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Hector Monsegur

b. 1983

American computer hacker and co-founder of the hacking group LulzSec

Security hacker
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About Hector Monsegur

Born 1983. Hector Monsegur is an American security hacker, known for LulzSec.

Hector Xavier Monsegur (born 1983), known also by the online pseudonym Sabu (pronounced Sə'buː, Sæ'buː), is an American computer hacker and co-founder of the hacking group LulzSec. Monsegur became an informant for the FBI, working with the agency for over ten months to aid them in identifying the other hackers from LulzSec and related groups while facing a sentence of 124 years in prison. LulzSec intervened in the affairs of organizations such as News Corporation, Stratfor, UK and American law enforcement bodies and Irish political party Fine Gael.

Sabu featured prominently in the group's published IRC chats, and claimed to support the "Free Topiary" campaign. The Economist referred to Sabu as one of LulzSec's six core members.

Early life, family and formal education Hector Monsegur was born in New York to a 16-year-old father who raised him with his 40-year-old grandmother. Following the arrest of his father and his aunt for selling heroin, Monsegur moved to the Riis Houses (also known as the projects) in New York City with his grandmother.

At a young age, Monsegur became interested in computers.

While attending Washington Irving High School, Monsegur was reprimanded by a security guard for bringing a screwdriver to school to help fix their computer system. Feeling insulted, he sent several complaints to the school administration. His complaints were deemed "threatening," and he was expelled. After this incident, he discontinued his formal education.

Hacking career An early experience with hacking was at age 14 when a Puerto Rican person was accidentally killed by the Marine Corps when they started bombing outside the test range on the island of Vieques, Puerto Rico. In response, Monsegur defaced various websites with messages protesting the US government's treatment of Puerto Ricans. On one site he included the line "Hello, I am Sabu, no one special for now."

Sabu was identified by rival hacker group Backtrace Security as on March 11, 2011, in "Namshub," a PDF publication (named after the Sumerian word for "incantation"). Backtrace Security was a group of ex-Anonymous members who had grown critical of vigilante hacktivism. One member of the group explained their motives by stating, "One cannot fight for justice and democracy by using unjust, anti-democratic tactics." Backtrace Security had found his identity through an IRC chatlog in which Sabu accidentally posted a link to his personal website. A few days after that bail hearing, Monsegur entered a guilty plea to 12 criminal charges, including multiple counts of conspiracy to engage in computer hacking, computer hacking in furtherance of fraud, conspiracy to commit access device fraud, conspiracy to commit bank fraud and aggravated identity theft. He faced up to 124 years in prison. The FBI provided its own servers for the hacking to take place. The FBI attempted to use Monsegur to entrap Nadim Kobeissi, author of the secure communication software Cryptocat, but without success.

Monsegur maintained his pretense until March 6, 2012, even tweeting his "opposition" to the federal government until the very last minute.

A court filing made by prosecutors in late May 2014 revealed Monsegur had prevented 300 cyber-attacks in the three years since 2011, including planned attacks on NASA, the U.S. military and media companies.

Monsegur served 7 months in prison after his arrest but had been free since then while awaiting sentencing. At his sentencing on May 27, 2014, he was given "time served" for co-operating with the FBI and set free under one year of probation.

Post-prison career After his release from prison, Monsegur worked as a white hat hacker doing pentesting.

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Important facts

Birth century
Occupation
Security hacker
Nationality
Known for
LulzSec
Education
Washington Irving High School
Also known as
Sabu, Hector Xavier Monseguro, Hector Xavier Monsegur

People in Hector Monsegur's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Hector Monsegur's

Frequently asked questions

Who is Hector Monsegur?

American computer hacker and co-founder of the hacking group LulzSec

When was Hector Monsegur born?

Hector Monsegur was born on 13 October 1983.

What is Hector Monsegur's occupation?

Hector Monsegur is a security hacker.

What is Hector Monsegur known for?

Hector Monsegur is known for LulzSec.

What nationality is Hector Monsegur?

Hector Monsegur is American.

Sources & further reading

· Wikipedia: Hector Monsegur

· Wikidata: Q3206924

· DBpedia: Hector Monsegur

Cite this page

APA: Biography.guide. (2026). Hector Monsegur. https://biography.guide/hector-monsegur/

MLA: "Hector Monsegur." Biography.guide, https://biography.guide/hector-monsegur/.

Chicago: "Hector Monsegur." Biography.guide. https://biography.guide/hector-monsegur/.

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