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That is, a user downloads attachment from email and runs it, will the ransomware run silently without showing the security prompt/UAC (that should block non-administrator users...)

marked as duplicate by Steffen Ullrich, Community May 13 '17 at 10:25

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • typically the user is prompted before "a user downloads attachment from email and runs it"... – dandavis May 13 '17 at 12:38

Ransomware wouldn't need to raise a UAC alert as it is after a user's personal files, not system files.

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