Create file_event_win_malware_darkgate_autoit3_save_temp.yml

[tomaszdyduch]

Summary of the Pull Request

Creating new rule to detect new variant of DarkGate loader then it is writing files into C:\temp folder.

Changelog

new: DarkGate - Save DarkGate Loader in Temp

Example Log Event

Fixed Issues

SigmaHQ Rule Creation Conventions

• If your PR adds new rules, please consider following and applying these conventions