You are responsible for identifying suspicious activity and security events at your organization. You have been asked to search in Google Security Operations (SecOps) for network traffic associated with an active HTTP backdoor that runs on TCP port 5555. You want to use the most effective approach to identify traffic originating from the server that is running the backdoor. What should you do?
- ADetect on events where network.ApplicationProtocol is HTTP.
- BDetect on events where target.port is 5555.
- CDetect on events where principal.port is 5555. (correct answer)
- DDetect on events where network.ip_protocol is TCP.
Reveal answer & explanationHide answer
The correct answer is C. Option C: Detect on events where principal.port is 5555. This option keeps traffic private / properly secured as required. The other options (A, B, D) are less suitable because they add operational overhead, cost, or complexity, or they do not fully satisfy the stated requirement.