Ransomware
Abuser: Bomb threat email, sub: "We can make a deal"
Partial email message body: "My man hid a bomb (lead azide) in the building where your business is conducted. It was constructed according to my guide. It is small and it is hidden very well, it is impossible to destroy the supporting building structure by this explosive device, but you will get many victims in the case of its detonation. My mercenary keeps the territory under the control. If any unnatural activityor emergency is noticed the bomb will be blown up. I would like to propose you a deal. You transfer me $20'000 in Bitcoin and explosive will not explode, but do not try to cheat -I warrant you that I will call off my man solely after 3 confirmations in blockchain network. "