The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
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Background for this topic.
Malware is software intentionally created or modified to perform unauthorized or harmful actions on a computer, device, or network. The term covers distinct families and functions, including viruses, worms, trojans, spyware, botnet clients, and ransomware; a single sample may combine several capabilities. Its behavior—not its label—determines the security concern: it may execute code, persist, alter or encrypt data, steal credentials, or provide unauthorized remote access.
For practitioners, malware reporting is most useful when it identifies the family or tool conservatively and provides evidence such as affected platforms, samples, infrastructure, or observed behavior. Defenses include promptly patching vulnerable software, restricting execution and privileges, monitoring endpoints and networks, maintaining tested backups, and isolating suspected systems for analysis. Detection should use behavior and verified indicators rather than names alone, since variants change. If malware processes personal or regulated data, investigations should also address privacy, evidence preservation, and applicable reporting obligations.
A Chinese APT is going where most APTs don't: deep into the cloud, compromising supply chains and deploying uncommon malware.
The Pakistani APT36 cyberspies are using Linux .desktop files to load malware in new attacks against government and defense entities in India. [...]
A new infostealer malware targeting Mac devices, called 'Shamos,' is targeting Mac devices in ClickFix attacks that impersonate troubleshooting guides and fixes. [...]
ClickFix tricks Microsoft's security team has published an in-depth report into ClickFix, the social engineering attack which tricks users into executing malicious commands in the guise of proving their humanity.…
Cybersecurity researchers have shed light on a novel attack chain that employs phishing emails to deliver an open-source backdoor called VShell
A 55-year-old Chinese national has been sentenced to four years in prison and three years of supervised release for sabotaging his former employer's network with custom malware and deploying a kill switch that locked out employees when his account was disabled
Pro tip: When taking revenge, don't use your real name A US court sentenced a former developer at power management biz Eaton to four years in prison after he installed malware on the company’s servers.…
A software developer has been sentenced to four years in prison for sabotaging his ex-employer's Windows network with custom malware and a kill switch that locked out employees when his account was disabled. [...]
CEO Amir Ben-Efraim: Acquisition Adds AI-Powered File Sanitization to Browser ToolsThrough its acquisition of Votiro, Menlo Security has embedded file-level sanitization and AI-powered detection directly into its enterprise browser stack. CEO Amir Ben-Efraim says the move helps prevent malware, data leaks and phishing risks at the browser level.
Cybersecurity researchers have disclosed details of a new malware loader called QuirkyLoader that's being used to deliver via email spam campaigns an array of next-stage payloads ranging from information stealers to remote access trojans since November 2024
Cybercriminals are increasingly abusing the AI-powered Lovable website creation and hosting platform to generate phishing pages, malware-dropping portals, and various fraudulent websites. [...]
The U.S. Department of Justice (DoJ) announced charges against the alleged developer and administrator of the "Rapper Bot" DDoS-for-hire botnet. [...]
Threat actors are exploiting a nearly two-year-old security flaw in Apache ActiveMQ to gain persistent access to cloud Linux systems and deploy malware called DripDropper
Attackers are wielding the sophisticated modular malware while exploiting CVE-2025-29824, a previously zero-day flaw in Windows Common Log File System (CLFS) that allows attackers to gain system-level privileges on compromised systems.
An attacker is breaking into Linux systems via a widely abused 2-year-old vulnerability in Apache ActiveMQ, installing malware and then patching the flaw.
A state-sponsored espionage campaign is targeting foreign embassies in South Korea to deploy XenoRAT malware from malicious GitHub repositories. [...]
PolarNet Has Hallmarks of an Operational Relay BoxNearly 40,000 enterprise-grade devices and consumer-class routers, IP cameras and more are infected with malware researchers codenamed PolarEdge, controlled by a botnet of the same name, which experts suspect is designed to hide traffic tied to cyberespionage operations.
The threat actors behind the Noodlophile malware are leveraging spear-phishing emails and updated delivery mechanisms to deploy the information stealer in attacks aimed at enterprises located in the U.S., Europe, Baltic countries, and the Asia-Pacific (APAC) region
The source code for version 3 of the ERMAC Android banking trojan has been leaked online, exposing the internals of the malware-as-a-service platform and the operator's infrastructure. [...]
Cybersecurity researchers have lifted the lid on the threat actors' exploitation of a now-patched security flaw in Microsoft Windows to deploy the PipeMagic malware in RansomExx ransomware attacks