What is a common post-exploitation technique used after successfully exploiting a vulnerability in Metasploitable3?1.0 MarksData exfiltrationPrivilege escalationNone of the aboveAccount creationPersistence

The common post-exploitation technique used after successfully exploiting a vulnerability in Metasploitable3 is Privilege escalation.

Here are the steps:

1. Identify Vulnerability: The first step is to identify a vulnerability in the system. This can be done using various tools and techniques like scanning, fuzzing, etc.

2. Exploit Vulnerability: Once a vulnerability is identified, the next step is to exploit it. This is done using an exploit that is designed to take advantage of the vulnerability.

3. Gain Access: After the vulnerability is exploited, the attacker gains access to the system. This could be in the form of shell access, remote access, etc.

4. Privilege Escalation: Once the attacker has gained access, the next step is to escalate privileges. This is done to gain higher-level permissions, like admin rights, on the system. This allows the attacker to have more control over the system.

5. Maintain Access: The final step is to maintain access. This is done using various techniques like creating backdoors, installing rootkits, etc. This allows the attacker to maintain access to the system even after the initial exploit is fixed.

So, the correct answer is Privilege escalation.