https://www.bleepingcomputer.com/news/security/rig-exploit-kit-drops-redline-malware-via-internet-explorer-bug/

Threat analysts have uncovered yet a new campaign that uses the RIG Exploit Kit to deliver the RedLine stealer malware.

Exploit kits (EKs) have dropped drastically in popularity as they targeted vulnerabilities in web browsers introduced by plug-in software such as the now-defunct Flash Player and Microsoft Sillverlight.