SlideShare a Scribd company logo
10 Best Hackers The World Has Ever Known
16-year-old black hat hacker Jonathan James, became the first juvenile imprisoned for cybercrime. James gained his
notoriety by implementing a series of successful intrusions into various systems.
In an anonymous PBS interview, he professes, “I was just looking around, playing around. What was fun for me was a
challenge to see what I could pull off.”
In 2002, an exceptionally odd message appeared on a US Army computer screen: “Your security system is crap,” it read. “I am
Solo. I will continue to disrupt at the highest levels.”
It was later identified as the work of Scottish systems administrator, Gary McKinnon, who was accused of perpetrating the
“biggest military computer hack of all time”.
He is accused of hacking into 97 United States military and NASA computers over a 13-month period between, using the name
‘Solo’.
Adrian Lamo is a Colombian-American threat analyst and hacker. He used coffee shops, libraries and internet cafés as his
locations for hacking.
Apart from being the homeless hacker, Lamo is widely-known for breaking into a series of high-profile computer
networks, which include The New York Times, Microsoft, Yahoo!, and MCI WorldCom.
In 2002, he added his name to the The New York Times’ internal database of expert sources and utilized LexisNexis
account to conduct research on high-profile subjects.
George Francis Hotz, alias geohot, or simply mil, is an American hacker known for unlocking the iPhone, allowing the
phone to be used with other wireless carriers, contrary to AT&T and Apple’s intent.
Additionally, he developed the limera1n jailbreak tool, which used his limera1n bootrom exploit.
In June, 2007, Hotz became the first person to carrier unlock an iPhone. According to Hotz’s blog, he traded his 2nd
unlocked 8 GB iPhone to Terry Daidone, the founder of Certicell, for a Nissan 350Z and three 8 GB iPhones.
Hotz said he wanted to give the iPhones to the other members of the team who created the hack with him. His name
will forever be associated with the April 2011 PlayStation breach
A self-proclaimed “hacker poster boy,” Mitnick went through a highly publicized pursuit by authorities. His mischief
was hyped by the media but his actual offenses may be less notable than his notoriety suggests.
The Department of Justice describes him as “the most wanted computer criminal in United States history.” His
exploits were detailed in two movies: Freedom Downtime and Takedown.
According to the U.S. Department of Justice, Mitnick gained unauthorized access to dozens of computer networks
while he was a fugitive. He used cloned cellular phones to hide his location and, among other things, copied
valuable proprietary software from some of the country’s largest cellular telephone and computer companies.
Mitnick also intercepted and stole computer passwords, altered computer networks, and broke into and read private
e-mail.
A high school student from West Island, Michael Demon Calce best known as “MafiaBoy”. He launched a series of
widely known denial-of-service attacks against large commercial websites, including Yahoo!, Amazon.com, Dell,
eBay, and CNN.
He hacked Yahoo! when it was still the web’s leading search engine and caused it to shutdown for about an hour.
Robert Tappan Morris is an American computer scientist, best known for creating the Morris Worm in 1988. That
was considered the first computer worm on the Internet.
Also he was the first person convicted under the Computer Fraud and Abuse Act.
Morris created the worm while he was a graduate student at Cornell University. He released the worm from MIT
to conceal the fact that it actually originated from Cornell. The worm took down one-tenth of the Internet,
crippling 6,000 plus computer systems. It didn’t take long for the police to track him down.
The notorious ’80s black hat hacker, Kevin Poulsen, also known as Dark Dante, gained recognition for his hack of
LA radio’s KIIS-FM phone lines, which earned him a brand new Porsche, among other items. Law enforcement
dubbed him “the Hannibal Lecter of computer crime.”
Authorities began to pursue Poulsen after he hacked into a federal investigation database. During this pursuit, he
further drew the ire of the FBI by hacking into federal computers for wiretap information.
His hacking specialty, however, revolved around telephonesHowever, since serving time, Poulsen has worked as a
journalist and is now a senior editor for Wired News.
Poulsen’s most note-worthy article details his work on identifying 744 sex offenders with MySpace profiles.
Albert Gonzalez is a computer hacker and computer criminal who is accused of masterminding the combined credit
card theft and subsequent reselling of more than 170 million card and ATM numbers from 2005 through 2007—the
biggest such fraud in history.
Gonzalez’s team used SQL injection techniques to create malware backdoors on several corporate systems in order
to launch packet-sniffing (specifically, ARP Spoofing) attacks, allowing him to steal computer data from internal
corporate networks.
When he was arrested, authorities seized $1.6 million in cash including $1.1 million found in plastic bags placed in a
three-foot drum which had been buried in his parents’ backyard. On March 25, 2010, Gonzalez was sentenced to
20 years in federal prison.
Vladimir Levin is a Russian-born Jewish individual famed for his involvement in the attempt to fraudulently
transfer US$10.7 million via Citibank’s computers.
However, his career as a hacker was only short lived, with a capture, imprisonment and recovery of all but
$400,000 of the original $10 million.
During Levin’s 1997 trial in the United States, he was said to have coordinated the first ever internet bank raid.
The truth is Levin’s ability to transfer Citibank client funds to his own accounts was possible through stolen
account numbers and PINs.
Levin’s scam was a simple interception of clients’ calls while recording the punched in account numbers.
Famous hackers

More Related Content

DOCX
Comparison between computers of past and present
PPT
Cybercrime presentation
PPT
Freedom of speech
PPT
History of computer hardware
PPTX
Digital investigation
PDF
GDPR Preparing for-the-gdpr-12-steps
PDF
Cyber Crimes: The Transformation of Crime in the Information Age
PPTX
Cyber Crime
Comparison between computers of past and present
Cybercrime presentation
Freedom of speech
History of computer hardware
Digital investigation
GDPR Preparing for-the-gdpr-12-steps
Cyber Crimes: The Transformation of Crime in the Information Age
Cyber Crime

What's hot (20)

PDF
Basics of Computer hardware and Software
PPTX
Computer ethics
PDF
20CS024 Ethics in Information Technology
PPTX
Corrections chapter 1 ppt
PPTX
Cyber Crime
PPTX
Booting of Computer System
PPTX
Internet - History, present and future
PPTX
John wayne gacy
PPTX
Cybercrime & Security
DOCX
Timeline History of the Internet
PDF
Questioned Documents First Chapter
PPTX
Introduction to criminal justice chapter 1
DOCX
Cyber Law With case studies
PPTX
Cyber fraud
PDF
Computer Security Threats
PPTX
Computer Forensic Softwares
PPTX
Cyber crime & security
PPT
Computer crime
PDF
physical-security (1).pdf
PPTX
Basics of Computer hardware and Software
Computer ethics
20CS024 Ethics in Information Technology
Corrections chapter 1 ppt
Cyber Crime
Booting of Computer System
Internet - History, present and future
John wayne gacy
Cybercrime & Security
Timeline History of the Internet
Questioned Documents First Chapter
Introduction to criminal justice chapter 1
Cyber Law With case studies
Cyber fraud
Computer Security Threats
Computer Forensic Softwares
Cyber crime & security
Computer crime
physical-security (1).pdf

Similar to Famous hackers (20)

PPTX
Powerpoint
PPTX
Computer Hacking by Rudy
PDF
Computer Security,Types of Hackers,Installation of Kali Linux, Common Keywords
PPTX
History's most notorious hackers
PPT
Top 10 most famous hackers of all time
DOCX
Top 10 Cyber Crimes in the World till now
PDF
Report on Hacking
PPT
H A C K I N Gjk,K
PPSX
Famous hackers group
PDF
article cybersecurity must B2B metaverse
PPT
C|EH Introduction
PDF
Digital footprints (preview)
PPTX
Hacking.pptx
PDF
5 biggest cyber attacks and most famous hackers
PPTX
Risk base approach for security management fujitsu-fms event 15 aug 2011
PPTX
2014 GRC Conference in West Palm Beach-Moderated by Sonia Luna
PPTX
Sit presentation - Hacking
PPT
Ethical hacking presentation_october_2006
PPT
Hacking And Its Prevention
Powerpoint
Computer Hacking by Rudy
Computer Security,Types of Hackers,Installation of Kali Linux, Common Keywords
History's most notorious hackers
Top 10 most famous hackers of all time
Top 10 Cyber Crimes in the World till now
Report on Hacking
H A C K I N Gjk,K
Famous hackers group
article cybersecurity must B2B metaverse
C|EH Introduction
Digital footprints (preview)
Hacking.pptx
5 biggest cyber attacks and most famous hackers
Risk base approach for security management fujitsu-fms event 15 aug 2011
2014 GRC Conference in West Palm Beach-Moderated by Sonia Luna
Sit presentation - Hacking
Ethical hacking presentation_october_2006
Hacking And Its Prevention

More from Ashokkumar Gnanasekar (7)

PPSX
Practical demo recon os footprinting
PPSX
PPSX
Ethics and cyber bullying
PPSX
Ethics and compliances
PPSX
Cyber security awareness presentation
PPSX
Cyber Security Worlshop Agenda
PDF
ECC-Certificate
Practical demo recon os footprinting
Ethics and cyber bullying
Ethics and compliances
Cyber security awareness presentation
Cyber Security Worlshop Agenda
ECC-Certificate

Recently uploaded (20)

PDF
KodekX | Application Modernization Development
PDF
NewMind AI Weekly Chronicles - August'25 Week I
PPT
Teaching material agriculture food technology
PDF
Electronic commerce courselecture one. Pdf
DOCX
The AUB Centre for AI in Media Proposal.docx
PDF
Empathic Computing: Creating Shared Understanding
PDF
Diabetes mellitus diagnosis method based random forest with bat algorithm
PPTX
PA Analog/Digital System: The Backbone of Modern Surveillance and Communication
PDF
NewMind AI Monthly Chronicles - July 2025
PDF
Machine learning based COVID-19 study performance prediction
PPTX
KOM of Painting work and Equipment Insulation REV00 update 25-dec.pptx
PDF
Agricultural_Statistics_at_a_Glance_2022_0.pdf
PDF
Modernizing your data center with Dell and AMD
PPTX
A Presentation on Artificial Intelligence
PDF
Reach Out and Touch Someone: Haptics and Empathic Computing
PDF
Network Security Unit 5.pdf for BCA BBA.
PDF
Per capita expenditure prediction using model stacking based on satellite ima...
PDF
Unlocking AI with Model Context Protocol (MCP)
PDF
Peak of Data & AI Encore- AI for Metadata and Smarter Workflows
PDF
CIFDAQ's Market Insight: SEC Turns Pro Crypto
KodekX | Application Modernization Development
NewMind AI Weekly Chronicles - August'25 Week I
Teaching material agriculture food technology
Electronic commerce courselecture one. Pdf
The AUB Centre for AI in Media Proposal.docx
Empathic Computing: Creating Shared Understanding
Diabetes mellitus diagnosis method based random forest with bat algorithm
PA Analog/Digital System: The Backbone of Modern Surveillance and Communication
NewMind AI Monthly Chronicles - July 2025
Machine learning based COVID-19 study performance prediction
KOM of Painting work and Equipment Insulation REV00 update 25-dec.pptx
Agricultural_Statistics_at_a_Glance_2022_0.pdf
Modernizing your data center with Dell and AMD
A Presentation on Artificial Intelligence
Reach Out and Touch Someone: Haptics and Empathic Computing
Network Security Unit 5.pdf for BCA BBA.
Per capita expenditure prediction using model stacking based on satellite ima...
Unlocking AI with Model Context Protocol (MCP)
Peak of Data & AI Encore- AI for Metadata and Smarter Workflows
CIFDAQ's Market Insight: SEC Turns Pro Crypto

Famous hackers

  • 1. 10 Best Hackers The World Has Ever Known
  • 2. 16-year-old black hat hacker Jonathan James, became the first juvenile imprisoned for cybercrime. James gained his notoriety by implementing a series of successful intrusions into various systems. In an anonymous PBS interview, he professes, “I was just looking around, playing around. What was fun for me was a challenge to see what I could pull off.”
  • 3. In 2002, an exceptionally odd message appeared on a US Army computer screen: “Your security system is crap,” it read. “I am Solo. I will continue to disrupt at the highest levels.” It was later identified as the work of Scottish systems administrator, Gary McKinnon, who was accused of perpetrating the “biggest military computer hack of all time”. He is accused of hacking into 97 United States military and NASA computers over a 13-month period between, using the name ‘Solo’.
  • 4. Adrian Lamo is a Colombian-American threat analyst and hacker. He used coffee shops, libraries and internet cafés as his locations for hacking. Apart from being the homeless hacker, Lamo is widely-known for breaking into a series of high-profile computer networks, which include The New York Times, Microsoft, Yahoo!, and MCI WorldCom. In 2002, he added his name to the The New York Times’ internal database of expert sources and utilized LexisNexis account to conduct research on high-profile subjects.
  • 5. George Francis Hotz, alias geohot, or simply mil, is an American hacker known for unlocking the iPhone, allowing the phone to be used with other wireless carriers, contrary to AT&T and Apple’s intent. Additionally, he developed the limera1n jailbreak tool, which used his limera1n bootrom exploit. In June, 2007, Hotz became the first person to carrier unlock an iPhone. According to Hotz’s blog, he traded his 2nd unlocked 8 GB iPhone to Terry Daidone, the founder of Certicell, for a Nissan 350Z and three 8 GB iPhones. Hotz said he wanted to give the iPhones to the other members of the team who created the hack with him. His name will forever be associated with the April 2011 PlayStation breach
  • 6. A self-proclaimed “hacker poster boy,” Mitnick went through a highly publicized pursuit by authorities. His mischief was hyped by the media but his actual offenses may be less notable than his notoriety suggests. The Department of Justice describes him as “the most wanted computer criminal in United States history.” His exploits were detailed in two movies: Freedom Downtime and Takedown. According to the U.S. Department of Justice, Mitnick gained unauthorized access to dozens of computer networks while he was a fugitive. He used cloned cellular phones to hide his location and, among other things, copied valuable proprietary software from some of the country’s largest cellular telephone and computer companies. Mitnick also intercepted and stole computer passwords, altered computer networks, and broke into and read private e-mail.
  • 7. A high school student from West Island, Michael Demon Calce best known as “MafiaBoy”. He launched a series of widely known denial-of-service attacks against large commercial websites, including Yahoo!, Amazon.com, Dell, eBay, and CNN. He hacked Yahoo! when it was still the web’s leading search engine and caused it to shutdown for about an hour.
  • 8. Robert Tappan Morris is an American computer scientist, best known for creating the Morris Worm in 1988. That was considered the first computer worm on the Internet. Also he was the first person convicted under the Computer Fraud and Abuse Act. Morris created the worm while he was a graduate student at Cornell University. He released the worm from MIT to conceal the fact that it actually originated from Cornell. The worm took down one-tenth of the Internet, crippling 6,000 plus computer systems. It didn’t take long for the police to track him down.
  • 9. The notorious ’80s black hat hacker, Kevin Poulsen, also known as Dark Dante, gained recognition for his hack of LA radio’s KIIS-FM phone lines, which earned him a brand new Porsche, among other items. Law enforcement dubbed him “the Hannibal Lecter of computer crime.” Authorities began to pursue Poulsen after he hacked into a federal investigation database. During this pursuit, he further drew the ire of the FBI by hacking into federal computers for wiretap information. His hacking specialty, however, revolved around telephonesHowever, since serving time, Poulsen has worked as a journalist and is now a senior editor for Wired News. Poulsen’s most note-worthy article details his work on identifying 744 sex offenders with MySpace profiles.
  • 10. Albert Gonzalez is a computer hacker and computer criminal who is accused of masterminding the combined credit card theft and subsequent reselling of more than 170 million card and ATM numbers from 2005 through 2007—the biggest such fraud in history. Gonzalez’s team used SQL injection techniques to create malware backdoors on several corporate systems in order to launch packet-sniffing (specifically, ARP Spoofing) attacks, allowing him to steal computer data from internal corporate networks. When he was arrested, authorities seized $1.6 million in cash including $1.1 million found in plastic bags placed in a three-foot drum which had been buried in his parents’ backyard. On March 25, 2010, Gonzalez was sentenced to 20 years in federal prison.
  • 11. Vladimir Levin is a Russian-born Jewish individual famed for his involvement in the attempt to fraudulently transfer US$10.7 million via Citibank’s computers. However, his career as a hacker was only short lived, with a capture, imprisonment and recovery of all but $400,000 of the original $10 million. During Levin’s 1997 trial in the United States, he was said to have coordinated the first ever internet bank raid. The truth is Levin’s ability to transfer Citibank client funds to his own accounts was possible through stolen account numbers and PINs. Levin’s scam was a simple interception of clients’ calls while recording the punched in account numbers.

Editor's Notes

  • #3: Also known as “c0mrade,” James committed suicide using a gun, On May 18, 2008, at the age of 25. His suicide was apparently motivated by the belief that he would be prosecuted for crimes he had not committed. “I honestly, honestly had nothing to do with TJX,” James wrote in his suicide note, “I have no faith in the ‘justice’ system. Perhaps my actions today, and this letter, will send a stronger message to the public. Either way, I have lost control over this situation, and this is my only way to regain control.” James’ major intrusions targeted high-profile organizations such as NASA and the Department of Defense. He cracked into NASA computers, stealing software worth approximately $1.7 million. He also hacked into the Defense Threat Reduction Agency and intercepted over 3,000 highly secretive messages passing to and from the DTRA employees, while collecting many usernames and passwords.
  • #4: The US authorities claim he deleted critical files from operating systems, which shut down the United States Army’s Military District of Washington network of 2,000 computers for 24 hours. After the September 11 attacks in 2001, he deleted weapons logs at the Earle Naval Weapons Station, rendering its network of 300 computers inoperable and paralyzing munitions supply deliveries for the US Navy’s Atlantic Fleet. He is also accused of copying data, account files and passwords onto his own computer. In November 2002, McKinnon was indicted by a federal grand jury in the Eastern District of Virginia. The indictment contained seven counts of computer-related crime, each of which carried a potential ten-year jail sentence. The court had recommended that McKinnon be apprehended to the United States to face charges of illegally accessing 97 computers, causing a total of $700,000 in damage. Even more interesting are McKinnon’s motives for the large scale hackings, which he claims were in search of information on UFOs. He believed the US government was hiding such information in its military computers.
  • #5: For his intrusion at The New York Times, Lamo was ordered to pay approximately $65,000 in damages and was sentenced to six months house arrest at his parents’ home, with an additional two years of probation. In June 2010, Lamo disclosed the name of Bradley Manning to U.S. Army authorities as the source of the July 12, 2007 Baghdad airstrike video leak to Wikileaks. Lamo is presently working as a threat analyst and donates his time and skills to a Sacramento-based nonprofit organization.
  • #6: . Being one of the first hackers ever to jailbreak the Sony PlayStation 3, Hotz found himself in the midst of a very relentless, public and messy court battle with Sony – perhaps worsened by Hotz’s public release of his jail breaking methods. In a stated retaliation to Sony’s gap of the unstated rules of jail breaking – never prosecute – the hacker group Anonymous attacked Sony in what would be the dubbed as the most costly security break of all time to date. At the end of April 2011, Hackers broke into the PlayStation Network and stole personal information of some 77 million users. However, Hotz denied any responsibility for the attack, and added “Running homebrew and exploring security on your devices is cool; hacking into someone else’s server and stealing databases of user info. is not cool.”
  • #7: Mitnick gained unauthorized access to his first computer network in 1979, at 16, when a friend gave him the phone number for the Ark, the computer system Digital Equipment Corporation (DEC) used for developing their RSTS/E operating system software. He broke into DEC’s computer network and copied their software, a crime he was charged with and convicted of in 1988.
  • #8: Like many hackers, Calce exploited websites primarily for pride and establishing dominance for himself and his cybergroup, TNT. In 2001, the Montreal Youth Court sentenced Calce to eight months of open custody, one year of probation, restricted use of the Internet, and a minimal fine.
  • #9: Due in part to the need for social acceptance that seems to be common among many young hackers, Morris made the fault of chatting about his worm for months before its release on the Internet. Morris claimed it was just a stunt, and added that he truly regretted causing $15 million worth of damage: the estimated amount of carnage his worm left behind. Morris was one of the first to be tried and convicted under the Computer Fraud and Abuse Act . In December, 1990, was sentenced to three years of probation, 400 hours of community service, a fine of $10,050, and the costs of his supervision.
  • #10: . Poulsen’s most famous hack, KIIS-FM, was accomplished by taking over all of the station’s phone lines. In a related feat, Poulsen also “reactivated old Yellow Page escort telephone numbers for an acquaintance who then ran a virtual escort agency.” Later, when his photo came up on the show Unsolved Mysteries, 1-800 phone lines for the program crashed. Ultimately, Poulsen was captured in a supermarket and served a sentence of five years, which was the longest sentence ever given for hacking at the time.