LABOR is infiltrating social media sites to promote John Brumby and smear his political opponents in an underground campaign being run by staffers who work in the Premier's taxpayer-funded private office.

The Age has obtained internal Labor documents revealing the identity, aliases and passwords of more than a dozen Labor players in the Twitter campaign as well as extensive lists of websites and blogs being trawled and manipulated by Labor's social media team.

Each twitter alias has a ''purpose'' labelled either ''Pro Labor'', ''Attack Dog'' or ''Super Attack'', with a member of Labor's three-person social media team responsible for mobilising them as campaign issues arise.

For example, during last week's town hall debate, Steph Antz, who is described as pro-Labor, tweeted: ''What is a billion dollars? ted showed myki. could have shown his car, jet, diamond urinal.''

In a spreadsheet monitoring online forums, a note on an election discussion topic on an English Premier League website read: ''Nothing for days, seems to have petered out. monitor/enjoy them calling peter ryan a c--t.''