diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 8ac60048..30d1389b 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -376,7 +376,8 @@
             "CRC-8 Checksum",
             "CRC-16 Checksum",
             "CRC-32 Checksum",
-            "TCP/IP Checksum"
+            "TCP/IP Checksum",
+            "NTLM"
         ]
     },
     {
diff --git a/src/core/operations/NTLM.mjs b/src/core/operations/NTLM.mjs
new file mode 100644
index 00000000..432b9aee
--- /dev/null
+++ b/src/core/operations/NTLM.mjs
@@ -0,0 +1,46 @@
+/**
+ * @author brun0ne [brunonblok@gmail.com]
+ * @copyright Crown Copyright 2022
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+
+import cptable from "codepage";
+import {runHash} from "../lib/Hash.mjs";
+
+/**
+ * NTLM operation
+ */
+class NTLM extends Operation {
+
+    /**
+     * NTLM constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "NTLM";
+        this.module = "Crypto";
+        this.description = "Performs NTLM hashing on the input. It works by running MD4 on UTF16LE-encoded input. NTLM hashes are considered weak because they can be brute-forced very easily with modern hardware.";
+        this.infoURL = "https://en.wikipedia.org/wiki/NT_LAN_Manager";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const format = 1200;
+        const encoded = cptable.utils.encode(format, input);
+        const hashed = runHash("md4", encoded);
+
+        return hashed.toUpperCase();
+    }
+}
+
+export default NTLM;
diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index f4294cad..9879552c 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -121,7 +121,7 @@ import "./tests/Subsection.mjs";
 import "./tests/CaesarBoxCipher.mjs";
 import "./tests/LS47.mjs";
 import "./tests/LZString.mjs";
-
+import "./tests/NTLM.mjs";
 
 // Cannot test operations that use the File type yet
 // import "./tests/SplitColourChannels.mjs";
diff --git a/tests/operations/tests/NTLM.mjs b/tests/operations/tests/NTLM.mjs
new file mode 100644
index 00000000..1dc39d5c
--- /dev/null
+++ b/tests/operations/tests/NTLM.mjs
@@ -0,0 +1,22 @@
+/**
+ * NTLM test.
+ *
+ * @author brun0ne [brunonblok@gmail.com]
+ * @copyright Crown Copyright 2022
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "NTLM Hashing",
+        input: "QWERTYUIOPASDFGHJKLZXCVBNM1234567890!@#$%^&*()_+.,?/",
+        expectedOutput: "C5FA1C40E55734A8E528DBFE21766D23",
+        recipeConfig: [
+            {
+                op: "NTLM",
+                args: [],
+            },
+        ],
+    }
+]);