I got this email 8 days ago:
Subject: "EXS" WARNING!!! Attack!!! "EXS"
We are a HACKER TEAM - Armada Collective
1 - We have checked your information security systems, setup is poor; the systems are very vulnerable and obsolete.
2 - We'll begin attack on Tuesday 06-09-2016 8:00 p.m.!!!!!
3 - We'll execute some targeted attacks and check your DDoS servers by the 10-300 Gbps attack power
4 - We'll run a security breach test of your servers through the determined vulnerability, and we'll gain the access to your databases.
5 - All the computers on your network will be attacked for Cerber - Crypto-Ransomware
6 - You can stop the attack beginning, if payment 1 bitcoin to bitcoin ADDRESS: [snip]
7 - If you do not pay before the attack 1 bitcoin, the price will increase to 20 bitcoins
8 - You have time to decide! Transfer 1 bitcoin to ADDRESS: [snip]
The rest of it was telling me how to use bitcoin to send them money.
I don't know whose servers they hit last Tuesday because I don't own any :)