diff --git a/tools/generate_alexa.py b/tools/generate_alexa.py
new file mode 100644
index 0000000..4a85b12
--- /dev/null
+++ b/tools/generate_alexa.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import requests
+import zipfile
+import datetime
+import json
+
+alexa_url = "http://s3.amazonaws.com/alexa-static/top-1m.csv.zip"
+alexa_file = "top-1m.csv.zip"
+user_agent = {"User-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0"}
+r = requests.get(alexa_url, headers=user_agent)
+with open(alexa_file, 'wb') as fd:
+    for chunk in r.iter_content(4096):
+        fd.write(chunk)
+with zipfile.ZipFile(alexa_file, 'r') as alexa_lists:
+    for name in alexa_lists.namelist():
+        if name == "top-1m.csv":
+            with alexa_lists.open(name) as top:
+                top1000 = top.readlines()[:1000]
+        else:
+            continue
+
+alexa_warninglist = {}
+version = int(datetime.date.today().strftime('%Y%m%d'))
+
+alexa_warninglist['description'] = "Event contains one or more entries from the top 1000 of the most used website (Alexa)."
+d = datetime.datetime.now()
+alexa_warninglist['version'] = version
+alexa_warninglist['name'] = "Top 1000 website from Alexa"
+alexa_warninglist['type'] = 'hostname'
+alexa_warninglist['list'] = []
+alexa_warninglist['matching_attributes'] = ['hostname', 'domain']
+
+for site in top1000:
+    v = str(site).split(',')[1]
+    alexa_warninglist['list'].append(v[:-3])
+alexa_warninglist['list'] = sorted(set(alexa_warninglist['list']))
+print(json.dumps(alexa_warninglist))