My site recently had a failed hacking attempt but I don't understand why someone would try this way. In the space of 1 min, thirty or so log in attempts were made using mostly nonsensical usernames.

Normally I see one or two attempts with names like admin, or wphiddenbot (not sure why that) and then they stop.

But this was one was repeated numerous times, every time with a new username and one that is unlikely to be used such as 'guflhane'.

What is the logic in trying such attempts? The usernames seem so unlikely to be used anywhere, one or two were more realistic such as 'pv_admin', but none were the usualy suspects like admin.

Anyone else seen this?

EDIT: I think the point of my questions is getting lost. To clarify, I know it's bots, I also see lots of login attempts all the time. Most of the them are usually trying common usernames or names that might be associated with my site, or as I said I see some ones repeated like 'wphiddenbot'.

But my question was trying to understand what's the point in trying so many weird usernames, the usernames they tried were mostly very odd 8 to 10 letter strings