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What Is 8Chan And Why Should You Care?

Alex Ciarniello August 22, 2019 Open Source Threat Intelligence

Launched in 2013, 8chan was an imageboard site similar in structure to 4chan. The site was shut down in August 2019 after being used to share manifestos linked to three mass shootings in the United States and New Zealand.

8chan was originally built as a discussion platform to circumvent what it’s creator, Fredrick Brennan, perceived as the Internet’s “loss of free speech.” 8chan is affiliated with hate-groups (such as neonazis, alt-righters, and misogynists) and illegal activities. 

The site gained traction after the popular imageboard site 4chan banned posts affiliated with Gamergate (a widespread harassment campaign against women and progressivism in the gaming community). 

It was blacklisted by Google in 2015 and taken off the clearnet completely in the aftermath of the El Paso, Poway, and Christchurch mass shootings.



8chan users anonymously discuss controversial or harmful topics that have been flagged and banned by other imageboard sites, such as 4chan. Despite its original rule—Do not post, request, or link to any content illegal in the United States of America. Do not create boards with the sole purpose of posting or spreading such content—the site contains topics about illegal activities and hate-filled discussion.

This platform has been linked to radicalizing shooters, who often post manifestos in the moments or days prior to committing attacks. Manifestos typically include references to previous shooters, descriptions of the forthcoming attack (e.g. weapon types), and racially or politically-motivated reasons behind the attack.


Swatting and coordinated harassment. Users organize prank phone calls to incite emergency services deployment to a victim’s address. 

Child pornography. Users have created boards to discuss child pornography and rape, and share images.

Conspiracy theories and harmful activism. 8chan has hosted discussions on conspiracy theories, such as deep state theories associated with QAnon, and the Pizzagate conspiracy targeting democrats in the 2016 U.S. Presidential election.

Shootings and manifestos. 8chan has been linked to multiple mass shootings, including:

  • Bethel Park Highschool: An 18-year-old was arrested and charged after threatening on 8chan to carry out a mass shooting at Bethel Park Highschool in March 2019.
  • Christchurch Mosque Shootings: Brenton Tarrant posted links to a 74-page manifesto and a livestream of the attack on 8chan before killing 51 individuals at two mosques in Christchurch, New Zealand on March 15, 2019.
  • Poway Synagogue Shooting: John T. Earnest posted an open letter to 8chan shortly before opening fire in the California Synagogue on April 29, 2019, killing one.
  • El Paso Shooting: Patrick Crusius posted a four-page manifesto to 8chan shortly before opening fire in an El Paso Walmart on August 3, 2019, killing 22.

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Even though 8chan itself is no longer online, its users and their hateful ideologies  are still active—in fact, the site is set to relaunch as “8kun.” Early in October 2019, 8chan made a post on Twitter requesting former 8chan board owners to migrate their content over to 8kun.

8chan, 8kun, and similar anonymous forums on the deep web harbour valuable threat intelligence. Accessing this information is critical for public safety officials seeking to mitigate and investigate crime, including active shooter situations and other events linked to extremism, harassment, and pedophilia.


Anonymous, public imageboard sites such as 8chan are a valuable source of intelligence for analyzing and understanding the aftermath of an event. It’s also useful for advising public safety teams on how to prevent future incidents. How can public safety officials access relevant information quickly?

Due to the nature of their content, imageboard sites such as 8chan are often not indexed by search engines on the clearweb, or have moved entirely to the darknet. This makes searching for relevant information extremely difficult and time-consuming. Threat intelligence discovery tools, such as Beacon, are necessary to locate useful information.

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Beacon is a fully-indexed deep and dark web discovery tool that allows users to search for discussion board content from the safety of their usual browser. Instead of manually searching through sites like 8chan for useful intel, Beacon aggregates relevant data based on keywords and search filters for site name, date published, and post title. For example, Beacon users can search for any known usernames tied to a specific event or discussion, or search for keywords prevalent in manifestos (perpetrators will often reference previous attacks and use hate speech).

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The prevalence of imageboard sites as platforms for illegal activity, harassment campaigns, and mass shootings make it them crucial sources of intelligence for public safety officials. With the launch of 8kun on the horizon, deep web search tools play a huge role in accessing this information quickly and effectively.

Book a demo to learn more about what Beacon can do for your organization. 



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