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.
The Russian state-sponsored threat actor known as APT29 has been linked to an advanced phishing campaign that's targeting diplomatic entities across Europe with a new variant of WINELOADER and a previously unreported malware loader codenamed GRAPELOADER
A new malware-as-a-service (MaaS) platform named 'SuperCard X' has emerged, targeting Android devices via NFC relay attacks that enable point-of-sale and ATM transactions using compromised payment card data. [...]
The Interlock ransomware gang now uses ClickFix attacks that impersonate IT tools to breach corporate networks and deploy file-encrypting malware on devices. [...]
Chinese-speaking IronHusky hackers are targeting Russian and Mongolian government organizations using upgraded MysterySnail remote access trojan (RAT) malware. [...]
A new multi-stage attack has been observed delivering malware families like Agent Tesla variants, Remcos RAT, and XLoader
Russian state actor Midnight Blizzard is using fake wine tasting events as a lure to spread malware for espionage purposes, according to Check Point
Cybersecurity researchers are warning of continued risks posed by a distributed denial-of-service (DDoS) malware known as XorDDoS, with 71.3 percent of the attacks between November 2023 and February 2025 targeting the United States
The China-linked threat actor known as Mustang Panda has been attributed to a cyber attack targeting an unspecified organization in Myanmar with previously unreported tooling, highlighting continued effort by the threat actors to increase the sophistication and effectiveness of their malware
Multiple state-sponsored hacking groups from Iran, North Korea, and Russia have been found leveraging the increasingly popular ClickFix social engineering tactic to deploy malware over a three-month period from late 2024 through the beginning of 2025
Microsoft is calling attention to an ongoing malvertising campaign that makes use of Node.js to deliver malicious payloads capable of information theft and data exfiltration
Researchers discovered new variants of the malware, which is tied to a China-nexus threat group, targeting Windows environments of critical infrastructure networks in Europe.
The threat actors lace pre-downloaded applications with malware to steal cryptocurrency by covertly swapping users' wallet addresses with their own.
Vintage phishing varietal has improved with age Russia never stops using proven tactics, and its Cozy Bear, aka APT 29, cyber-spies are once again trying to lure European diplomats into downloading malware with a phony invitation to a lux event.…
Cheap Android smartphones manufactured by Chinese companies have been observed pre-installed with trojanized apps masquerading as WhatsApp and Telegram that contain cryptocurrency clipper functionality as part of a campaign since June 2024
Malware Hides in Memory, Evades Detection by Endpoint ToolsA Chinese state-backed hacking group tracked as UNC5174 relaunched its operations after a year of silence with a campaign using a memory-only remote access Trojan that evades traditional detection mechanisms, according to new research from cybersecurity firm Sysdig.
Threat Actors Deploy Obfuscation Tactics to Targets Windows MachinesLikely Chinese nation-state hackers are targeting European companies using previously unseen malware backdoor variants with advanced network tunneling and evasion capabilities for data theft. Brussels-based security firm Nviso links the campaign to a threat actor tracked as UNC5221.
Russian state-sponsored espionage group Midnight Blizzard is behind a new spear-phishing campaign targeting diplomatic entities in Europe, including embassies. [...]
Posing as potential employers, Slow Pisces hackers conceal malware in coding challenges sent to cryptocurrency developers on LinkedIn
The China-linked threat actor known as UNC5174 has been attributed to a new campaign that leverages a variant of a known malware dubbed SNOWLIGHT and a new open-source tool called VShell to infect Linux systems
The North Korea-linked threat actor assessed to be behind the massive Bybit hack in February 2025 has been linked to a malicious campaign that targets developers to deliver new stealer malware under the guise of a coding assignment