As irritating as a real case of the crabs can be, organizations now have to deal with GandCrab v4 – a more dangerous and invasive newly released strain of the notorious ransomware.
If you don’t recall, the industry first saw GandCrab as a ransomware kit purchased by individuals and traditionally embedded as part of BitTorrent downloads, etc. Relatively benign in today’s world, GandCrab only really works in environments where security is completely lacking (e.g. no antivirus, as AV will easily spot this), and where the existing patch (that has been out since May of 2017) hasn’t been applied.
Refer Here for Original Post and Source https://blog.knowbe4.com/dont-catch-a-case-of-the-grandcrabs