The vulnerability, tracked as CVE-2026-20127 (CVSS score: 10.0), allows an unauthenticated remote attacker to bypass authentication and obtain

Finding Signal in the Noise: Lessons Learned Running a Honeypot with AI Assistance [Guest Diary], (Tue, Feb 24th)

[This is a Guest Diary by Austin Bodolay, an ISC intern as part of the SANS.edu BACS program]

ISC Stormcast For Thursday, February 26th, 2026 https://isc.sans.edu/podcastdetail/9826, (Thu, Feb 26th)

Chinese Police Use ChatGPT to Smear Japan PM Takaichi

A Chinese keyboard warrior inadvertently leaked information about politically motivated influence operations through a ChatGPT account.

Flaws in Claude Code Put Developers' Machines at Risk

The vulnerabilities highlight a big drawback to integrating AI into software development workflows and the potential impact on supply chains.

RAMP Forum Seizure Fractures Ransomware Ecosystem

Researchers suggest defenders monitor how these malicious groups re-form and leverage the useful threat intel to guide their next moves.