rule Trojan_O97M_FinSevn_A_MTB{ meta: description = "Trojan:O97M/FinSevn.A!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,01 00 01 00 01 00 00 " strings : $a_00_0 = {4d 73 67 42 6f 78 20 28 22 44 6f 63 75 6d 65 6e 74 20 64 65 63 72 79 70 74 20 65 72 72 6f 72 2e 22 29 } //1 MsgBox ("Document decrypt error.") condition: ((#a_00_0 & 1)*1) >=1 }