The suspected hacker group , D33ds , used Using a method of SQL Injection to penetrate Defending Yahoo !

The email addresses Name_conferral and passwords are still available to download Having_or_lacking_access in a plaintext file on the hacker 's website .

The hacker group described Communication the hack as a `` wake-up call '' for Yahoo !

HAL2001 was a Dutch hacker con held Defending at the University of Twente , Enschede , Netherlands in August 2001 .