What is the 'Pennywise' malware that uses YouTube videos to steal crypto?

Cyber intelligence company Cyble has warned of an "emerging threat" from a crypto-stealing malware called 'Pennywise' which may potentially spread through YouTube. Fraudsters are reportedly marketing 'Pennywise' as a free Bitcoin mining software and it can target 30 crypto wallets and browser extensions. More than 80 YouTube videos have been found that may expose users to potential hacks.