rule Backdoor_Win32_Pirpi_D{ meta: description = "Backdoor:Win32/Pirpi.D,SIGNATURE_TYPE_PEHSTR_EXT,02 00 02 00 02 00 00 01 00 " strings : $a_03_0 = {8b 7c 24 1c 57 33 f6 ff d3 85 c0 75 1a 8b 2d e0 80 00 10 83 fe 14 7f 0f 68 90 01 02 00 00 46 ff d5 57 ff d3 85 c0 74 ec 90 00 } //01 00 $a_03_1 = {8d 7c 24 0c f3 a5 8b b4 24 90 01 02 00 00 85 ed 7e 21 8d 4c 24 0c 53 8a 9c 24 90 1b 00 00 00 8b c6 2b ce 8b fd 8a 14 01 32 d3 30 10 88 14 01 40 4f 75 f2 90 00 } //00 00 condition: any of ($a_*) }