Added Telefonica Ransomware rule

malware/RANSOM_Telefonica.yar

+import "pe"
+
+rule ransom_telefonica : TELEF
+{
+	meta: 
+		author = "Joan Bono <@joan_bono>"
+		description = "Ransmoware Telefonica"
+		date = "2017-05-12"
+		reference = "http://www.elmundo.es/tecnologia/2017/05/12/59158a8ce5fdea194f8b4616.html"
+		md5 = "7f7ccaa16fb15eb1c7399d422f8363e8"
+		sha256 = "2584e1521065e45ec3c17767c065429038fc6291c091097ea8b22c8a502c41dd"
+	strings:	
+		$a = "115p7UMMngoj1pMvkpHijcRdfJNXj6LrLn" wide ascii nocase
+		$b = "12t9YDPgwueZ9NyMgw519p7AA8isjr6SMw" wide ascii nocase
+		$c = "13AM4VW2dhxYgXeQepoHkHSQuy6NgaEb94" wide ascii nocase
+		$d = "tasksche.exe"
+		$e = "RegCreateKeyW" wide ascii nocase
+		$f = "cmd.exe /c"
+	condition:
+		pe.characteristics and
+		for any of ($a, $b, $c, $d, $e, $f): (@ > @a)
+}
+