rule Worm_Win32_Vexral_A{ meta: description = "Worm:Win32/Vexral.A,SIGNATURE_TYPE_PEHSTR_EXT,0c 00 0c 00 05 00 00 " strings : $a_02_0 = {6a 40 68 00 30 00 00 ff 76 50 ff 76 34 ff 75 ?? ff [0-02] 3b c3 } //10 $a_00_1 = {23 42 4f 54 23 55 52 4c 44 6f 77 6e 6c 6f 61 64 } //1 #BOT#URLDownload $a_02_2 = {66 61 63 65 62 6f 6f 6b 2e [0-04] 2f 61 6a 61 78 2f 63 68 61 74 2f 73 65 6e 64 2e 70 68 70 } //1 $a_00_3 = {6c 6f 67 69 6e 5f 70 61 73 73 77 6f 72 64 3d } //1 login_password= $a_00_4 = {47 54 61 6c 6b 20 49 6e 73 74 61 6e 74 20 4d 65 73 73 61 67 65 } //1 GTalk Instant Message condition: ((#a_02_0 & 1)*10+(#a_00_1 & 1)*1+(#a_02_2 & 1)*1+(#a_00_3 & 1)*1+(#a_00_4 & 1)*1) >=12 }