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.
For at least half a year, the official software supplied with Procolored printers included malware in the form of a remote access trojan and a cryptocurrency stealer. [...]
Ransomware gang members increasingly use a new malware called Skitnet ("Bossnet") to perform stealthy post-exploitation activities on breached networks. [...]
Cybersecurity researchers are calling attention to a new botnet malware called HTTPBot that has been used to primarily single out the gaming industry, as well as technology companies and educational institutions in China
Cybersecurity researchers have shed light on a new malware campaign that makes use of a PowerShell-based shellcode loader to deploy a remote access trojan called Remcos RAT
Cybersecurity researchers have discovered a new phishing campaign that's being used to distribute malware called Horabot targeting Windows users in Latin American countries like Mexico, Guatemala, Colombia, Peru, Chile, and Argentina
Microsoft Researchers Link Turkish Spy Group to Output Messenger Zero-Day HackA Turkish-linked cyberespionage group known as Marbled Dust exploited a zero-day in the Output Messenger Server Manager application to spy on Kurdish military operations in Iraq. Microsoft reported the hack and called for immediate mitigation to block credential theft and malware delivery.
Cyber espionage campaign linked to North Korean actor TA406 targeted Ukrainian government entities
The North Korea-linked threat actor known as Konni APT has been attributed to a phishing campaign targeting government entities in Ukraine, indicating the threat actor's targeting beyond Russia
Threat actors are scamming users by advertising legitimate-looking generative AI websites that, when visited, install credential-stealing malware onto the victim's computer.
The cybercriminals infected older wireless Internet routers with Anyproxy and 5socks malware in order to reconfigure them — all without the users' knowledge.
What do a source code editor, a smart billboard, and a web server have in common? They’ve all become launchpads for attacks—because cybercriminals are rethinking what counts as “infrastructure.” Instead of chasing high-value targets directly, threat actors are now quietly taking over the overlooked: outdated software, unpatched IoT devices, and open-source packages. It's not just clever—it’s
Threat actors have been observed leveraging fake artificial intelligence (AI)-powered tools as a lure to entice users into downloading an information stealer malware dubbed Noodlophile
PLUS: Celsius scammer sent to slammer; Death-by-hacking victim warns you're never safe; and more Infosec in brief Good cybersecurity habits don't appear to qualify anyone to work at DOGE, as one Musk minion seemingly fell victim to infostealer malware.…
Malware Targets Western Officials, NGOs and JournalistsRussian cyber espionage hackers are using a new malware strain dubbed "Lostkeys" in a targeted espionage campaign aimed at Western officials, NGOs and journalists. Google researchers attribute Lostkeys to the threat group Coldriver, an operational unit within the Federal Security Service.
The website of iClicker, a popular student engagement platform, was compromised in a ClickFix attack that used a fake CAPTCHA prompt to trick students and instructors into installing malware on their devices. [...]