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 threat actors behind the Windows-based Grandoreiro banking trojan have returned in a global campaign since March 2024 following a law enforcement takedown in January
The banking trojan "Grandoreiro" is spreading in a large-scale phishing campaign in over 60 countries, targeting customer accounts of roughly 1,500 banks. [...]
The Android banking trojan "Grandoreiro" is spreading in a large-scale phishing campaign in over 60 countries, targeting customer accounts of roughly 1,500 banks. [...]
A new banking Trojan targeting Android devices shows multifaceted capabilities
Cybersecurity researchers have shed more light on a remote access trojan (RAT) known as Deuterbear used by the China-linked BlackTech hacking group as part of a cyber espionage campaign targeting the Asia-Pacific region this year
Also: Turla Targets European Missions and Google Patches Chrome Zero-DaysThis week, hackers used a Linus backdoor and a Microsoft client management tool; Santander Bank, the Helsinki Education Division, an Australian energy provider and auction house Christie's were breached; hackers targeted European missions in the Middle East; and Google patched a zero-day flaw.