The remote host is an AWS EC2 instance for which metadata could be retrieved. (The remote host is an AWS EC2 instance for which metadata could be\nretrieved.)
SK4 unified event:
Tue Jun 04 2019 09:43:39 GMT+0000 (Coordinated Universal Time)
Tue Jun 18 2019 11:10:28 GMT+0000 (Coordinated Universal Time)
The remote host appears to be an Amazon Machine Image. Nessus was able to use the metadata API to collect information about the system.
cef_vendor="skyformation" cef_name="security-threat-detected" destinationServiceName="Tenable.io" dpriv="VULNERABILITY" proto="Amazon Web Services EC2 Instance Metadata Enumeration (Unix)" act="detect"