SUNBURST and SUPERNOVA backdoor hashes (Normalized File Events)

Identifies SolarWinds SUNBURST and SUPERNOVA backdoor file hash IOCs in File Events To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimFileEvent) References: - https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html - https://gist.github.com/olafhartong/71ffdd4cab4b6acd5cbcd1a0691ff82f