Fixed RTF_Shellcode regular expression

Malicious_Documents/malicious_document.yar

@@ -275,20 +275,19 @@ rule Embedded_EXE_Cloaking : maldoc {
 // This rule have beed improved by Javier Rascon
 rule RTF_Shellcode : maldoc
 {
-meta:
+    meta:
 
         author = "RSA-IR – Jared Greenhill"
         date = "01/21/13"
         description = "identifies RTF's with potential shellcode"
             filetype = "RTF"
 
-
-
-strings:
+    strings:
         $rtfmagic={7B 5C 72 74 66}
         /* $scregex=/[39 30]{2,20}/ */
-                $scregex=/(39 30){2,20}/
-condition:
+        $scregex=/(90){2,20}/
+
+    condition:
 
         ($rtfmagic at 0) and ($scregex)
 }