Is there currently a way to get the Stella Victory badge?
Solution 1:
During anomaly last week (June 20th, 2015) in Utrecht, there was a card given with an encrypted message to decode. Agents who were able to give the right answer before midnight won Stella's badge (even without being present et anomaly event).
Sorry it's too late now. My answer if you want these kind of badges is go to anomaly events, and if not at least be in contact with people going there.