A woman recently got a message from her mom on Facebook two weeks after her mom died. “Hello, how are you doing today?” it read. Other family members got messages, too — some with, surprise, “Great investment opportunities.”

A Ghost hacker had struck her mom’s account. It’s a sick new scam. With account owners dead and families focused on grief, the hacking is more likely to go unnoticed. It’s awful, and I want to make sure this doesn’t happen to you or someone you love.

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