Security Operations

The NGINX access.log of my VPS is showing a curiosity.

Instead of a simple request like this... "GET / HTTP/1.1"

...regular requests are coming in that look like this

"\x03\x00\x00\x13\x0E\xE0\x00\x00\x00\x00\x00\x01\x00\x08\x00\x03\x00\x00\x00"

Is this some kind of hack attempt?

Here's an example of a full line from the log...

15.204.204.182 - - [24/Apr/2024:15:59:47 +0000] "\x03\x00\x00\x13\x0E\xE0\x00\x00\x00\x00\x00\x01\x00\x08\x00\x03\x00\x00\x00" 400 166 "-" "-"

EDIT: For what it might be worth, most of these requests come in singularly, from different IP addresses. Once (that I've noticed) repeated attempts came in quickly from one specific IP.

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