Added domain and URL rules

utils/domain.yar

+/*
+    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as
+    long as you use it under this license.
+*/
+
+rule domain {
+    meta:
+        author = "Antonio S. <asanchez@plutec.net>"
+    strings:
+        $domain_regex = /([\w\.-]+)/ wide ascii
+    condition:
+        $domain_regex
+}

utils/url.yar

+/*
+    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as
+    long as you use it under this license.
+*/
+
+rule url {
+    meta:
+        author = "Antonio S. <asanchez@plutec.net>"
+    strings:
+        $url_regex = /https?:\/\/([\w\.-]+)([\/\w \.-]*)/ wide ascii
+    condition:
+        $url_regex
+}