Create APT_korplug_fast.yar

malware/APT_korplug_fast.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 Korplug_FAST {
+    meta:
+        description = "Rule to detect Korplug/PlugX FAST variant"
+        author = "Florian Roth"
+        date = "2015-08-20"
+        hash = "c437465db42268332543fbf6fd6a560ca010f19e0fd56562fb83fb704824b371"
+    strings:
+        $x1 = "%s\\rundll32.exe \"%s\", ShadowPlay" fullword ascii
+
+        $a1 = "ShadowPlay" fullword ascii
+
+        $s1 = "%s\\rundll32.exe \"%s\"," fullword ascii
+        $s2 = "nvdisps.dll" fullword ascii
+        $s3 = "%snvdisps.dll" fullword ascii
+        $s4 = "\\winhlp32.exe" fullword ascii
+        $s5 = "nvdisps_user.dat" fullword ascii
+        $s6 = "%snvdisps_user.dat" fullword ascii
+    condition:
+        uint16(0) == 0x5a4d and filesize < 500KB and 
+        (
+            $x1 or
+            ($a1 and 1 of ($s*)) or 
+            4 of ($s*)
+        )
+}