Tool for injecting events into Windows Event log
EventInjector is a command line tool, for usage details use EventInjector -h.
"-" and "/" are interchangeable.
Windows allows for any user, even unprivileged, to write in Application log as any other user, System and Security, however, require permissions. For System log, administrator permissions are necessary, while Security log requires generate auditing events permission, with running as Local System being the simplest way to achieve all requirements with the least of registry/GPO modifications.
Application logs are indiscernible from legitimate events, but System events show minor differences as it appears to use a different API to register events.