Hi Guys, I had 2 hack attack days ago with WHMCS v.4. After first attach I did change all my passwords and even usernames also made a .htaccess and .htpasswd for admin folder. But it didn't help even this.. This hacker team entered the admin area anyway. I saw also several login in my admin page with forginer IP's below:
31.214.144.222
188.53.190.145
31.166.44.242
46.153.94.16
80.90.168.43
2.89.87.211
84.235.73.253
89.123.6.159
93.158.147.8
213.186.127.7
Anyway , i already blocked them to access my server also deleted all WHMCS.