diff --git a/clusters/rat.json b/clusters/rat.json
index 88c8535..abf2a44 100644
--- a/clusters/rat.json
+++ b/clusters/rat.json
@@ -7,7 +7,7 @@
   ],
   "description": "remote administration tool or remote access tool (RAT), also called sometimes remote access trojan, is a piece of software or programming that allows a remote \"operator\" to control a system as if they have physical access to that system.",
   "uuid": "312f8714-45cb-11e7-b898-135207cdceb9",
-  "version": 7,
+  "version": 8,
   "values": [
     {
       "meta": {
@@ -2409,7 +2409,8 @@
         "refs": [
           "http://blog.jpcert.or.jp/.s/2018/03/malware-tscooki-7aa0.html"
         ]
-      }
+      },
+      "uuid": "7b107b46-4eca-11e8-b89f-0366ae765ddd"
     },
     {
       "value": "Coldroot",
@@ -2420,7 +2421,8 @@
           "https://www.bleepingcomputer.com/news/security/coldroot-rat-still-undetectable-despite-being-uploaded-on-github-two-years-ago/",
           "https://github.com/xlinshan/Coldroot"
         ]
-      }
+      },
+      "uuid": "86f1f048-4eca-11e8-a08e-7708666ace6e"
     },
     {
       "value": "Comnie",
@@ -2431,7 +2433,18 @@
           "https://exchange.xforce.ibmcloud.com/collection/East-Asia-Organizations-Victims-of-Comnie-Attack-12749a9dbc20e2f40b3ae99c43416d8c",
           "https://researchcenter.paloaltonetworks.com/2018/01/unit42-comnie-continues-target-organizations-east-asia/"
         ]
-      }
+      },
+      "uuid": "d14806fe-4ecb-11e8-a120-ff726de6a4d3"
+    },
+    {
+      "value": "GravityRAT",
+      "description": "GravityRAT has been under ongoing development for at least 18 months, during which the developer has implemented new features. We've seen file exfiltration, remote command execution capability and anti-vm techniques added throughout the life of GravityRAT. This consistent evolution beyond standard remote code execution is concerning because it shows determination and innovation by the actor. ",
+      "meta": {
+        "refs": [
+          "https://blog.talosintelligence.com/2018/04/gravityrat-two-year-evolution-of-apt.html"
+        ]
+      },
+      "uuid": "2d356870-4ecd-11e8-9bb8-e3ba5aa7da31"
     }
   ]
 }