April 16, 2022: Complete State Postal System Outage in Bulgaria
A major Russian-originated ransomware attack occurred on the Bulgarian State Post Office system. Hackers moved laterally into all IT and OT systems affecting all 26 services offered.
Besides affecting systems for payment and transfer of money, pensions, etc, the sending and receiving of post, domestic and international was interrupted for weeks. After a time, post could be received but only if the recipient did not owe amounts at time of delivery.