this one also 89.184.148.165

Me too
4 emails

190.187.38.126
192.139.15.33
201.65.222.131
200.111.115.172

I also got four emails with the IPs below, none of those IPs are mine.

209.208.78.113
203.172.173.74
212.233.184.189
119.110.70.120

I see I'm not the only one this bozo has tried it on. Only came back because of the email.

190.147.208.42
187.2.49.166

Me too!
173.72.110.132
189.125.35.194

Same here.

118.97.147.26 (Indonesia)
81.1.237.210 (Russian Federation)
114.35.167.38 (Taiwan)

This happens every so often, the site gets targeted by hackers looking for "weak" passwords...

No doubt they are trying the "username" as the password, and also the 10 or 15 most common passwords out there... (ie- "password", "1234", "12345," etc...)

This is why it is important to have strong passwords.

The built in "strikes" system in vBulletin makes true extended brute-force attacks impossible but unfortunately there are always people with weak passwords.

I had the same thing.

112.133.201.69
124.81.117.36
187.20.208.16
202.164.34.76

same for me.
Got 3 emails

186.101.66.238 - Philippines
189.3.236.66 - Brazil
186.101.66.238 - Ecuador

All 3 are known for spam.

Changed my password