Hacker and Cracker Descriptions

Table of contents:


Discuss malicious hackers

To understand your role as an ethical hacker, it is important to know the players. Originally, the term hacker was used for a computer enthusiast. A hacker was a person who enjoyed understanding the internal workings of a system, computer, and computer network. Over time, the popular press began to describe hackers as individuals who broke into computers with malicious intent. The industry responded by developing the word cracker, which is short for criminal hacker. The term cracker was developed to describe individuals who seek to compromise the security of a system without permission from an authorized party. With all this confusion over how to distinguish the good guys from the bad guys, the term ethical hacker was coined. An ethical hacker is an individual who performs security tests and other vulnerability assessment activities to help organizations secure their infrastructures. Sometimes ethical hackers are referred to as White Hat Hackers.

Hacker motives and intentions vary. Some hackers are strictly legitimate, whereas others routinely break the law. Let's look at some common categories:

  • Whitehat Hackers These individuals perform ethical hacking to help secure companies and organizations. Their belief is that you must examine your network in the same manner as a criminal hacker to better understand its vulnerabilities.
  • Reformed Blackhat Hackers These individuals often claim to have changed their ways and that they can bring special insight into the ethical hacking methodology.
  • Grayhat Hackers These individuals typically follow the law but sometimes venture over to the darker side of blackhat hacking. It would be unethical to employ these individuals to perform security duties for your organization as you are never quite clear where they stand.

Who Attackers Are

Ethical hackers are up against several individuals in the battle to secure the network. The following list presents some of the more commonly used terms for these attackers:

  • Phreakers The original hackers. These individuals hacked telecommunication and PBX systems to explore the capabilities and make free phone calls. Their activities include physical theft, stolen calling cards, access to telecommunication services, reprogramming of telecommunications equipment, and compromising userids and passwords to gain unauthorized use of facilities, such as phone systems and voice mail.
  • Script/Click Kiddies A term used to describe often younger attackers who use widely available freeware vulnerability assessment tools and hacking tools that are designed for attacking purposes only. These attackers typically do not have any programming or hacking skills and, given the techniques used by most of these tools, can be defended against with the proper security controls and risk mitigation strategies.
  • Disgruntled Employee Employees who have lost respect and integrity for the employer. These individuals might or might not have more skills than the script kiddie. Many times, their rage and anger blind them. They rank as a potentially high risk because they have insider status, especially if access rights and privileges were provided or managed by the individual.
  • Whackers Whackers are typically newbies who focus their limited skills and abilities on attacking wireless LANs and WANs.
  • Software Cracker/Hacker Individuals who have skills in reverse engineering software programs and, in particular, licensing registration keys used by software vendors when installing software onto workstations or servers. Although many individuals are eager to partake of their services, anyone who downloads programs with cracked registration keys are breaking the law and can be a greater potential risk and subject to malicious code and malicious software threats that might have been injected into the code.
  • Cyber-Terrorists/Cyber-Criminals An increasing category of threat that can be used to describe individuals or groups of individuals who are typically funded to conduct clandestine or espionage activities on governments, corporations, and individuals in an unlawful manner. These individuals are typically engaged in sponsored acts of defacement; DoS/DDoS attacks identify theft, financial theft, or worse, compromising critical infrastructures in countries, such as nuclear power plants, electric plants, water plants, and so on.
  • System Cracker/Hacker Elite hackers who have specific expertise in attacking vulnerabilities of systems and networks by targeting operating systems. These individuals get the most attention and media coverage because of the globally affected viruses, worms, and Trojans that are created by System Crackers/Hackers. System Crackers/Hackers perform interactive probing activities to exploit security defects and security flaws in network operating systems and protocols.

Now that you have an idea who the legitimate security professionals are up against, let's briefly discuss some of the better known crackers and hackers.

Hacker and Cracker History

The well-known hackers of today grew out of the phone phreaking activities of the 1960s. In 1969, Mark Bernay, also known as "The Midnight Skulker," wrote a computer program that allowed him to read everyone else's ID and password at the organization where he worked. Although he was eventually fired, no charges were ever filed, as computer crime was so new, there were no laws against it.

Computer innovators include

  • Steve Wozniak and Steve Jobs Members of the Homebrew Computer Club of Palo Alto. John Draper was also a member of this early computer club. Wozniak and Jobs went on to become co-founders of Apple Computer.
  • Dennis Ritchie and Ken Thompson While not criminal hackers, their desire for discovery led to the development of UNIX in 1969 while working at Bell Labs.

Well-known hackers and phreakers include

  • John Draper Dubbed "Captain Crunch" for finding that a toy whistle shipped in boxes of Captain Crunch cereal had the same frequency as the trunking signal of AT&T, 2,600Hz. This discovery was made with the help of Joe Engressia. Although Joe was blind, he could whistle into a phone and produce a perfect 2,600Hz frequency. This tone was useful for placing free long distance phone calls.
  • Mark Abene Known as Phiber Optik. Mark helped form the "Masters of Deception" in 1990. Before being arrested in 1992, they fought an extended battle with "Legion of Doom."
  • Kevin Poulsen Known as Dark Dante. Kevin took over all phones in Los Angeles in 1990 to ensure victory in a phone "call-in contest," for a Porsche 944. He was later arrested.
  • Robert Morris The son of a chief scientist at the NSA. Morris accidentally released the "Morris Worm" in 1988 from a Cornell University lab. This is now widely seen as the first release of a worm onto the Internet.
  • Kevin Mitnick Known as "Condor," Mitnick was the first hacker to hit the FBI Most Wanted list. Broke into such organizations as Digital Equipment Corp., Motorola, Nokia Mobile Phones, Fujitsu, and others. He was arrested in 1994 and has now been released and works as a legitimate security consultant.
  • Vladimir Levin A Russian hacker who led a team of hackers who siphoned off $10 million from Citibank and transferred the money to bank accounts around the world. Levin eventually stood trial in the United States and was sentenced to three years in prison. Authorities recovered all but $400,000.00 of the stolen money.
  • Adrian Lamo Known as the "Homeless Hacker" because of his transient lifestyle. Lamo spent his days squatting in abandoned buildings and traveling to Internet cafes, libraries, and universities to exploit security weaknesses in high-profile company networks, such as Microsoft, NBC, and the New York Times. He was eventually fined and prosecuted for the New York Times hack.

Although this list does not include all the hackers, crackers, and innovators of the computer field, it should give you an idea of some of the people who have made a name for themselves in this industry. Let's now talk more about ethical hackers.

Ethical Hackers

Part I: Exam Preparation

The Business Aspects of Penetration Testing

The Technical Foundations of Hacking

Footprinting and Scanning

Enumeration and System Hacking

Linux and Automated Security Assessment Tools

Trojans and Backdoors

Sniffers, Session Hijacking, and Denial of Service

Web Server Hacking, Web Applications, and Database Attacks

Wireless Technologies, Security, and Attacks

IDS, Firewalls, and Honeypots

Buffer Overflows, Viruses, and Worms

Cryptographic Attacks and Defenses

Physical Security and Social Engineering

Part II: Final Review

Part III: Appendixes

Appendix A. Using the ExamGear Special Edition Software

Certified Ethical Hacker Exam Prep
Certified Ethical Hacker Exam Prep
ISBN: 0789735318
EAN: 2147483647
Year: 2007
Pages: 247
Authors: Michael Gregg

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