diff --git a/Offensive.md b/Offensive.md
index 8373d47..4b26626 100644
--- a/Offensive.md
+++ b/Offensive.md
@@ -427,6 +427,10 @@ Some tools can be categorized in more than one category. But because the current
         <td><a href="https://github.com/huntresslabs/evading-autoruns">huntresslabs/evading-autoruns</a></td>
         <td>Slides and reference material from Evading Autoruns presentation at DerbyCon 7 (September 2017)</td>
     </tr>
+    <tr>
+        <td><a href="https://github.com/matterpreter/DefenderCheck">matterpreter/DefenderCheck</a></td>
+        <td>Identifies the bytes that Microsoft Defender flags on.</td>
+    </tr>
     <tr>
         <td><a href="https://github.com/mdsecactivebreach/Chameleon">mdsecactivebreach/Chameleon</a></td>
         <td>Chameleon: A tool for evading Proxy categorisation</td>