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.
Threat hunters have discerned new activity associated with an Iranian threat actor known as Infy (aka Prince of Persia), nearly five years after the hacking group was observed targeting victims in Sweden, the Netherlands, and Turkey
The U.S. Department of Justice (DoJ) this week announced the indictment of 54 individuals in connection with a multi-million dollar ATM jackpotting scheme
Latest charges join the mountain of indictments facing alleged Tren de Aragua members A Venezuelan gang described by US officials as "a ruthless terrorist organization" faces charges over alleged deployment of malware on ATMs across the country, illegally siphoning millions of dollars.…
Cybersecurity researchers have disclosed details of a new campaign that has used cracked software distribution sites as a distribution vector for a new version of a modular and stealthy loader known as CountLoader
A previously undocumented China-aligned threat cluster dubbed LongNosedGoblin has been attributed to a series of cyber attacks targeting governmental entities in Southeast Asia and Japan
French authorities arrested two crew members of an Italian passenger ferry suspected of infecting the ship with malware that could have enabled them to remotely control the vessel. [...]
A new variant of the BeaverTail malware linked to North Korean hackers has been identified targeting cryptocurrency traders and developers
Security boffins warn flaw is now being used for ransomware attacks against live networks Microsoft says attackers have already compromised "several hundred machines across a diverse set of organizations" via the React2Shell flaw, using the access to execute code, deploy malware, and, in some cases, deliver ransomware.…
The North Korean threat actor known as Kimsuky has been linked to a new campaign that distributes a new variant of Android malware called DocSwap via QR codes hosted on phishing sites mimicking Seoul-based logistics firm CJ Logistics (formerly CJ Korea Express)
Experts Say AI Is Already Enabling Faster and Harder-to-Detect Attack CampaignsArtificial intelligence-fueled malware and automated cyber tools are enabling faster, more adaptive attacks at scale, with experts warning Congress that adversaries are now leveraging AI and quantum advances to outpace defenders and bypass outdated security architectures.
Ink Dragon Compromised IIS Networks to Relay ShadowPad MalwareA Chinese hacking group is using compromised European government networks as relay nodes to route commands and support other hacking operations. Security firm Check Point attributed the campaign to a Chinese espionage group it tracks as "Ink Dragon."
Also: macOS Naughty or Nice, Cybercrime Karma, Spoofing Legacy Rail InfrastructureLondon in December: Early to dark, quick to rain but also festive - and a mecca for cybersecurity researchers there for the annual Black Hat Europe conference. This year's event featured nearly 50 briefings that touched on everything from hardware hacking to combing infostealer logs for hidden gems.
A ransomware gang exploited the critical React2Shell vulnerability (CVE-2025-55182) to gain initial access to corporate networks and deployed the file-encrypting malware less than a minute later. [...]
The threat actor known as Jewelbug has been increasingly focusing on government targets in Europe since July 2025, even as it continues to attack entities located in Southeast Asia and South America
A new campaign named GhostPoster has leveraged logo files associated with 17 Mozilla Firefox browser add-ons to embed malicious JavaScript code designed to hijack affiliate links, inject tracking code, and commit click and ad fraud
A new Android malware-as-a-service (MaaS) named Cellik is being advertised on underground cybercrime forums offering a robust set of capabilities that include the option to embed it in any app available on the Google Play Store. [...]
Direct navigation -- the act of visiting a website by manually typing a domain name in a web browser -- has never been riskier: A new study finds the vast majority of "parked" domains -- mostly expired or dormant domain names, or common misspellings of popular websites -- are now configured to redirect visitors to sites that foist scams and malware.
The security vulnerability known as React2Shell is being exploited by threat actors to deliver malware families like KSwapDoor and ZnDoor, according to findings from Palo Alto Networks Unit 42 and NTT Security
A new malware-as-a-service (MaaS) information stealer named SantaStealer is being advertised on Telegram and hacker forums as operating in memory to avoid file-based detection. [...]
2 More Vulnerabilities Need Patching in React Server Components, Warns VercelMass exploitation of the "React2Shell" - CVE-2025-55182 - vulnerability remains underway by nation-state hackers tied to China, North Korea and Iran, as well as financially motivated cybercriminals running everything from cryptomining malware to DDoS services, security experts warn.