Create Rockloader.yar

malware/Rockloader.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.
+
+*/
+
+/*
+  Description: Rar file with a .js inside
+  Author: iHeartMalware
+  Priority: 5
+  Scope: Against Attachment
+  Tags: http://phishme.com/rockloader-new-upatre-like-downloader-pushed-dridex-downloads-malwares/
+  Created in PhishMe Triage on April 7, 2016 3:41 PM
+*/
+
+rule rar_with_js
+{
+  strings:
+  $h1 = "Rar!" 
+  $s1 = ".js" nocase
+    
+  condition:
+    $h1 at 0 and $s1
+}
+
+
+
+rule RockLoader{
+meta:
+name = "RockLoader"
+description = "RockLoader Malware"
+author = "@seanmw"
+strings:
+$hdr = {4d 5a 90 00}
+$op1 = {39 45 f0 0f 8e b0 00 00 00}
+$op2 = {32 03 77 73 70 72 69 6e 74 66 41 00 ce 02 53 65}
+condition:
+$hdr at 0 and all of ($op*) and filesize < 500KB
+}