ISC StormCast for Friday, May 21st, 2021

New YouTube Video Series: Everything you ever wanted to know about DNS and more
https://isc.sans.edu/forums/diary/New+YouTube+Video+Series+Everything+you+ever+wanted+to+know+about+DNS+and+more/27440/
And Ransomware Just Got a Bit Meaner
https://isc.sans.edu/forums/diary/And+Ransomware+Just+Got+a+Bit+Meaner+yes+it+is+possible/27438/
Attackers Scanned for Exchange Servers Five Minutes after Patch Release
https://www.ehackingnews.com/2021/05/microsoft-exchange-bug-report-allowed.html
GPS For Authentication: Is the Juice Worth the Squeeze @sans_edu
https://www.sans.org/reading-room/whitepapers/authentication/gps-authentication-juice-worth-squeeze-40270