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Hidden VMs: how hackers leverage QEMU to stealthily steal data and spread malware

Attackers abuse QEMU to hide malware in virtual machines, bypass detection, steal data, and deploy ransomware without leaving any trace. Sophos researchers report a rise in attackers abusing QEMU, an open-source emulator, to hide malicious activity inside virtual machines. By running malware in a VM, attackers avoid endpoint security controls and leave minimal traces on…

Nexcorium Mirai variant exploits TBK DVR flaw to launch DDoS attacks

A Mirai variant called Nexcorium exploits a flaw in TBK DVRs to infect devices and use them in DDoS attacks, along with outdated TP-Link routers. Fortinet researchers found that threat actors are exploiting vulnerabilities in TBK DVRs and end-of-life TP-Link routers to spread a Mirai variant called Nexcorium. “IoT devices are increasingly prime targets for…

Crypto Critic Maxine Waters’s New Primary Foe Got Over Two-Thirds of Money From Crypto

Rep. Maxine Waters, D-Calif., is the scourge of cryptocurrencies on Capitol Hill, burnishing her bona fides by supporting tighter oversight from her perch as ranking member of the House Financial Services Committee. If Democrats win the midterm elections, Waters is poised to become the chair of the influential committee. Crypto donors are trying to make…

Microsoft Defender under attack as three zero-days, two of them still unpatched, enable elevated access

Attackers exploit three Microsoft Defender zero-days, code-named BlueHammer, RedSun, and UnDefend, to gain elevated access. Attackers are exploiting three recently disclosed zero-day flaws in Microsoft Defender to gain higher privileges on compromised systems. The vulnerabilities, called BlueHammer, RedSun, and UnDefend, were revealed by a researcher known as Chaotic Eclipse after criticizing Microsoft’s handling of the…

Mirai Variant Nexcorium Exploits CVE-2024-3721 to Hijack TBK DVRs for DDoS Botnet

Threat actors are exploiting security flaws in TBK DVR and end‑of‑life (EoL) TP-Link Wi-Fi routers to deploy Mirai-botnet variants on compromised devices, according to findings from Fortinet FortiGuard Labs and Palo Alto Networks Unit 42. The attack targeting TBK DVR devices has been found to exploit CVE-2024-3721 (CVSS score: 6.3), a medium-severity command injection vulnerability…

Critical sandbox bypass fixed in popular Thymeleaf Java template engine

Maintainers of Thymeleaf, a widely used template engine for Java web applications, fixed a rare critical vulnerability that allows unauthenticated attackers to execute malicious code on servers. The vulnerability, tracked as CVE-2026-40478, is rated 9.1 on the CVSS severity scale and is described as a Server-Side Template Injection (SSTI) issue. Thymeleaf has a sandbox-like protection…

World ID expands its ‘proof of human’ vision for the AI era

Identity management is a critical concern for any enterprise, and it’s becoming ever more complex and convoluted with the advent of AI agents. World ID is taking a unique (and to some, controversial) approach to this challenge by building a ‘digital proof of human’ ecosystem for the internet. Today, at its “Lift Off” event, the…

Flawed Cisco update threatens to stop APs from getting further patches

Cisco admins are scrambling to patch a critical flash memory overflow vulnerability in over 200 Cisco Systems IOS XE-based models of wireless access points (APs), caused by a recent flawed software update. If the issue is not corrected quickly, the AP’s memory will become so flooded that new software updates will be blocked and the…

Kyrgyzstan-based crypto exchange Grinex shuts down after $13.7M cyber heist, blames Western Intelligence

Grinex halted operations after a $13.7M hack, blaming Western intelligence. Stolen funds came from wallets of Russian users on the platform. Kyrgyz crypto exchange Grinex halted operations after a threat actor stole $13.7 million in a cyber attack that the company attributes to Western intelligence agencies. The stolen funds belonged to Russian users, as the…

Microsoft’s Patch Tuesday release for April is a whopper

Windows admins are going to be busy this month, dealing with the largest Patch Tuesday cycle we can recall. The April release involves 165 updates and roughly 340 unique CVEs from Microsoft — including two zero-days, one of which is already being actively exploited in the wild.  The Readiness team is recommending “Patch Now” schedules…

The surveillance law Congress can’t quit — and can’t explain

Congress is grappling with renewal of a surveillance law set to expire at the end of this month that critics say is a mystery on how much of a difference it has made for controversial government spying authorities — for better or worse. The 2024 law reauthorized so-called Section 702 powers of the Foreign Intelligence…

Transform security logs into OCSF format using a configuration-driven ETL solution

Security logs capture essential security-related activities, such as user sign-ins, file access, network traffic, and application usage. These logs are important for monitoring, detecting, and responding to potential security events. The Open Cybersecurity Schema Framework (OCSF) addresses this challenge by providing a standardized format to represent security events, ensuring consistent and efficient data handling across…

Critical Exploits, AI Shifts, and Major Breaches Redefine Cybersecurity This Week

Major Threats & Vulnerabilities Zero-Day and Active Exploits A critical flaw in Nginx UI is being actively exploited in the wild, allowing unauthenticated users to perform privileged actions through an unprotected endpoint. Administrators are urged to patch immediately and restrict public access to management interfaces. The EngageLab SDK vulnerability affecting over 50 million Android users…

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Operation PowerOFF: 53 DDoS domains seized and 3 Million criminal accounts uncovered

Operation PowerOFF shut down 53 DDoS-for-hire domains, arrested four suspects, and exposed data on over 3 million criminal user accounts. Operation PowerOFF is an international law enforcement action that dismantled 53 domains linked to DDoS-for-hire services used by over 75,000 cybercriminals. Authorities arrested four suspects, seized infrastructure, and gained access to databases containing more than…

Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched

Huntress is warning that threat actors are exploiting three recently disclosed security flaws in Microsoft Defender to gain elevated privileges in compromised systems. The activity involves the exploitation of three vulnerabilities that are codenamed BlueHammer (requires GitHub sign-in), RedSun, and UnDefend, all of which were released as zero-days by a researcher known as Chaotic Eclipse (

White House moves to give federal agencies access to Anthropic’s Claude Mythos

The US government is preparing to authorize a version of Anthropic’s Claude Mythos model for use by major US federal agencies, amid concerns that the AI model could rapidly spot cybersecurity vulnerabilities and offer the ability to exploit them. Federal Chief Information Officer Gregory Barbaccia at the White House Office of Management and Budget (OMB)…

Another Microsoft Defender privilege escalation bug emerges days after patch

Days after Microsoft patched a high-severity issue affecting its Windows Defender antivirus tool through April’s Patch Tuesday, researchers warn of another vulnerability that could enable SYSTEM privileges through local escalation. In a newly disclosed proof-of-concept (PoC) exploit, dubbed “RedSun,” GitHub user going by the name “Nightmare Eclipse” demonstrated how Microsoft Defender’s handling of certain cloud-tagged…

How Addressing Cloud Misconfigurations Disrupts the Cyber Kill Chain

In this post, I will show you how addressing cloud misconfigurations disrupts the cyber kill chain. Cloud environments offer speed and flexibility, but they introduce new risks. One common issue is misconfiguration. Small mistakes, such as overly broad access permissions or publicly exposed resources, can open the door to attackers. These gaps sometimes go unnoticed…

Researcher drops two more Microsoft Defender zero-days, all three now exploited in the wild

The security researcher who earlier this month published a proof-of-concept (PoC) exploit for a zero-day privilege escalation vulnerability in Microsoft Defender is back with two more. The first, dubbed “RedSun,” is another privilege escalation flaw in the same platform. The second, “UnDefend,” allows a standard user to block Microsoft Defender from receiving signature updates or…

Palo Alto’s Helmut Reisinger sees a cyber sea change ahead as AI advances

In two decades, Palo Alto Networks has evolved from a next-generation niche player to one of the largest global cybersecurity giants today. Under its mantra of “platformization,” the company has catapulted its revenues over its closest competitors and boosted its stock valuation to over $130 billion. No stranger to AI use in cybersecurity, Palo Alto recently announced…

GitLab 18.11 brings agentic AI to security fixes, CI pipelines, and delivery analytics

GitLab has released GitLab 18.11, expanding agentic AI across the entire software lifecycle with security remediation, pipeline configuration, and delivery analytics. AI-generated code moves faster than the systems around it can keep up with, creating the AI paradox: faster code generation without faster delivery, security, or operations to match. As code volume grows, so does…

Liongard upgrades LiongardIQ with AI access, live asset data, and deeper discovery

Liongard has announced the expansion of LiongardIQ with new capabilities spanning programmatic AI integration, conversational querying, enhanced network discovery, and deeper identity mapping, extending its system of authority for asset intelligence across the full IT stack. Without a trusted foundation of asset intelligence, automation runs on assumptions, AI agents query stale data, and security gaps…

Inside ZionSiphon: politically driven malware aims at Israeli water systems

New ZionSiphon malware targets water systems, and allows attackers to alter pressure and chlorine levels. A flaw makes it ineffective for now. Darktrace analyzed ZionSiphon, a new malware designed to target water treatment and desalination systems, which aims to disrupt operations by altering hydraulic pressure and increasing chlorine levels to unsafe levels. The malware combines…

Mozilla challenges enterprise AI providers with Thunderbolt, open-source AI client under your control

For organizations that want to keep company data within their own systems and have more control over how AI is deployed, Mozilla is offering an alternative to externally hosted AI services with Thunderbolt, an open-source AI client designed for self-hosted use. Thunderbolt is available through a waitlist, with native applications for web, macOS, Windows, Linux,…

U.S. CISA adds a flaw in Apache ActiveMQ to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in Apache ActiveMQ to its Known Exploited Vulnerabilities catalog The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in Apache ActiveMQ, tracked as CVE-2026-34197 (CVSS score of 8.8), to its Known Exploited Vulnerabilities (KEV) catalog. CVE-2026-34197 is a critical flaw in Apache ActiveMQ caused by…

NIST Limits CVE Enrichment After 263% Surge in Vulnerability Submissions

The National Institute of Standards and Technology (NIST) has announced changes to the way it handles cybersecurity vulnerabilities and exposures (CVEs) listed in its National Vulnerability Database (NVD), stating it will only enrich those that fulfil certain conditions owing to an explosion in CVE submissions. “CVEs that do not meet those criteria will still be…

Operation PowerOFF Seizes 53 DDoS Domains, Exposes 3 Million Criminal Accounts

An international law enforcement operation has taken down 53 domains and arrested four people in connection with commercial distributed denial-of-service (DDoS) operations that were used by more than 75,000 cybercriminals. The ongoing effort, dubbed Operation PowerOFF, disrupted access to the DDoS-for-hire services, took down the technical infrastructure supporting them, and obtained access to

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Social media bans might steer kids into riskier corners of the internet

Governments are moving to block children under 16 from social media in the name of safety. But once these measures move from policy to practice, they raise a harder question: what happens when protecting kids requires collecting more data than ever before and may put them at greater risk? Age checks spark debate over privacy…

Apache ActiveMQ CVE-2026-34197 Added to CISA KEV Amid Active Exploitation

A recently disclosed high-severity security flaw in Apache ActiveMQ Classic has come under active exploitation in the wild, per the U.S. Cybersecurity and Infrastructure Security Agency (CISA). To that end, the agency has added the vulnerability, tracked as CVE-2026-34197 (CVSS score: 8.8), to its Known Exploited Vulnerabilities (KEV) catalog, requiring Federal Civilian

Anthropic’s latest model is deliberately less powerful than Mythos (and that’s the point)

Anthropic has today released a new, improved Claude model, Opus 4.7, but has deliberately built it to be less capable than the highly-anticipated Claude Mythos. Anthropic calls Opus 4.7 a “notable improvement” over Opus 4.6, offering advanced software engineering capabilities and improved visioning, memory, instruction-following, and financial analysis. However, the yet-to-be-released (and inadvertently leaked) Mythos…

Google should share search data to break its monopoly, European Commission suggests

The European Commission this week requested, but did not order Google to allow third party search engines in Europe access to its search data as a means to comply with the Digital Markets Act (DMA), legislation the Commission describes as a law designed to “make the markets in the digital sector fairer and more contestable.” Google…

Lumma Stealer infection with Sectop RAT (ArechClient2), (Fri, Apr 17th)

Introduction This diary provides indicators from a Lumma Stealer infection that was followed by Sectop RAT (ArechClient2). I searched for cracked versions of popular copyright-protected software, and I downloaded the initial malware after following the results of one such search. This is a common distribution technique for various families of malware, and I often find…

Here’s What Agentic AI Can Do With Have I Been Pwned’s APIs

I love cutting-edge tech, but I hate hyperbole, so I find AI to be a real paradox. Somewhere in that whole mess of overnight influencers, disinformation and ludicrous claims is some real “gold” – AI stuff that’s genuinely useful and makes a meaningful difference. This blog post cuts straight to the good stuff, specifically how…

US nationals sentenced for aiding North Korea’s tech worker scheme

Two New Jersey men were sentenced Wednesday for facilitating North Korea’s long-running scheme to plant operatives inside U.S. businesses as employees, generating more than $5 million in illicit revenue for the regime, the Justice Department said.  The U.S. nationals — Kejia Wang, also known as Tony Wang, and Zhenxing Wang, also known as Danny Wang…

Cisco Systems issues three advisories for critical vulnerabilities in Webex, ISE

Admins who use Cisco Webex Services configured to use trust anchors within the SSO integration with Control Hub must install a new identity provider certificate to close a critical vulnerability, or risk losing access control. Cisco said in an advisory this week that admins must upload a new identity provider (IdP) SAML certificate to Webex…

Cisco Systems issues three advisories for critical vulnerabilities in Webex, ISE

Admins who use Cisco Webex Services configured to use trust anchors within the SSO integration with Control Hub must install a new identity provider certificate to close a critical vulnerability, or risk losing access control. Cisco said in an advisory this week that admins must upload a new identity provider (IdP) SAML certificate to Webex…

RCE by design: MCP architectural choice haunts AI agent ecosystem

AI agent building tools enable users to configure Model Context Protocol (MCP) servers may be exposing systems to remote code execution due to an architectural decision in Anthropic’s reference implementation. At issue are unsafe defaults in how MCP configuration works over the STDIO interface, with broad implications for the agent ecosystem, according to a new…

ImmuniWeb brings AI upgrades, post-quantum detection and more in Q1 2026

ImmuniWeb unveiled technical updates, new features and functionalities across all products available on the ImmuniWeb AI Platform. ImmuniWeb Discovery Launch of a dedicated Cyber Threat Intelligence (CTI) dashboard Advanced detection of exposed AI-related assets, services and software Enhanced detection of phishing websites thanks to finetuning of our AI models Better and faster detection of IoC…

NIST cuts down CVE analysis amid vulnerability overload

Overwhelmed by an escalating volume of security flaws, the National Institute of Standards and Technology (NIST) has announced significant changes to how it handles cybersecurity vulnerabilities and exposures (CVEs). Rather than commit to providing enrichment for all entries in its National Vulnerability Database (NVD), the agency will focus on just the most critical CVEs, which…

Cisco fixed four critical flaws in Identity Services and Webex

Cisco fixed four critical flaws in Identity Services and Webex that could allow code execution and user impersonation. Cisco has addressed four critical vulnerabilities affecting its Identity Services and Webex platforms. The flaws could allow attackers to execute arbitrary code and impersonate any user within the affected services. The issues pose serious security risks, prompting…

Cookeville Regional Medical Center hospital data breach impacts 337,917 people

A ransomware attack on Cookeville Regional Medical Center hospital (Tennessee) exposed data of 337,000 people after hackers stole 500GB of sensitive information from its systems. A ransomware attack on Cookeville Regional Medical Center (CRMC) in Tennessee led to a major data breach affecting about 337,000 people. The attack, carried out by the Rhysida group, involved…

Newly Discovered PowMix Botnet Hits Czech Workers Using Randomized C2 Traffic

Cybersecurity researchers have warned of an active malicious campaign that’s targeting the workforce in the Czech Republic with a previously undocumented botnet dubbed PowMix since at least December 2025. “PowMix employs randomized command-and-control (C2) beaconing intervals, rather than persistent connection to the C2 server, to evade the network signature detections,” Cisco Talos