diff --git a/clusters/tool.json b/clusters/tool.json
index 90386e7..794c7fd 100644
--- a/clusters/tool.json
+++ b/clusters/tool.json
@@ -5853,7 +5853,17 @@
           "type": "similar"
         }
       ]
+    },
+    {
+      "value": "ZEBROCY",
+      "description": "ZEBROCY is a tool used by APT28, which has been observed since late 2015. The communications module used by ZEBROCY transmits using HTTP. The implant has key logging and file exfiltration functionality and utilises a file collection capability that identifies files with particular extensions.",
+      "meta": {
+        "refs": [
+          "https://www.ncsc.gov.uk/alerts/indicators-compromise-malware-used-apt28"
+        ]
+      },
+      "uuid": "8a2ae47a-c7b2-11e8-b223-ab4d8f78f3ef"
     }
   ],
-  "version": 90
+  "version": 91
 }