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Penetration Testing

What is penetration testing?

Penetration testing, commonly referred to as pen testing, is a security assessment conducted by cybersecurity professionals to discover and exploit vulnerabilities within a computer system. The objective of this simulated attack is to pinpoint any weaknesses in the system’s defenses that malicious actors could potentially exploit.
It’s akin to a bank hiring someone to pose as a burglar, attempting to break into their premises and gain access to the vault. If the ‘burglar’ manages to infiltrate the bank or the vault, it provides the bank with invaluable insights into areas where their security measures need strengthening.

Who performs pen tests?

Engaging someone with minimal prior knowledge of the system’s security measures is ideal, as they may uncover blind spots overlooked by the system developers. Therefore, organizations typically enlist outside contractors, commonly known as “ethical hackers,” to conduct these tests. Ethical hackers are tasked with hacking into the system with explicit permission, aiming to enhance security measures.
Numerous ethical hackers possess extensive experience as developers, backed by advanced degrees and certifications in penetration testing. Conversely, some of the most skilled ethical hackers are self-taught individuals. Remarkably, a few even hail from backgrounds as former criminal hackers, now redirecting their expertise towards rectifying security vulnerabilities instead of exploiting them. The optimal candidate for conducting a penetration test can vary significantly based on the target company’s specific requirements and the nature of the pen test they wish to undertake.

What are the types of pen tests?

Open-box pen test
In an open-box test, the hacker is furnished with certain information beforehand about the target company’s security infrastructure.
Closed-box pen test
Also recognized as a ‘single-blind’ test, this approach involves the hacker receiving minimal to no background information, aside from the name of the target company.
Covert pen test
Also referred to as a ‘double-blind’ pen test, this scenario entails minimal awareness within the company about the ongoing pen test, including among IT and security professionals responsible for addressing potential attacks. In covert tests, it’s crucial for the hacker to have comprehensive written details regarding the scope and other specifics of the test beforehand to prevent any potential issues with law enforcement.
External pen test
During an external test, the ethical hacker focuses on evaluating the company’s external-facing technology, including their website and external network servers. In certain instances, the hacker may be restricted from accessing the company’s premises. This could entail executing the attack from a remote location or conducting the test from a parked truck or van nearby.
Internal pen test
During an internal test, the ethical hacker conducts the assessment from within the company’s internal network. This type of test is valuable for assessing the potential damage that a disgruntled employee could inflict from within the company’s firewall.

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How is a typical pen test carried out?

Penetration tests begin with a reconnaissance phase, where an ethical hacker dedicates time to collecting data and information essential for strategizing their simulated attack. Subsequently, the emphasis shifts towards acquiring and retaining access to the target system, necessitating a diverse array of tools.
Tools for conducting attacks encompass software tailored for brute-force attacks or SQL injections. Furthermore, hardware engineered for pen testing purposes includes discreet, compact devices capable of being inserted into a network-connected computer, granting the hacker remote access to the network. Additionally, ethical hackers may employ social engineering tactics to unearth vulnerabilities. This could involve tactics such as dispatching phishing emails to company staff or assuming disguises, such as delivery personnel, to secure physical access to the premises.
To conclude the test, the hacker ensures they cover their tracks effectively. This entails removing any embedded hardware and taking all necessary measures to evade detection, leaving the target system in precisely the same state as they initially encountered it.

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