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 decades-old "finger" command is making a comeback,, with threat actors using the protocol to retrieve remote commands to execute on Windows devices. [...]
The botnet malware known as RondoDox has been observed targeting unpatched XWiki instances against a critical security flaw that could allow attackers to achieve arbitrary code execution
A public dataset and platform-agnostic analysis tool aim to help organizations in the fight against Apple-targeted malware, which researchers say has lacked proper attention.
The North Korean threat actors behind the Contagious Interview campaign have once again tweaked their tactics by using JSON storage services to stage malicious payloads
Amazon spilled the TEA Yet another supply chain attack has hit the npm registry in what Amazon describes as "one of the largest package flooding incidents in open source registry history" - but with a twist. Instead of injecting credential-stealing code or ransomware into the packages, this one is a token farming campaign.…
Rhadamanthys, VenomRAT and Elysium Targeted in OperationA multinational law enforcement operation resulted in the arrest of a remote access Trojan operator and the seizure of over 1,000 info stealer and botnet servers. Authorities took down 1,025 servers associated with the Rhadamanthys infostealer, the Venom RAT and a botnet dubbed Elysium.
The ImunifyAV malware scanner for Linux server, used by tens of millions of websites, is vulnerable to a remote code execution vulnerability that could be exploited to compromise the hosting environment. [...]
South America's largest country is notorious for banking malware attacks; Maverick self-terminates if its targeted user is based outside Brazil.
Uhale Android-based digital picture frames come with multiple critical security vulnerabilities and some of them download and execute malware at boot time. [...]
A global law enforcement operation has taken down the Rhadamanthys infostealer, VenomRAT trojan and the Elysium botnet
Operation Endgame also takes down Elysium and VenomRAT infrastructure International cops have pulled apart the Rhadamanthys infostealer operation, seizing 1,025 servers tied to the malware in coordinated raids between November 10-13.…
Malware families like Rhadamanthys Stealer, Venom RAT, and the Elysium botnet have been disrupted as part of a coordinated law enforcement operation led by Europol and Eurojust
Law enforcement authorities from 9 countries have taken down 1,025 servers used by the Rhadamanthys infolstealer, VenomRAT, and Elysium botnet malware operations in the latest phase of Operation Endgame, an international action targeting cybercrime. [...]
Vendors (still) keep mum An "advanced" attacker exploited CitrixBleed 2 and a max-severity Cisco Identity Services Engine (ISE) bug as zero-days to deploy custom malware, according to Amazon Chief Information Security Officer CJ Moses.…
The DanaBot malware has returned with a new version observed in attacks, six-months after law enforcement's Operation Endgame disrupted its activity in May. [...]
Amazon's threat intelligence team on Wednesday disclosed that it observed an advanced threat actor exploiting two then-zero-day security flaws in Cisco Identity Service Engine (ISE) and Citrix NetScaler ADC products as part of attacks designed to deliver custom malware
An advanced threat actor exploited the critical vulnerabilities "Citrix Bleed 2" (CVE-2025-5777) in NetScaler ADC and Gateway, and CVE-2025-20337 affecting Cisco Identity Service Engine (ISE) as zero-days to deploy custom malware. [...]
The Rhadamanthys infostealer operation has been disrupted, with numerous "customers" of the malware-as-a-service reporting that they no longer have access to their servers. [...]
Threat hunters have uncovered similarities between a banking malware called Coyote and a newly disclosed malicious program dubbed Maverick that has been propagated via WhatsApp
The malware known as GootLoader has resurfaced yet again after a brief spike in activity earlier this March, according to new findings from Huntress