![]() ![]() We have now been able to successfully set up persistent access via SSH keys and consequently mitigating any future authentication failures caused by changed passwords. In this case, we will use the default options. This can be done by running the following command: ssh-keygenĪs highlighted in the following screenshot, this will prompt you to specify the storage location for the public and private keys that will be generated, as well as a passphrase for the SSH key. The first step will involve generating the SSH key-pair, this will need to be done on your Kali VM as this is the system we will be using for authentication via SSH. In order to perform this technique, you need to have obtained initial access to the target system and you will require “root” privileges if you wish to modify the SSH configuration file. Note: This technique requires Public Key Authentication to be enabled in the SSH configuration file, more information see SSH add keys This persistence technique will help maintain access to the target system if the user account passwords have been changed, as this is quite a common practice in companies that have password security policies in place. The first persistence technique we will be exploiting is the process of generating and using SSH key-based authentication as opposed to password-based authentication. Note: Some persistence techniques will require “root” privileges in order to be executed successfully. Our objective is to establish persistence on the Linux target after we have obtained an initial foothold. The following is a list of key techniques and sub techniques that we will be exploring: The techniques outlined under the Persistence tactic provide us with a clear and methodical way of obtaining establishing persistence on the target system. Gaining an initial foothold is not enough, you need to set up and maintain persistent access to your targets. Techniques used for persistence include any access, action, or configuration changes that let them maintain their foothold on systems, such as replacing or hijacking legitimate code or adding startup code. ![]() Persistence consists of techniques that adversaries use to keep access to systems across restarts, changed credentials, and other interruptions that could cut off their access. Note: The techniques and tools utilized in this document were performed on Kali Linux 2021.2 Virtual Machine MITRE ATT&CK Persistence Techniques The following is a list of recommended technical prerequisites that you will need in order to get the most out of this course:įamiliarity with Linux system administration.įamiliarity with penetration testing concepts and life-cycle. The demonstrations outlined in this document were performed against a vulnerable Linux VM that has been configured to teach you the process of exploitation and privilege escalation. In order to follow along with the tools and techniques utilized in this document, you will need to use one of the following offensive Linux distributions: The use of other domains or IP addresses is prohibited. All labs and tests are to be conducted within the parameters outlined within the text. ![]()
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