What is Kerberoasting?

Kerberoasting is a type of attack that exploits vulnerabilities in the Kerberos authentication protocol. This attack involves an adversary requesting a service ticket from the domain controller and extracting the encrypted service account password from the response. Once the password has been extracted, the attacker can use powerful tools to crack it, giving them access to the target account and potentially compromising the entire network.

How to protect?

Fortunately, there are several ways to protect against kerberoasting. In this blog post, we will discuss some of the most effective methods to safeguard your organization's assets.

1. Use strong, complex passwords
   The stronger the password, the harder it is for attackers to crack. Encourage your users to use long, complex passwords with a mix of upper and lowercase letters, numbers, and special characters. This will make it more difficult for attackers to obtain the password via a brute-force attack.
   
   
2. Implement Kerberos delegation restrictions
   By implementing Kerberos delegation restrictions, you can limit the access that a service account has to resources on the network. This will prevent attackers from leveraging service accounts to gain access to sensitive data.
   
   
3. Use two-factor authentication
   Two-factor authentication (2FA) adds an extra layer of security to your authentication process. By requiring users to enter a code in addition to their password, 2FA can help prevent unauthorized access to your network.
   
   
4. Implement least privilege access
   Implementing the principle of least privilege access is a crucial security measure. This means that users are only given the permissions necessary to perform their job functions. This reduces the risk of unauthorized access to sensitive data and minimizes the impact of a successful attack.
   
   
5. Regularly rotate service account passwords
   By rotating service account passwords on a regular basis, you can minimize the risk of attackers obtaining the password and using it to access your network. Ideally, you should rotate service account passwords every 60 to 90 days.
   
   
6. Use network segmentation
   Network segmentation involves dividing your network into smaller segments, each with its own security measures. This can limit the scope of an attack and prevent attackers from moving laterally across your network.
   
   
7. Regularly audit your network for vulnerabilities
   Regularly auditing your network for vulnerabilities is essential to protect against kerberoasting and other types of attacks. This includes scanning your network for open ports, checking for outdated software and patches, and reviewing your security policies and procedures.

In conclusion, kerberoasting is a serious threat to your organization's security. By implementing these security measures, you can minimize the risk of an attack and protect your assets. Remember, security is an ongoing process, and you must stay vigilant to keep your network safe.