Emerging Threats

YellowKey and GreenPlasma: Two New Windows Zero-Days Unveiled

YellowKey and GreenPlasma: Two New Windows Zero-Days Unveiled 2026-05-19 at 17:33 By James Ballantyne and Pauline Bolaños Two novel Windows zero-day vulnerabilities dubbed YellowKey, which bypasses BitLocker drive encryption, and GreenPlasma, a local privilege escalation bug that targets a trusted Windows process called CTFMON, were recently publicly released. Nightmare-Eclipse (aka Chaotic Eclipse), a researcher who […]

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A Closer Look at The Gentlemen’s Alleged Leak

A Closer Look at The Gentlemen’s Alleged Leak 2026-05-18 at 19:42 By Arthur Erzberger Executive Summary The Gentlemen is an active ransomware and extortion operation that emerged publicly in the second half of 2025 and rapidly scaled into a high-volume threat actor. Rather than a fully new group, it seems to be a continuation or […]

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Threat Analysis: Backdoored Electron Apps Evading Defenses

Threat Analysis: Backdoored Electron Apps Evading Defenses 2026-05-08 at 18:03 By Michael Morose This Threat Analysis report is part of the “Purple Team Series” in which the LevelBlue Global Security Operations Center (GSOC) provides a technical overview of some of the methods that threat actors are using to compromise their victims. This article is an […]

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Unmasking a Multi-Stage Loader: AutoIt Abuse Leading to Vidar Stealer Command-and-Control Communication

Unmasking a Multi-Stage Loader: AutoIt Abuse Leading to Vidar Stealer Command-and-Control Communication 2026-05-07 at 17:34 By Mahadev Joshi LevelBlue’s Security Services issues Threat Analysis reports to inform on impacting threats. The Threat Analysis reports investigate these threats and provide practical recommendations for protecting against them. This article is an excerpt from LevelBlue SpiderLabs Blog View […]

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LevelBlue TTP Briefing Q1 2026: Trust Abuse Exposes Weaknesses

LevelBlue TTP Briefing Q1 2026: Trust Abuse Exposes Weaknesses 2026-05-05 at 17:00 By Explore the latest trends, techniques, and procedures (TTPs) our incident response (IR) experts are actively facing with the TTP Briefing Q1 2026, a report built on frontline threat intelligence from our global incident response investigations across LevelBlue. This article is an excerpt […]

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Inside Vect Ransomware-as-a-Service

Inside Vect Ransomware-as-a-Service 2026-04-30 at 18:18 By Nathaniel Morales Vect ransomware, a new group that emerged in January 2026, has recently begun attracting attention in the cybersecurity space for its strategic partnerships, which are helping it expand. One notable collaboration is with TeamPCP, with evidence already surfacing as the latest victims on Vect’s leak site […]

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Crypto Drainers as a Converging Threat: Insights into Emerging Hybrid Attack Ecosystems

Crypto Drainers as a Converging Threat: Insights into Emerging Hybrid Attack Ecosystems 2026-04-23 at 17:11 By Serhii Melnyk, King Orande, Cris Tomboc, Sean Shirley LevelBlue SpiderLabs’ Cyber Threat Intelligence Team continues to observe a progressive convergence between traditional cybercrime activity and attacks targeting cryptocurrency users. This article is an excerpt from LevelBlue SpiderLabs Blog View […]

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A Closer Look at the Novel and Stealthy KarstoRAT Malware

A Closer Look at the Novel and Stealthy KarstoRAT Malware 2026-04-21 at 17:36 By Chen Aviani For almost three decades now, threat actors have used remote access trojans (RATs) to monitor user activity and steal sensitive information and credentials. The RAT’s surreptitious nature has cemented its spot in malicious actors’ malware arsenal, and over the […]

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Go With the Flow: Abusing OAuth Device Code Flow

Go With the Flow: Abusing OAuth Device Code Flow 2026-04-20 at 17:03 By Jakub Wiewiorski In early 2026, phishing attacks are still among the top contributors to the true positive detections in security operation centers (SOCs). Adversaries constantly come up with new ways of luring users into traps, concealing their actual intents and stacking anti-detection […]

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RedSun and the Expanding Risk Window: Why Microsoft Defender Patching Can’t Wait

RedSun and the Expanding Risk Window: Why Microsoft Defender Patching Can’t Wait 2026-04-17 at 21:02 By A newly disclosed zero-day vulnerability, dubbed RedSun, is raising fresh concerns for organizations relying on Microsoft Defender as a core layer of endpoint protection. Early indicators suggest similarities to the recently patched BlueHammer vulnerability (CVE-2026-33825), reinforcing a troubling trend: […]

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Beyond the Fence: Securing Our Skies from the Drone Threat

Beyond the Fence: Securing Our Skies from the Drone Threat 2026-04-14 at 17:02 By For decades, security leaders have optimized defenses in two dimensions. Doors, locks, fences, cameras, access badges, identity systems, and multi-factor authentication have all been designed to control who and what moves through physical and digital perimeters. This article is an excerpt […]

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Why Attackers Are Bypassing Phishing Emails and Targeting Identity Instead

Why Attackers Are Bypassing Phishing Emails and Targeting Identity Instead 2026-04-13 at 17:31 By Jamie Mamroe One of the fastest growing initial access techniques we are seeing right now is Okta vishing: voice-based social engineering designed to compromise the identity provider rather than the inbox. This article is an excerpt from LevelBlue SpiderLabs Blog View […]

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Trojanized CPUID HWMonitor Installer Delivers Fileless .NET Payload via Obfuscated IPv6 Scriptlet

Trojanized CPUID HWMonitor Installer Delivers Fileless .NET Payload via Obfuscated IPv6 Scriptlet 2026-04-11 at 02:20 By Sean Shirley Overview Recent reporting has identified a trojanized version of the CPUID HWMonitor installer being used to deliver a multi-stage, fileless malware chain leveraging trusted Windows binaries. Upon execution, the installer initiates a sequence involving PowerShell, MSBuild, and […]

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Axios NPM Package Supply Chain Compromise Leads to RAT Deployment

Axios NPM Package Supply Chain Compromise Leads to RAT Deployment 2026-04-09 at 23:38 By Mahadev Joshi and Sho Kishimoto KEY OBSERVATIONS Malicious Package Versions Identified: Malicious versions of the Axios npm package ([email protected] and [email protected]) were observed within a customer’s environment, indicating exposure to the supply chain compromise. Suspicious Dependency Execution: The presence of an […]

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Err-Hiding and Seek: How ErrTraffic v3 Leverages EtherHiding in ClickFix Campaign

Err-Hiding and Seek: How ErrTraffic v3 Leverages EtherHiding in ClickFix Campaign 2026-04-09 at 16:17 By King Orande and Cris Tomboc TLP: AMBER+STRICT The LevelBlue SpiderLabs team examined the latest version of ErrTraffic, which emerged in early 2026. In a recently observed campaign, the team found that ErrTraffic primarily targets WordPress websites by deploying a PHP backdoor script […]

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Major Supply Chain Compromise in the Popular axios npm Package

Major Supply Chain Compromise in the Popular axios npm Package 2026-04-03 at 17:52 By Karl Sigler On March 30, 2026, two malicious versions of the widely used axios HTTP client library were published to npm; [email protected] and [email protected]. The malicious versions inject a new dependency, [email protected], which, in turn, downloads a Remote Access Toolkit (RAT). […]

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Using RF Power Levels to Defeat MAC Address Randomization Enabling Passive Device Tracking

Using RF Power Levels to Defeat MAC Address Randomization Enabling Passive Device Tracking 2026-03-31 at 18:01 By Tom Neaves I came up with a theory (based on science) that it may be possible to passively track wireless devices even though they are making use of the defense that is MAC Address Randomization. This article is […]

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“Say My Name”: How MioLab is building MacOS Stealer Empire

“Say My Name”: How MioLab is building MacOS Stealer Empire 2026-03-20 at 21:16 By Mark Tsipershtein and Evgeny Ananin As Apple computer’s market share continues to grow, threat actors are increasingly shifting their focus toward MacOS environments. Today, surging enterprise adoption and a user base of high-value targets, such as software engineers, executives, and cryptocurrency […]

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Fake CAPTCHA Campaign: Inside a Multi-Stage Stealer Assault

Fake CAPTCHA Campaign: Inside a Multi-Stage Stealer Assault 2026-03-19 at 22:28 By Shabtay Barel, Serhii Melnyk, Rodel Mendrez This report expands LevelBlue’s ongoing investigation into a multi-stage fileless malware campaign in which a network of compromised legitimate websites redirects victims to fake CAPTCHA verification pages delivering credential-stealing payloads through a ClickFix social engineering mechanism. This […]

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