At the Internet Storm Center, we like to show how exotic extensions can be used to make victims feel confident to open malicious files. There is an interesting webpage that maintains a list of dangerous extensions used by attackers: filesec.io[1]. The list is regularly updated and here is an example of malicious file that is currently not listed: “XLL”. It’s not a typo, it’s not a “DLL” but close to!
Article Link: InfoSec Handlers Diary Blog