Potential Remote Install via MsiExec

process where host.os.type == "windows" and event.type == "start" and
  process.name : "msiexec.exe" and process.args : ("-i*", "/i*", "-p*", "/p*") and
  process.command_line : ("*http:*", "*https:*") and
  process.args : ("/qn", "-qn", "-q", "/q", "/quiet") and
  process.parent.name : (
    "sihost.exe", "explorer.exe", "cmd.exe", "wscript.exe", "mshta.exe",
    "powershell.exe", "wmiprvse.exe", "pcalua.exe", "forfiles.exe", "conhost.exe"
  ) and

  not process.command_line : (
        "*--set-server=*", "*UPGRADEADD=*" , "*--url=*", "*USESERVERCONFIG=*", "*RCTENTERPRISESERVER=*",
        "*app.ninjarmm.com*", "*zoom.us/client*", "*SUPPORTSERVERSTSURI=*", "*START_URL=*", "*AUTOCONFIG=*",
        "*awscli.amazonaws.com*", "*/i \"C:*", "*/i C:\\*"
  )