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 Russia-linked threat actor has been linked to a new campaign that employed a car for sale as a phishing lure to deliver a modular Windows backdoor called HeadLace
Cybersecurity researchers have discovered a previously undocumented Windows backdoor that leverages a built-in feature called Background Intelligent Transfer Service (BITS) as a command-and-control (C2) mechanism
Cybersecurity companies are warning about an uptick in the abuse of Clouflare's TryCloudflare free service for malware delivery
In yet another sign that threat actors are always looking out for new ways to trick users into downloading malware, it has come to light that the question-and-answer (Q&A) platform known as Stack Exchange has been abused to direct unsuspecting developers to bogus Python packages capable of draining their cryptocurrency wallets
Cybersecurity researchers have uncovered a new Android remote access trojan (RAT) called BingoMod that not only performs fraudulent money transfers from the compromised devices but also wipes them in an attempt to erase traces of the malware
How to detect and prevent attackers from using these various techniques Obfuscation is an important technique for protecting software that also carries risks, especially when used by malware authors. In this article, we examine obfuscation, its effects, and responses to it
Google has announced that it's adding a new layer of protection to its Chrome browser through what's called app-bound encryption to prevent information-stealing malware from grabbing cookies on Windows systems
The threat actors behind an ongoing malware campaign targeting software developers have demonstrated new malware and tactics, expanding their focus to include Windows, Linux, and macOS systems
Japanese organizations are the target of a Chinese nation-state threat actor that leverages malware families like LODEINFO and NOOPDOOR to harvest sensitive information from compromised hosts while stealthily remaining under the radar in some cases for a time period ranging from two to three years
A new malicious campaign has been observed making use of malicious Android apps to steal users' SMS messages since at least February 2022 as part of a large-scale campaign
Companies in Russia and Moldova have been the target of a phishing campaign orchestrated by a little-known cyber espionage group known as XDSpy
Cybersecurity researchers have detailed widespread phishing campaigns targeting small and medium-sized businesses (SMBs) in Poland during May 2024 that led to the deployment of several malware families like Agent Tesla, Formbook, and Remcos RAT
A recently patched security flaw impacting VMware ESXi hypervisors has been actively exploited by "several" ransomware groups to gain elevated permissions and deploy file-encrypting malware
A threat actor known as Stargazer Goblin has set up a network of inauthentic GitHub accounts to fuel a Distribution-as-a-Service (DaaS) that propagates a variety of information-stealing malware and netting them $100,000 in illicit profits over the past year
The remote access trojan known as Gh0st RAT has been observed being delivered by an "evasive dropper" called Gh0stGambit as part of a drive-by download scheme targeting Chinese-speaking Windows users