What bot is scanning the server?

Question

Apache HTTP Server

Hello dear. In the Apache log I see numerous:

==> /var/log/apache2/other_vhosts_access.log <==
localhost:80 178.213.249.120 - - [21/Apr/2014:12:23:09 +0400] "\x16\x03\x01\x02" 400 0 "-" "-"
localhost:80 178.213.249.120 - - [21/Apr/2014:12:23:09 +0400] "\x16\x03\x01\x02" 400 0 "-" "-"
localhost:80 178.213.249.120 - - [21/Apr/2014:12:23:39 +0400] "\x16\x03\x01\x02" 400 0 "-" "-"
localhost:80 178.213.249.120 - - [21/Apr/2014:12:23:39 +0400] "\x16\x03\x01\x02" 400 0 "-" "-"

How to interpret these records and how dangerous it can be?

Answer 1

It turned out that these were requests from the owncloud client via https. There used to be a server here, but now there isn't.