ThreatInsight @threatinsight.proofpoint.com Proofpoint's insights on targeted attacks and the cybersecurity threat landscape.
Joe Tidy BBC News @joetidy.bsky.social Cyber Correspondent, BBC News. Author of Ctrl+Alt+Chaos. I cover cyber security, online safety, crypto, AI, social networks and everything 💻📱📡. Global news mainly. DMs always open for tips/ feedback.
DomainTools @domaintools.bsky.social A global leader for internet #intel that enables security practitioners to proactively defend their organization in a constantly evolving threat landscape.
Ray [REDACTED] @rayredacted.com Past: Host of "Tribe of Hackers"; Assoc. Producer "Darknet Diaries."
Current: Cybersecurity researcher and executive. Also, father of the fastest climber who has ever lived. Seriously.
Warning: I talk about my son ALOT
“Ut scandis, alios subleva.”
FIRST.org @first.org Improving Security Together
Katie Nickels @likethecoins.bsky.social 
Kostas @kostastsale.bsky.social Running ➡ http://defendpoint.ca | http://edr-telemetry.com | https://edr-comparison.com/ | http://detectionstream.com | 🇬🇷🇨🇦
Occasional Transpo @occtranspo.bsky.social Ottawa 🇨🇦 • LRT status updates and municipal commentary and advocacy. https://OccasionalTransport.ca
It takes a village to push a train.
OC Transpo is Occasional Transportation.
David Oxley @oxley.io Interim head of information security at Anduril Industries. @CitizenLab.ca Research Fellow. Former federal agent. Fan of space, books, cyberpunk, sci-fi, espionage history, and storms. Personal account. 🇺🇸 🇺🇦 🇹🇼 #ThreatIntel
Storm chasing 📸 🌪️: @wxdox.com
Eliot Higgins @eliothiggins.bsky.social Founder and creative director of Bellingcat and director of Bellingcat Productions BV. Author of We Are Bellingcat.
Florian Roth @cyb3rops.bsky.social Placeholder profile : https://x.com/cyb3rops | glad to be in this respectful safe space | vi/vim
Sekoia @sekoia.com Sekoia is the European cybersecurity company building the Cyber Operations Platform for the AI era.
FalconFeeds.io @falconfeedsio.bsky.social Democratizing Cyber Security. Threat intelligence platform for Cyber Security professionals and Small / Medium business. Insights from Darkweb and Threat Actors.
Ransomware.live @ransomware.live Ransomware.live tracks & monitors ransomware groups' victims and their activity. It was created by @Julien.io, a security researcher. The website provides information on Ransomware groups, victims, negotiations, payment demands and much more.
Gi7w0rm @gi7w0rm.bsky.social Just me, worming through the interwebs.
Threat Intelligence and #URINT Analyst
Other places: linktr.ee/gi7w0rm
Support me: https://ko-fi.com/gi7w0rm
RussianPanda @russianpanda.bsky.social I’m a panda, I am addicted to malware.
shenetworks @shenet.works Networking • Hacking • Hacking Networks (she/her)
shenet.works
SOS Intelligence @sosintel.bsky.social The Dark Web Monitoring platform for business and enterprise. Managed Threat Intelligence services to detect darkweb & OSINT data-breach and theft. #NAFO Intel
Nasreddine Bencherchali @nasbench.bsky.social Detection @Splunk | previously @nextronsystems | @sigma_hq & @magicswordio maintainer | Eternal Learner
Cyber Detective @cybdetective.bsky.social Every day I write about #osint (Open Source Intelligence) tools and techniques. Also little bit about forensics and other cybersecurity related themes
rootsecdev @rootsecdev.bsky.social Security Consultant @TrustedSec | Military grade meme poster, researcher, cloud penetration tester, voider of warranties. My thoughts are my own.
Sherrod @sherrod.bsky.social It’s me. Sherrod DeGrippo 
SLEUTHCON @sleuthcon.bsky.social Tickets for 2026 are now available!
https://www.sleuthcon.com
Who said what? @g0njxa.bsky.social There is only one me, no one else.
Main contact method:
https://twitter.com/g0njxa
BleepingComputer @bleepingcomputer.com Breaking cybersecurity and technology news, guides, and tutorials that help you get the most from your computer. DMs are open, so send us those tips!
Michael Geist @mgeist.bsky.social Law Professor, Canada Research Chair in Internet and E-commerce Law, University of Ottawa
www.michaelgeist.ca
Law Bytes Podcast: https://open.spotify.com/show/5iDUCcDrkzGai0OdTgoucv
http://mgeist.substack.com
Chris Krebs @thekrebscycle.bsky.social Aka @c_c_krebs over there 
vx-underground (automated mirror) @vxundergroundre.bsky.social The largest collection of malware source code, samples, and papers on the internet.
Password: infected
(unofficial, this is a bot! Maintained by a private individual, the bot can't handle retweets or replies, support soonish)
Ryan Westman @ryanw3stman.bsky.social Sr. Manager, Threat Research @sophossecurity.bsky.social | Cybersecurity | Threat Intelligence | National Security | Mis/Dis/Mal-information | #DEFCON30 / #Sleuthcon Speaker | GCTI GCFA GSLC | CAF vet
Joseph Cox @josephcox.bsky.social Hacking/crime/privacy journalist. Author of DARK WIRE, buy here: https://www.hachettebookgroup.com/titles/joseph-cox/dark-wire/9781541702691/#preorder Co-founder of 404 Media. Signal: joseph.404 Email: joseph@404media.co
Olaf Hartong @olafhartong.nl Security researcher with a camera | @FalconForce.nl | Microsoft MVP | Snow man role model | https://youtube.com/@olafhartong
Jack Rhysider @jackrhysider.bsky.social Creator of Darknet Diaries.
Verification: https://twitter.com/JackRhysider/status/1675298532406984707
Justin Elze @handle.invalid CTO @TrustedSec.com | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
Phillip Wylie @phillipwylie.bsky.social Offensive Security Professional | Phillip Wylie Show Podcast Host | The Pentester Blueprint coauthor | TribeOfHackers Red Team | https://linktr.ee/phillipwylie
Fabian Bader @fabian.bader.cloud #Security #Azure #EntraID #XDR #MDE #Identity #M365 #AD #PKI #KQL
Microsoft MVP
Tweets and opinions are my own
Joe Slowik @pylos.co Threat Intel / CTI / OT / ICS / Critical Infra stuff along with other things. I genuinely care, and wish others did too.
Website: pylos.co
Training/Consulting: paralus.co
Allan “Ransomware Sommelier” Liska @ransomwaresommelier.com Recorded Future - Ransomware Researcher
Owner @greenarcher.io - Yours Truly, Johnny Dollar | The Press Guardian | The Clock | The Green Archer
Weird mix of security, comics, photography and wine!
www.greenarcher.io
GreyNoise @greynoise.io GreyNoise analyzes Internet background noise. Use GreyNoise to remove pointless security alerts, find compromised devices, or identify emerging threats.
Kevin Collier @kevincollier.bsky.social I cover digital threats for NBC News. Tip me! @kevincollier.01 on signal, kevin.collier@nbcuni.com. NYC, from West Virginia.
Ron Deibert @rondeibert.bsky.social Director of The Citizen Lab at the University of Toronto's Munk School of Global Affairs & Public Policy
Author of Chasing Shadows https://chasingshadowsbook.ca/ 
TrendAI Zero Day Initiative @thezdi.bsky.social TrendAI Zero Day Initiative™ (ZDI) is a program designed to reward security researchers for responsibly disclosing vulnerabilities.
Cthulhu Answers @cthulhu.network 
Lisa Forte @lisaforte.bsky.social Cyber security, climbing, caving and diving! 💜
Mark Russinovich @markrussinovich.bsky.social CTO of Microsoft Azure, author of novels Rogue Code, Zero Day and Trojan Horse, Windows Internals, Sysinternals tools. Opinions are my own.
Adam Shostack @adamshostack.bsky.social Threat modeling. BH Review Board. Affiliate Professor, UW. Fixed autorun. Helped create CVE.
Not sure why we're building graphs on yet another (effectively) centralized system. https://infosec.exchange/@adamshostack
Scott Helme @scotthelme.bsky.social Hi, I'm Scott Helme, a Security Researcher, Entrepreneur and International Speaker. I'm the creator of Report URI and Security Headers, and I deliver world renowned training on Hacking and Encryption.
https://scotthelme.co.uk
Will T @bushidotoken.net 🇬🇧 | Senior Threat Intelligence Advisor at Team Cymru | Co-author SANS FOR589 | Co-founder Curated Intel
Allison Nixon @nixonnixoff.bsky.social Chief Research Officer @ Unit 221B
most reliable way to reach me is my company's outreach form on the website
my other urls:
https://infosec.exchange/@nixonnixoff
https://www.linkedin.com/in/allison-nixon-81822124/
don't bother contacting me on twitter
CYBERWARCON @cyberwarcon.bsky.social CYBERWARCON is a one-day conference in Arlington, VA focused on the specter of destruction, disruption, and malicious influence on our society through cyber capabilities.
cyberwarcon.com
John Hammond @johnhammond.bsky.social Hacker. Friend. Cybersecurity Researcher at Huntress.
Eric Capuano @eric.zip - Dad of two <3
- Co-founder Recon InfoSec
- SANS DFIR Instructor
- BlackHat Trainer
- IANS Faculty
- Trainer @digitaldefenseinstitute.com
- Blog: https://blog.ecapuano.com
- ⬡ ODESZA, Lane 8, Kasbo 🎧
- ❤ @whit.zip
The Record @therecordmedia.bsky.social Covering the world of cyber and intelligence from every angle.
PortSwigger Research @portswiggerres.bsky.social Web security research from the team at PortSwigger.
STÖK @stokfredrik.bsky.social Hacker / Creative
Mischief & GOOD VIBES ONLY
Jason Haddix @jhaddix.bsky.social CEO, CISO, Trainer, Hacker, and Speaker.
AI + hacking + sec leadership.
ex:BuddoBot-Ubisoft-Bugcrowd-Fortify-HP-Redspin-Citrix.
Ian Coldwater 🧊🚫 @lookitup.baby Kubernetes SIG Security Co-Chair.
I hack things and build community.
Minneapolis. They/them. Stay punk 🏴
MSP feed info: https://bsky.app/profile/amityf.bsky.social/post/3mrv36uo4pc2a
Katelyn 🅅 Medusfour @medus4.com Activist, Hacker cosplayer, Artist. Data economy abolitionist.
@cdc_pulpit Sinfluencer, Head of Humanity @ Veilid, designer of weird shirts at hack.xxx
I love gross terrifying things. Because I am one
Deth Veggie @dethveggie.bsky.social Herr Doktor Professor Deth Vegetable -- CULT OF THE DEAD COW -- .ooM
Hacker / Archaeologist / Gadabout / Professional Something-or-Other. Anti-fascist and Pro-science. As the old axiom says, reality has a liberal bias.
Nazis need to be punched.
April King @april.social Staff Security Engineer at some random tech company, previously Mozilla, Dropbox, LinkedIn, and (pre-Elon) Twitter. Has read @kateconger.bsky.social’s autobiography.
web @ grayduck.mn // also github.com/april
Marcus Hutchins @malwaretech.com threads.com/@malwaretech
https://linkedin.com/in/malwaretech
https://marcushutchins.com
DilDog 🅅 @dildog.l0pht.com Tech Dysangelist
cDc/hack.xxx/Veilid
Support Veilid! Badge: 🅅 www.veilid.com
Merch at: @hack.xxx
he/him/"hey buddy"
Grimes @grimes.bsky.social Princess Puck 🧚🏻♀️
Dmitri Alperovitch @dmitri.silverado.org Geopolitics, Russia, China, Cyber
Chairman @silverado.org
Author of WorldOnTheBrink.com
Host GeopoliticsDecanted.com podcast
Founder Alperovitch Institute for Cybersecurity Studies at Johns Hopkins SAIS
Co-Founder CrowdStrike
@DAlperovitch elsewhere
Bellingcat @bellingcat.com Bellingcat is a global collective uncovering facts to hold power to account. Our work is independent. Our methods are public. Our community is global.
Want to support our charity? bellingcat.com/donate
TechCrunch @techcrunch.com Technology news and analysis with a focus on founders and startup teams.
Got a tip? http://techcrunch.com/tips
Katie Moussouris (she/her/she-hulk/she-ra)🌻 @k8em0.bsky.social Founder & CEO LutaSecurity @payequitynow MIT&Harvard visiting scholar, @MasonNatSec fellow, 1/2 Chamoru, 1/2 Greek all-American hacker
Electronic Frontier Foundation @eff.org We're the Electronic Frontier Foundation. We're a nonprofit that fights for your privacy and free speech online. Find all of EFF's social media accounts at eff.org/social.
Marc Rogers @cjunky.bsky.social Ramblings of a Mad Englishman: Hacker @ BBC's Real Hustle & Mr Robot. Head of Sec @ DEF CON. Founder @ CTI-League, Ransomware Taskforce, w00w00, CDC NSF, (He/Him).
Also
Twitter @marcwrogers
Mastodon cj@chaos.social
SwiftOnSecurity @swiftonsecurity.com computer security person. former helpdesk
Rachel Tobac @racheltobac.bsky.social Hacker & CEO @SocialProofSec security awareness/social engineering training, videos, talks | 3X @DEFCON🥈 | Ex Chair @WISPorg | Ex @CISAgov Technical Advisory Council under Director Jen Easterly
Kim Zetter @kimzetter.bsky.social Journalist - cyber/natn'l security. Speaker. Georgetown adjunct prof. Author - COUNTDOWN TO ZERO DAY: Stuxnet and the Launch of the World's First Digital Weapon
Signal: KimZ.42
https://www.zetter-zeroday.com
Jayson E. Street💜🤗💜 @jaysonstreet.bsky.social Hacker - Helper - Human
JaysonEStreet.com
Jake Williams @malwarejake.bsky.social Breaker of software, responder of incidents, IANS Faculty, VP R&D Hunter Strategy.
Troy Hunt @troyhunt.com Founder & CEO of @haveibeenpwned.com, the most trusted name in data breach intelligence. Speaker, blogger, Microsoft Regional Director. Gold Coast, Australia.
Deviant Ollam ツ @deviantollam.bsky.social Philadelphian in Cascadia. Vociferous champion for Oxford commas, two spaces after a period, and ellipses. I break into buildings. 🔓
"Even if the world were ending tomorrow, I would still plant a tree." 🌲
(he/they)
Runa Sandvik @runasand.bsky.social Founder of Granitt, securing journalists and at-risk people around the world. 
Lesley Carhart @hacks4pancakes.com I am eminently qualified to speak from experience about a variety of dumpster fires.
ICS DFIR at Dragos, martial artist, marksman, humanist, level 14 Neutral Good rogue, USAF retired. I post *very serious* things about infosec. Thoughts my own. Enby. 🏳️🌈
InfoSecSherpa 🏔️ Lake Ontario 🚣♀️ @infosecsherpa.bsky.social #Librarian turned #InfoSec & #DataPrivacy practitioner. #Philly area hoagie mouth. InfoSecSherpa and Sherpa Intelligence: Your Guide Up a Mountain of Information! Portfolio: https://linktr.ee/infosecsherpa #GoBirds
Dennis @dennisf.bsky.social Gentleman of leisure. Legendary wedding guest. I wrote two of the best books you haven't read. Friend of hackers. https://decipher.sc
Whitney Champion 🍪 @whit.zip security architect / co-founder @digitaldefenseinstitute.com / co-founder Recon InfoSec
♥♥♥ == @eric.zip, nerdery, rainbows, sweatpants
she/her | mama of 3 | 🤍🙏🌿🌈🍄
unicorns.lol
https://short-stack.net
whitneychampion.com/portfolio
Tarah Wheeler @tarah.org CSO of TPO.group ♦️ EFF Board of Directors♦️she/her ♦️ bestselling author but only that one time
Whitney Merrill @wbm312.bsky.social I nudge people to care about privacy and security. CPO/DPO. Privacy/infosec lawyer. Hacker. Fighting for privacy, digital civil liberties & the users. Ex @EA @FTC |my views are my own. I used to post on Twitter at @wbm312.
Kevin Beaumont @doublepulsar.com cybersecurity weather man. scanning the horizons for cloudy cyber. Expert at nothing except computer rubbish. Anti-ransomware since 2015.
Rob Joyce @rgblights.bsky.social Cyber guy. Former NSA cybersecurity director and chief of TAO. Lover of memes. Warning - occasional outrageous Christmas light content.
DEF CON @defcon.bsky.social The world’s premier hacker conference. Serving the global hacker community since 1993.
Defcon.org
Forum.defcon.org
Defcon.social
chompie @chompie.rip hacker, poster, weird machine mechanic
https://chompie.rip
corgi @c0rg1.bsky.social I hack things
Matt Blaze @mattblaze.org Scientist, safecracker, etc. McDevitt Professor of Computer Science and Law at Georgetown. So-called expert on election security and a few other things. Slow photographer. RF nerd. Occasionally blogs at https://mattblaze.org/blog
Andy Greenberg @agreenberg.bsky.social Writer for WIRED. Author of SANDWORM. Latest book, TRACERS IN THE DARK: The Global Hunt for the Crime Lords of Cryptocurrency, out now. agreenberg@wired.com. Andy.01 on Signal.
Alex Stamos @stamos.org CPO/CSO of Corridor.dev, teaching at Stanford.
B1gt1dd13s @bentleyaudrey.bsky.social Tech & Humor 🪬
Johnny Xmas @j0hnnyxm4s.johnnyxmas.net We’re sorry, but until civilization decides to begin prosecuting child molesters and cannibals, this account will no longer be capable of being kind to people. Please kindly fuck all the way off.
Grifter @grifter801.bsky.social Threat Hunting & DFIR, Hacker, Geek, DEF CON & Black Hat CFP Review Board Member, DEF CON Contest/Events/Demo Labs Dept. Head, Black Hat Staff, DC801 Founder
Rik Ferguson @rikferguson.com Immigrant. VP Security Intelligence @Forescout, Co-founder @RespectInSec. Board @vaultree, Cybersecurity Futurist, Researcher, Award-winning writer/producer. He/Him. Pussy in bio.
Substack - Ferguson.ink
Slava Ukraini 🇺🇦
SteveD3 (Steve Ragan) @steved3.io Father. Grandpa. Geek. Hacker. Former journalist. Security researcher. CMO @BSidesLV.org Member: Curated Intel 
Chris Nickerson @indi303.bsky.social Red Teamer, Business Owner, Hacker, CEO, Investor, Cybersecurity, dog dad, Lares, Breachquest, Liability, B-sides co-founder, @TEDalumni , kinda canadian, #303- Z @zer0day.bsky.social @zer0day.bsky.social
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz