Belgium’s interior ministry is investigating an attack against its network that appears to have the hallmarks of a cyberespionage campaign. The intrusion, which apparently occurred in April 2019, was not discovered until March when the ministry, along with Belgium’s Center for Cybersecurity, began patching for vulnerabilities in Microsoft Exchange email servers. The government did not say if the espionage campaign targeted Exchange servers or if this incident was related at all to the attacks that Microsoft has attributed to Hafnium, a Chinese threat group.”]