Silver Fox uses new ABCDoor backdoor to target organisations in Russia and India

In December 2025, Kaspersky researchers detected a wave of malicious emails designed to look like official correspondence from the Indian tax service. A few weeks later, in January 2026, a similar campaign began targeting Russian organizations. Kaspersky have attributed this Read More …

Massive Winos 4.0 Campaigns Target Taiwan

FortiGuard Labs recently observed several targeted phishing campaigns in Taiwan that use themes designed to exploit local business processes. These campaigns disseminate Winos 4.0 (ValleyRat) and subsequent malicious plugins through weaponized attachments or embedded links. The lures mimic official communications, Read More …

A Deep Dive into a New ValleyRAT Campaign Targeting Chinese Speakers

FortiGuard Labs recently encountered an ongoing ValleyRAT campaign specifically targeting Chinese speakers. This malware has historically targeted e-commerce, finance, sales, and management enterprises. ValleyRAT is a multi-stage malware that utilizes diverse techniques to monitor and control its victims and deploy Read More …