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 clever malware deployment scheme first spotted in targeted attacks last year has now gone mainstream. In this scam, dubbed "ClickFix," the visitor to a hacked or malicious website is asked to distinguish themselves from bots by pressing a combination of keyboard keys that causes Microsoft Windows to download password-stealing malware.
DeepSeek Comes Very Close to Producing a Keylogger and RansomwareSecurity researchers used the Chinese DeepSeek-R1 artificial intelligence reasoning model to come close to developing ransomware variants and keyloggers with evasion capabilities. The model needs prompt engineering and its output requires code editing.
Users searching for pirated software are the target of a new malware campaign that delivers a previously undocumented clipper malware called MassJacker, according to findings from CyberArk
A new malware campaign has been observed leveraging social engineering tactics to deliver an open-source rootkit called r77
Researchers discovered an attack chain that uses several layers of obfuscated batch files and PowerShell scripts to deliver an advanced and persistent rootkit.
Also: Hackers Use npm Packages, MassJacker Malware and Fake $TrumpThis week, Garantex admin arrested, hackers used npm packages to steal crypto data and deployed MassJacker malware to steal coins, infected victims with $Trump lures. Also, U.S. authorities seized hacked Ripple funds and a California warning about scams.
Microsoft has shed light on an ongoing phishing campaign that targeted the hospitality sector by impersonating online travel agency Booking.com using an increasingly popular social engineering technique called ClickFix to deliver credential-stealing malware
Phishers check in, your credentials check out, Microsoft warns An ongoing phishing campaign disguised as a Booking.com email casts keystroke and credential-stealing malware into hospitality employees' inboxes for financial fraud and theft, according to Microsoft Threat Intelligence.…
Microsoft said the ongoing phishing campaign is designed to infect hospitality firms with multiple credential-stealing malware
Microsoft is warning that an ongoing phishing campaign impersonating Booking.com is using ClickFix social engineering attacks to infect hospitality workers with various malware, including infostealers and RATs. [...]
The North Korea-linked threat actor known as ScarCruft is said to have been behind a never-before-seen Android surveillance tool named KoSpy targeting Korean and English-speaking users
Credential theft surged 3× in a year—but AI-powered malware? More hype than reality. The Red Report 2025 by Picus Labs reveals attackers still rely on proven tactics like stealth & automation to execute the "perfect heist." [...]
It might need polishing, but a useful find for any budding cybercrooks out there DeepSeek's flagship R1 model is capable of generating a working keylogger and basic ransomware code, just as long as a techie is on hand to tinker with it a little.…
Feds warn gang still rampant and now cracked 300+ victims around the world A crook who distributes the Medusa ransomware tried to make a victim cough up three payments instead of the usual two, according to a government advisory on how to defend against the malware and the gangs who wield it.…
Browser Isolation Protects Access Points as Remote Work Expands Attack SurfaceWith 92% of organizations supporting remote connectivity and phishing attacks surging to record levels, browser-based security has become essential for zero trust frameworks to protect against malware, ransomware and credential theft.
In the past, the vulnerability was exploited to drop Mirai botnet malware. Today, it's being used once more for another botnet campaign with its own malware.
Juniper Networks Urges Immediate Updating and Malware Scans to Block AttackersHackers have been infecting outdated Juniper MX routers with backdoor malware as part of an apparent cyberespionage campaign that traces to a Chinese-affiliated hacking team tracked as UNC 3886, warned Google's Mandiant incident response group.
Mandiant revealed that Chinese espionage actor UNC3886 has deployed modified versions of the TinyShell backdoor across multiple Juniper OS routers
A newly discovered clipboard hijacking operation dubbed 'MassJacker' uses at least 778,531 cryptocurrency wallet addresses to steal digital assets from compromised computers. [...]
Experts Express Surprise Over Major Social Platform Falling Victim to DDoS AttacksOne of the world's biggest social networks continued to face intermittent outages Tuesday, apparently due to unsophisticated, distributed denial-of-service attacks. Experts said the attacks were traced to malware-infected devices - many based in the U.S. - and pro-Palestinian hacktivists.