LoFP / legitimate scheduled tasks running third party software.

process where host.os.type == "windows" and event.type == "start" and
    /* Schedule service cmdline on Win10+ */
    process.parent.name : "svchost.exe" and process.parent.args : "Schedule" and
    /* add suspicious programs here */
    process.pe.original_file_name in
                                (
                                  "cscript.exe",
                                  "wscript.exe",
                                  "PowerShell.EXE",
                                  "Cmd.Exe",
                                  "MSHTA.EXE",
                                  "RUNDLL32.EXE",
                                  "REGSVR32.EXE",
                                  "MSBuild.exe",
                                  "InstallUtil.exe",
                                  "RegAsm.exe",
                                  "RegSvcs.exe",
                                  "msxsl.exe",
                                  "CONTROL.EXE",
                                  "EXPLORER.EXE",
                                  "Microsoft.Workflow.Compiler.exe",
                                  "msiexec.exe"
                                  ) and
    /* add suspicious paths here */
    process.args : (
       "C:\\Users\\*",
       "C:\\ProgramData\\*",
       "C:\\Windows\\Temp\\*",
       "C:\\Windows\\Tasks\\*",
       "C:\\PerfLogs\\*",
       "C:\\Intel\\*",
       "C:\\Windows\\Debug\\*",
       "C:\\HP\\*") and

     not (process.name : "cmd.exe" and process.args : "?:\\*.bat" and process.working_directory : "?:\\Windows\\System32\\") and
     not (process.name : "cscript.exe" and process.args : "?:\\Windows\\system32\\calluxxprovider.vbs") and
     not (process.name : "powershell.exe" and process.args : ("-File", "-PSConsoleFile") and user.id : "S-1-5-18") and
     not (process.name : "msiexec.exe" and user.id : "S-1-5-18")