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Silver Fox APT Deploys DLL Sideloading and BYOVD in Advanced Malware Campaign

Gbhackers •Mayura Kathir • February 23, 2026

Silver Fox APT is running a new wave of targeted attacks in Taiwan that combine DLL sideloading and Bring Your Own Vulnerable Driver (BYOVD) techniques to deploy Winos 4.0 (ValleyRat) while aggressively disabling security tools. The campaigns rely on highly localized tax and e‑invoice lures and fast‑changing infrastructure, making them difficult to block with static […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Silver Fox APT Targets Taiwan with Winos 4.0 Malware Campaign Silver Fox APT is conducting targeted attacks in Taiwan utilizing DLL sideloading and BYOVD techniques to deploy Winos 4.0 (ValleyRat). The campaigns leverage localized phishing lures related to tax and e-invoice processes, impacting Microsoft Windows users and leading to widespread file encryption and potential data theft. 4 sources 45

Extracted Entities

Silver Fox APT Deploys DLL Sideloading and BYOVD in Advanced Malware Campaign

The full story

Extracted Entities

APT Groups (1)

Attack Types (1)

Countries (1)

Malware (2)

MITRE ATT&CK (2)