Belgian media outlets, a radio station and TV station, claim that the attack may have been conducted by a group using Ryuk ransomware. The website has also provided a non-exhaustive list of services that have been impacted. The attack on Lige is just the latest in a catalogue of ransomware attacks against cities, schools, hospitals, health services and other critical infrastructure that has been going on for years, and getting steadily worse. In 2020 average ransom payments increased 170 percent year-on-year and the total sum paid in ransoms increased 310 percent.”]
Source: https://blog.malwarebytes.com/ransomware/2021/06/city-of-liege-hit-by-ransomware-ryuk-suspected/