This is the prompt for the "doge vault" challenge:
We recently found a secret briefcase belonging to a user aliased as '69dogeslayer96.' Our intel indicates that the briefcase contains millions of dogecoin private keys recently stolen from dogewallet (http://techcrunch.com/2013/12/25/dogecoin-hack/). To unlock the briefcase, we need dogeslayer's personal briefcase password. Luckily, we have recently heard of some vulnerabilities originating from dogeslayer's personal bank, "doge vault." Find us the key to the briefcase and we'll make sure you are rewarded.