Microsoft warns that attackers are deploying malware in ViewState code injection attacks using static ASP. NET machine keys found online. [...]
source https://www.bleepingcomputer.com/news/security/microsoft-says-attackers-use-exposed-aspnet-keys-to-deploy-malware/
source https://www.bleepingcomputer.com/news/security/microsoft-says-attackers-use-exposed-aspnet-keys-to-deploy-malware/