A screen grab of a database stolen from the systems of Wall Street Journal, has been published on Twitter by a hacker that has been previously involved in similar incidents affecting other news publications. The hacker, posting on the micro-blogging platform under the handle w0rm (@rev_priv8), showed the image as proof of the nefarious deed, which seems to have provided access to user credentials. In a subsequent tweet, the hacker offered to sell it to anyone who would send a s…