Silver Fox Uses Fake Tax Notices to Drop ValleyRAT and ABCDoor Backdoor

Silver Fox is running a tax‑themed phishing campaign that abuses fake notices from Indian and Russian tax authorities to drop ValleyRAT and a new Python backdoor dubbed ABCDoor, using a customized RustSL loader to evade detection and enforce strict geofencing controls. The campaign shows how the group is steadily evolving from commodity RAT delivery to […]

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