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Ethical Hacking: How Do Hackers Use Persistence Mechanisms to Survive System Restarts?

What Is a Persistent Payload and How Does It Maintain Access After a Reboot?

Explore the concept of a persistent payload in Metasploit and ethical hacking. Learn how these mechanisms ensure continuous access to a target system even after a reboot by modifying startup processes, services, or registry keys.

Question

Which type of payload maintains continuous access even after a system reboot?

A. Staged payload
B. Persistent payload
C. Inline payload
D. Reverse TCP payload

Answer

B. Persistent payload

Explanation

Persistent payloads are designed to re-establish access even after reboot.

A persistent payload refers to a payload that has been installed on a target system with a mechanism that allows it to automatically execute again after the system is rebooted. Persistence is not a type of payload itself (like staged or inline) but rather a characteristic or a goal achieved through post-exploitation techniques. After gaining initial access with a payload like Meterpreter, an attacker will run scripts or modules that modify the target’s system configuration. These modifications ensure that the payload or a stager for it is launched every time the system starts up.

Common persistence techniques include:

  • Creating a new service that runs at boot.
  • Adding a program to the startup folder.
  • Creating a scheduled task.
  • Modifying registry keys like HKCU\Software\Microsoft\Windows\CurrentVersion\Run.

The other options refer to different aspects of payloads:

A. Staged payload: This describes a delivery method where a small initial “stager” connects back to the attacker and downloads the rest of the larger, more functional payload. This is about efficiency, not persistence.

C. Inline payload: Also called a stageless payload, this is a self-contained payload that includes all necessary code in a single package. It is about delivery method, not persistence.

D. Reverse TCP payload: This describes a communication method where the compromised target initiates a connection back to the attacker’s machine. This is useful for bypassing firewalls but has no bearing on what happens after a reboot.

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