Oracle Default Password List is the home for the Oracle default password list that we have collated. This page includes a big list of Oracle default users, passwords and hashes. It’s probably the biggest such source on the net but how did we create it? This is simple because there are various sources to get these users from on the Internet or in books or documentation. Problems can also occur when employees run examples from books, or documentation (official and non-official), books or web sites. There are still 14 default accounts that can be created in 10g with known passwords.”]
Source: http://www.petefinnigan.com/default/default_password_list.htm