The tenth Symposium on Electronic Crime Research (eCrime) 2015 once again will be held in conjunction with the 2015 APWG General Meeting and the fifth eCrime Sync-up between May 26-29, 2015 in Caixa Forum, in Barcelona, Spain. eCrime 2015 consists of 4 days of keynote presentations, technical and practical sessions and interactive panels, which will allow academic researchers, security practitioners, and law enforcement to discuss and exchange ideas, experiences and lessons learnt in all aspects of electronic crime and ways to combat it.