Experts from Talos Team discovered changes made to the Terror exploit kit (EK) that allow it to fingerprint victims and target specific vulnerabilities instead of carpet bombing the victims with many exploits at the same time. Terror EK was advertised on various underground forums by a hacker with the online moniker @666_KingCobra that is offering it for sale under different names (i.e. Blaze, Neptune, and Eris) The Terror Exploit Kit first appeared in the threat landscape in January 2017, in April experts observed a significant increase of hacking campaigns leveraging the EK.”]
Source: https://securityaffairs.co/wordpress/59321/malware/terror-exploit-kit-fingerprinting.html