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
Crime-as-a-service vendors mix and match components as needed by client A malicious package discovered in the Python Package Index (PyPI) is the latest example of what threat hunters from Kroll called the continued "democratization of cybercrime," with the bad guys creating malware variants from the code of others.…
Malicious activity using a particular malware variant has been spotted since September 2022
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
The developers of the BlackLotus UEFI bootkit have improved the malware with Secure Boot bypass capabilities that allow it to infected even fully patched Windows 11 systems. [...]
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
The myth 'is now a reality' BlackLotus, a UEFI bootkit that's sold on hacking forums for about $5,000, can now bypass Secure Boot, making it the first known malware to run on Windows systems even with the firmware security feature enabled.…
An infamous Chinese cyber-hacking team has extended its SysUpdate malware framework to target Linux systems.
The APT27 hacking group, aka "Iron Tiger," has prepared a new Linux version of its SysUpdate custom remote access malware, allowing the Chinese cyberespionage group to target more services used in the enterprise. [...]
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
We detail the update that advanced persistent threat (APT) group Iron Tiger made on the custom malware family SysUpdate. In this version, we also found components that enable the malware to compromise Linux systems.
Marcus Hutchins, who set up a "kill switch" that stopped WannaCry's spread, later pled guilty to creating the infamous Kronos banking malware.
Overall malware detections also rise after three years of decline
Mobile malware developers were busy bees in 2022, flooding the cybercrime landscape with twice the number of banking trojans than the year before.
Asec said the malicious activity observed relied on VHD disk image files
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