rule TrojanDownloader_O97M_EncDoc_RSF_MTB{ meta: description = "TrojanDownloader:O97M/EncDoc.RSF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 " strings : $a_02_0 = {6d 6f 72 72 69 73 6c 69 62 72 61 72 79 63 6f 6e 73 75 6c 74 69 6e 67 2e 63 6f 6d 2f 66 61 76 69 63 61 6d 2f 67 65 72 74 6e 6d 2e 70 68 70 90 0a 36 00 68 74 74 70 73 3a 2f 2f } //1 $a_02_1 = {43 3a 5c 68 79 72 64 71 [0-03] 5c 67 77 6e 69 6f 77 } //1 $a_00_2 = {6e 66 69 77 70 66 2e 65 78 65 } //1 nfiwpf.exe $a_00_3 = {4a 4a 43 43 43 43 4a } //1 JJCCCCJ condition: ((#a_02_0 & 1)*1+(#a_02_1 & 1)*1+(#a_00_2 & 1)*1+(#a_00_3 & 1)*1) >=4 }