This is a partial list of notable hacker groups.
Anonymous, originating in 2003, Anonymous was created as a group for people who fought for the right to privacy.
Bangladesh Black Hat Hackers, founded in 2012.
Cozy Bear, a Russian hacker group believed to be associated with one or more intelligence agencies of Russia.
Croatian Revolution Hackers, a now-defunct group of Croatian hackers credited with one of the largest attacks to have occurred in the Balkans.
Cult of the Dead Cow, also known as cDc or cDc Communications, is a computer hacker and DIY media organization founded in 1984 in Lubbock, Texas.
Cyber Partisans, a Belarusian hacktivist group that emerged in 2020, that performed attacks on the Belarusian government and governmental agencies.
DarkSide, a cybercriminal hacking group, believed to be based in Eastern Europe, that targets victims using ransomware and extortion.
DCLeaks, claims to be a group of "American hacktivists (though indicted individuals were found to be in Russia) who respect and appreciate freedom of speech, human rights and government of the people."
Decocidio is an anonymous, autonomous collective of hacktivists who are part of Earth First!, a radical environmental protest organization, and adheres to Climate Justice Action.
Derp, a hacker group that attacked several game sites in late 2013.
Digital DawgPound (DDP) The DDP was founded and named by StankDawg.
Equation Group, suspected to be the offensive operations wing of the U.S. National Security Agency.
Fancy Bear, a Russian cyberespionage group.
Ghost Squad Hackers, or by the abbreviation "GSH" is a politically motivated hacking team established in 2015.
Rocket Kitten or the Rocket Kitten Group is a hacker group thought to be linked to the Iranian government. Formed in 2010 by the hacker personas "Cair3x" and "HUrr!c4nE!".
Global kOS was a grey hat (leaning black hat) computer hacker group active from 1996 through 2000.
globalHell was a group of hackers, composed of about 60 individuals. The group disbanded in 1999 when 12 members were prosecuted for computer intrusion and 30 for lesser offenses.
Goatse Security (GoatSec) is a loose-knit, nine-person grey hat hacker group that specializes in uncovering security flaws.
Hackweiser is an underground hacking group and hacking magazine founded in 1999.
Hafnium Possibly with Chinese associations, responsible for the 2021 Microsoft Exchange Server data breach.
Honker Union is a group known for hacktivism, mainly present in Mainland China, whose members launched a series of attacks on websites in the United States, mostly government-related sites.
IT Army of Ukraine is a volunteer cyberwarfare organisation created amidst the 2022 Russian invasion of Ukraine.
Killnet is a pro-Russian group that attacked several countries' government institutions and attempted to DDoS the 2022 Eurovision Song Contest website.
L0pht, was a hacker collective active between 1992 and 2000 and located in the Boston, Massachusetts area.
Lapsus$, a black-hat hacker group known for using extortion tactics. active since late 2021, allegedly dumping data from Microsoft, Samsung and Nvidia, and with members arrested in March 2022.
Lazarus Group, with strong links to the North Korean government, involved in the Sony Pictures hack, the Bangladesh Bank robbery and the WannaCry ransomware attack.
Legion of Doom; LOD was a hacker group active in the early 80s and mid-90s. Had noted rivalry with Masters of Deception (MOD).
Legion Hacktivist Group, a hacking group that hijacked the Indian Yahoo server and hacked online news portals of India.
Level Seven was a hacking group during the mid to late 1990s. Eventually dispersing in early 2000 when their nominal leader "vent" was raided by the FBI on February 25, 2000.
Lizard Squad, known for their claims of distributed denial-of-service (DDoS) attacks primarily to disrupt gaming-related services. Currently broken up.
LulzSec, a group of hackers originating and disbanding in 2011 that claimed to hack "for the lulz".
Masters of Deception, MOD's initial membership grew from meetings on Loop-Around Test Lines in the early- to mid-1980s. Had noted rivalry with Legion of Doom (LOD).
Mazafaka, financially motivated group and crime forum.
milw0rm is a group of "hacktivists" best known for penetrating the computers of the Bhabha Atomic Research Centre (BARC) in Mumbai.
NCPH is a Chinese hacker group based out of Zigong in Sichuan Province.
OurMine, a hacker group of unknown origin that has compromised various websites and Twitter accounts as a way of advertising their "professional services".
P.H.I.R.M., an early hacking group that was founded in the early 1980s.
Phone Losers of America, an internet prank call community founded in 1994 as a phone phreaking and hacking group.
Powerful Greek Army, is a Greek group of black-hat computer hackers founded in 2016.
RedHack is a socialist hacker group based in Turkey, founded in 1997. They usually launch attacks against the Turkish government's websites and leak secret documents of the Turkish government.
Sandworm, also known as Unit 74455, a Russian cyber military unit of the GRU.
The Shadow Brokers (TSB), originating in summer 2016. They published several leaks containing hacking tools, including several zero-day exploits of the National Security Agency (NSA).
ShinyHunters is a Hacker Group that is said to be responsible for numerous data breaches in 2020 and 2021.
TeaMp0isoN is a group of black-hat computer hackers established in mid-2009.
TeslaTeam is a group of black-hat computer hackers from Serbia established in 2010.
TESO was a hacker group originating in Austria that was active primarily from 1998 to 2004.
The Unknowns is a group of white-hat hackers that exploited many high-profiled websites and became very active in 2012 when the group was founded and disbanded.
UGNazi, a hacking group led by JoshTheGod, was founded in 2011. They are best known for several attacks on US government sites, leaking WHMC's database, DDoS attacks, and exposing personal information of celebrities and other high-profile figures on exposed.su.
Vice Society, a Russian-speaking hacker group known for attacks on healthcare and education organizations
Wizard Spider Russian / Ukrainian hacker group, suspected of being behind the Ireland Health Service Executive cyberattack, sometimes called Trickbot per the malware.
YIPL/TAP - Youth International Party Line or Technological Assistance Program, was an early phone phreak organization and publication created in the 1970s by activists Abbie Hoffman.
Xbox Underground, an international group responsible for hacking game developers, including Microsoft.
UNC1151, believed to be based in Belarus.
[demigod] organization and hacking group led by Nanda gunda, was founded in 2020. They are best known for several attacks on sites,[3] leaking WHMC's database,[4] DDoS attacks, and exposing personal information of celebrities and other high-profile figures on exposed.su.
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