Yes, jimage is relatively new but this is more about the way the ransomware attempts to evade detection. The way it gets in, according to the Blackberry articl

Yes, jimage is relatively new but this is more about the way the ransomware attempts to evade detection. The way it gets in, according to the Blackberry article, is through vulnerable, internet-facing (or anyway, hostile-facing) RDP servers this is much less eh 'innovative'. You are (presumably) safe if you have no exposed/vulnerable RDP servers.