A cikin 1670 Razin, yayin da yake kan hanyarsa ta yin rahoto a hedkwatar Cossack a kan Don, ya fito fili ya yi tawaye ga gwamnati, ya kama Cherkassk da Tsaritsyn.Bayan kama Tsaritsyn, Razin ya tashi zuwa Volga tare da sojojinsa kusan 7,000.Mutanen sun yi tattaki zuwa Cherny Yar, wata tungar gwamnati tsakanin Tsaritsyn da Astrakhan.Razin da mutanensa suka ɗauki Cherny Yar da sauri a lokacin da Cherny Yar streltsy suka tashi da jami'ansu kuma suka shiga aikin Cossack a watan Yuni 1670. A ranar 24 ga Yuni ya isa birnin Astrakhan.Astrakhan, "taga na Gabas" na Moscow arziƙin Moscow ya mamaye wani wuri mai mahimmanci a bakin kogin Volga a bakin Tekun Caspian.Razin ya wawashe birnin duk da wurin da yake a wani tsibiri mai kagara da ganuwar dutse da tagulla da ke kewaye da babban kagara.Bayan ya kashe duk waɗanda suka yi hamayya da shi (ciki har da sarakuna biyu Prozorovsky) da kuma ba da arziƙin kasuwannin birnin don yin wawashe, ya mai da Astrakhan zuwa jamhuriyar Cossack.A cikin 1671, dattawan Cossack sun kama Stepan da ɗan'uwansa Frol Razin a sansanin Kagalnik (Кагальницкий городок).Daga nan aka kashe Stepan a Moscow.