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Ethical Hacking Notes Pdf

IT - Ethical Hacking: Network Security and Penetration Testing . http:// Develop study guides and lecture notes for students' use to review course content and key. Outlining the differences between ethical hackers and malicious hackers. ▷ Examining how the ethical hacking process has come about. ▷ Understanding the. Ethical Hacking Notes - Free download as Word Doc .doc /.docx), PDF File .pdf ), Text File .txt) or read online for free. abt ethical hacking.

Course Description Welcome to my comprehensive course on Ethical Hacking! All the attacks explained in this course are launched against real devices in my lab. The course is structured in a way that will take you through the basics of linux, computer systems, networks and how devices communicate with each other. We will start by talking about how we can exploit these systems to carry out a number of powerful attacks. The course is divided into 4 main sections: In This Course 1. First, you will learn how networks work, basic network terminology and how devices communicate with each other.

In order to operate effectively and legally, an ethical hacker must be informed of the assets that should be protected, potential threat sources, and the extent to which the organization will support an ethical hacker's efforts [2]. Ethical Hacking History Since the 's, the Internet has vastly grown in popularity and computer security has become a major concern for businesses and governments.

Organizations would like to use the Internet to their advantage by utilizing the Internet as a medium for e-commerce, advertising, information distribution and access, as well as other endeavors. However, they remain worried that they may be hacked which could lead to a loss of control of private and personal information regarding the organization, its employees, and its clients. In a search for ways to reduce the fear and worry of being hacked, organizations have come to the realization that an effective way to evaluate security threats is to have independent security exerts attempt to hack into their computer systems.

In the case of computer security, these tiger teams or ethical hackers would use the same tools and techniques as an attacker, but rather than damage the system or steal information, they would evaluate the system security and report the vulnerabilities they found and provide instructions for how to remedy them [3].

From the early days of computers, ethical hacking has been used as an evaluation of system security. However, with the growth of computing and networking in the early 's, computer and network vulnerability studies began to appear outside of the military organization.

In December of , two computer security researchers, Dan Farmer from Elemental Security and Wietse Venema from IBM, suggested that the techniques used by hackers can be used to asses the security of an information system.

They wrote a report that was shared publicly on the Internet which described how they were able to gather enough information to compromise security and they provided several examples of how this information could be gathered and exploited to gain control of a system, and how such an attack could be prevented.

Farmer and Venema realized that the testing that they had performed was complex and time-consuming, so they packaged all of the tools that they had used during their work and developed an easy-to-use application free for download. The SATAN tool provided auditing capability as well as capabilities to provide advice regarding how the user may be able to correct the problems that were discovered. The Ethical Hacking Process Ethical hackers must follow a strict scientific process in order to obtain useable and legal results [4].

Planning Planning is essential for having a successful project. It provides an opportunity to give critical thought to what needs to be done, allows for goals to be set, and allows for a risk assessment to evaluate how a project should be carried out.

There are a large number of external factors that need to be considered when planning to carry out an ethical hack. These factors include existing security policies , culture, laws and regulations, best practices, and industry requirements. Each of these factors play an integral role in the decision making process when it comes to ethical hacking.

The planning phase of an ethical hack will have a profound influence on how the hack is performed and the information shared and collected, and will directly influence the deliverable and integration of the results into the security program.

The planning phase will describe many of the details of a controlled attack. It will attempt to answer questions regarding how the attack is going to be supported and controlled, what the underlying actions that must be performed and who does what, when, where, and for how long.

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Reconnaissance Reconnaissance is the search for freely available information to assist in an attack. This can be as simple as a ping or browsing newsgroups on the Internet in search of disgruntled employees divulging secret information or as messy as digging through the trash to find receipts or letters.

Reconnaissance can include social engineering, tapping phones and networks, or even theft. The search for information is limited only by the extremes at which the organization and ethical hacker are willing to go in order to recover the information they are searching for. The reconnaissance phase introduces the relationship between the tasks that must be completed and the methods that will need to be used in order to protect the organization's assets and information.

Enumeration Enumeration is also known as network or vulnerability discovery.

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It is the act of obtaining information that is readily available from the target's system, applications and networks.

It is important to note that the enumeration phase is often the point where the line between an ethical hack and a malicious attack can become blurred as it is often easy to go outside of the boundaries outlined in the original attack plan. In order to construct a picture of an organization's environment, several tools and techniques are available. These tools and techniques include port scanning and NMap. Although it is rather simple to collect information, it is rather difficult to determine the value of the information in the hands of a hacker.

At first glance, enumeration is simple: take the collected data and evaluate it collectively to establish a plan for more reconnaissance or building a matrix for the vulnerability analysis phase. However, the enumeration phase is where the ethical hacker's ability to make logical deductions plays an enormous role.

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Vulnerability Analysis In order to effectively analyze data, an ethical hacker must employ a logical and pragmatic approach. In the vulnerability analysis phase, the collected information is compared with known vulnerabilities in a practical process.

Information is useful no matter what the source. Any little bit can help in discovering options for exploitation and may possibly lead to discoveries that may not have been found otherwise.

Known vulnerabilities, incidents, service packs, updates, and even available hacker tools help in identifying a point of attack. The Internet provides a vast amount of information that can easily be associated with the architecture and strong and weak points of a system.

Exploitation A significant amount of time is spent planning and evaluated an ethical hack.

Of course, all this planning must eventually lead to some form of attack. The exploitation of a system can be as easy as running a small tool or as intricate as a series of complex steps that must be executed in a particular way in order to gain access.

The exploitation process is broken down into a set of subtasks which can be many steps or a single step in performing the attack. As each step is performed, an evaluation takes place to ensure that the expected outcome is being met.

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Any divergence from the attack plan is classified into two determinations: Expectations: Are the expectations of the exploitation being met or are the results conflicting with the organization's assumptions? Technical: Is the system reacting in an unexpected manner, which is having an impact on the exploitation and the engagement as a whole?

Final Analysis Although the exploitation phase has a number of checks and validations to ensure success, a final analysis is required to categorize the vulnerabilities of the system in terms of their level of exposure and to assist in the derivation of a mitigation plan. The final analysis phase provides a link between the exploitation phase and the creation of a deliverable.

A comprehensive view of the entire attack must exist in order to construct a bigger picture of the security posture of the environment and express the vulnerabilities in a clear and useful manner. The final analysis is part interpretation and part empirical results. Deliverables Deliverables communicate the results of tests in numerous ways. Some deliverables are short and concise, only providing a list of vulnerabilities and how to fix them, while others are long and detailed, providing a list of vulnerabilities with detailed descriptions regarding how they were found, how to exploit them, the implications of having such a vulnerability and how to remedy the situation.

The deliverable phase is a way for an ethical hacker to convey the results of their tests. Recently, ethical hacking has become so commoditized that if a deliverable does not instill fear into the hearts of executives, it could be considered a failure.

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