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 new ATM malware strain dubbed FiXS has been observed targeting Mexican banks since the start of February 2023
The China-aligned Mustang Panda actor has been observed using a hitherto unseen custom backdoor called MQsTTang as part of an ongoing social engineering campaign that commenced in January 2023
A malicious Python package uploaded to the Python Package Index (PyPI) has been found to contain a fully-featured information stealer and remote access trojan
The threat actor known as Lucky Mouse has developed a Linux version of a malware toolkit called SysUpdate, expanding on its ability to target devices running the operating system
Six different law firms were targeted in January and February 2023 as part of two disparate threat campaigns distributing GootLoader and FakeUpdates (aka SocGholish) malware strains
A stealthy Unified Extensible Firmware Interface (UEFI) bootkit called BlackLotus has become the first publicly known malware capable of bypassing Secure Boot, making it a potent threat in the cyber landscape
Cryptocurrency companies are being targeted as part of a new campaign that delivers a remote access trojan called Parallax RAT
The RIG exploit kit (EK) touched an all-time high successful exploitation rate of nearly 30% in 2022, new findings reveal
A new ChromeLoader malware campaign has been observed being distributed via virtual hard disk (VHD) files, marking a deviation from the ISO optical disc image format
Government entities in Asia-Pacific and North America are being targeted by an unknown threat actor with an off-the-shelf malware downloader known as PureCrypter to deliver an array of information stealers and ransomware