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TerminalFix campaign uses fake CAPTCHA, DLL sideloading, reverse tunnel
- Engineer — Learn: DLL sideloading via fake CAPTCHA lures is a pattern worth understanding for hardening application allow-listing and endpoint controls, but no specific software patch or configuration change is required from this report alone.
- SOC/IR — Act: Microsoft’s analysis includes detections and hunting guidance — run the published hunts in your SIEM/EDR for DLL sideloading chains and reverse tunnel beaconing, and tune detections for ClickFix-style CAPTCHA lure execution paths since this campaign is actively tracked.
- Leader — Learn: Useful background on a live social-engineering campaign targeting enterprises, but no vendor breach or regulatory trigger is present; file for situational awareness and board-deck threat landscape context.
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