Coverage of Trojan malware examines reported incidents, technical analysis, infrastructure, disruption efforts, and defensive guidance for reducing cyber risk.
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Background for this topic.
A Trojan is malware that masquerades as legitimate, useful, or necessary software so a user or process runs it. “Trojan” describes a delivery or deception technique rather than one malware family; capabilities vary by sample and may include credential theft, surveillance, file manipulation, or remote access. Unlike self-propagating malware, a Trojan generally depends on being installed or executed through some other means.
Security analysis should identify the specific family and executable behavior rather than treating every Trojan as equivalent. Material concerns include untrusted software and tampered installers, execution under excessive privileges, and unauthorized persistence or access to sensitive data. Defenses include using trusted software sources and code-signature or application-control checks, limiting user privileges, monitoring endpoint process and network activity, and isolating suspected hosts. After detection, preserve relevant evidence, remove persistence, assess credential exposure, and investigate other affected systems before returning the device to normal use.
The UNC-200 threat group, active since last summer, has been utilizing the Signal messaging app to social engineer targets into downloading an infostealing remote access Trojan.
Microsoft is calling attention to a novel remote access trojan (RAT) named StilachiRAT that it said employs advanced techniques to sidestep detection and persist within target environments with an ultimate aim to steal sensitive data
Microsoft has discovered a new remote access trojan (RAT) that employs "sophisticated techniques" to avoid detection, ensure persistence, and extract sensitive information data. [...]