Cyber extortion via ransomware is the threat of the hour. Countermeasures are often well-intentioned and at the same time full of holes. User sensitisation to find the "wrong" attachment may reduce a risk. However, it remains unrealistic that a user will not click "wrong" once in the future.

Protect yourself from the initial error case (mostly) with on-board means. Test yourself free of charge. No product is presented, but a concept.