Suspicious Inter-Process Communication via Outlook

sequence with maxspan=1m
[process where host.os.type == "windows" and event.action == "start" and
  (
    process.name : (
      "rundll32.exe", "mshta.exe", "powershell.exe", "pwsh.exe",
      "cmd.exe", "regsvr32.exe", "cscript.exe", "wscript.exe"
    ) or
    (
      (process.code_signature.trusted == false or process.code_signature.exists == false) and
      (process.Ext.relative_file_creation_time <= 500 or process.Ext.relative_file_name_modify_time <= 500)
    )
  ) and
  not (
    process.executable : "?:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe" and
    process.parent.executable : "?:\\Program Files (x86)\\CyberCNSAgent\\cybercnsagent.exe" and
    user.id == "S-1-5-18"
  )
] by process.entity_id
[process where host.os.type == "windows" and event.action == "start" and process.name : "OUTLOOK.EXE" and
  process.Ext.effective_parent.name != null] by process.Ext.effective_parent.entity_id