Silver Fox Deploys ABCDoor Malware via Tax-Themed Phishing in India and Russia

The China-based cybercrime group known as Silver Fox (aka Monarch, SwimSnake, The Great Thief of Valley, UTG-Q-1000, and Void Arachne) has been linked to a new campaign targeting organizations in Russia and India with a new malware called ABCDoor. The activity involved using phishing emails that mimic correspondence from the Income Tax Department of India in December 2025, followed by a similar