My advice
Take plugin WP-Ban to ban those IP addresses:
173.234.97.245
173.234.138.230
173.234.238.167
173.234.133.170
108.62.45.136
108.62.160.245
108.62.161.234
108.62.162.188
108.62.163.182
108.62.166.131
My advice
Take plugin WP-Ban to ban those IP addresses:
173.234.97.245
173.234.138.230
173.234.238.167
173.234.133.170
108.62.45.136
108.62.160.245
108.62.161.234
108.62.162.188
108.62.163.182
108.62.166.131