need firmware for sm-n9200 mt6572

i need help to find firmware fr sm-n9200 i recevd phone work but he have some virus i try to us smart av in infinity miracle chinise after scan he remove 100 file infected afte operation done the phone hang in logo samsung

Brand : alps
ProdName : rtech72_we_72_kk
ProdModel : Sony Xperia Z3
Device : rtech72_we_72_kk
AndroidVer: 4.4.2
MTKxCPU : MT6572