One of the largest distributed brute force attacks on WordPress installations ever seen is currently going on, as reported by Mark Maunder of Wordfence Security on his blog. You can read the full post here. The attempts at hacking are running 30 times more frequently than average.
A brute force attack is when an attacker tries many times to guess your username password combination by repeatedly sending login attempts. A distributed brute force attack is when an attacker uses a large number of machines spread around the internet to do this in order to circumvent any blocking mechanisms you have in place.
If you have a WordPress-based site, I highly recommend that you pay close attention to it until these brute force attempts have waned. If you suspect that you’ve been hacked, and need help recovering, you can always contact us here at Diamond Mind Web Design.