Unit 221B @unit221b
Unit 221B is a cybersecurity company offering products & services to companies seeking discreet, best-in-class, advanced security operations and training unit221b.com New York, NY Joined August 2015-
Tweets169
-
Followers840
-
Following374
-
Likes104
In this latest from @CyberScoopNews, @nixonnixoff lends her expert perspective to the latest arrests of two teenagers in the U.K. whose collective charges include extortion of at least 47 U.S.-based organizations and alleged involvement in an attack on Transport for London.
In this latest from @CyberScoopNews, @nixonnixoff lends her expert perspective to the latest arrests of two teenagers in the U.K. whose collective charges include extortion of at least 47 U.S.-based organizations and alleged involvement in an attack on Transport for London.
Congratulations to @nixonnixoff on being featured in @HBO's "Most Wanted: Teen Hacker", a four-part docuseries following the case of Finnish hacker Julius Kivimäki, aka "Zeekill". Add the show to your watch queue here: go.unit221b.com/48e5UY0
Great work keynoting Day 1 of @BSidesLV @nixonnixoff! For anyone who couldn't be in the room, you can rewatch the talk here (timestamp 2:52:43): go.unit221b.com/3HbrwJC
Another feature for @nixonnixoff in the wake of the FBI's recent PSAs: "There has been a population explosion in The Com and it is good to see law enforcement respond to this—not just with a PSA but with real crackdowns."
Another feature for @nixonnixoff in the wake of the FBI's recent PSAs: "There has been a population explosion in The Com and it is good to see law enforcement respond to this—not just with a PSA but with real crackdowns."
Our Chief Research Officer Allison Nixon will be keynoting @BSidesLV next Monday, August 4th at 11:30 AM PT! Let us know if you'll be in Vegas for #cybersecurity conference central and want to connect with our team. For more info on Allison's talk: go.unit221b.com/46v02Jd
Thank you @arstechnica for shouting out our CRO Allison Nixon's work in this case! So many of these threat actors think they can operate with impunity and anonymity—shifting that perspective will help in dismantling these networks.
Thank you @arstechnica for shouting out our CRO Allison Nixon's work in this case! So many of these threat actors think they can operate with impunity and anonymity—shifting that perspective will help in dismantling these networks.
Unit 221B has spent years focused on our capacity to disrupt threat actors & drive real-world arrests. This week @TheJusticeDept announced a guilty plea from "kiberphant0m": work led at 221B by our Chief Research Officer, Allison Nixon. Read the release: go.unit221b.com/4lDoDQK
Our CIO & Co-Founder @lancejames shared insights on @MaltegoHQ's Human Element podcast about how "slowing down" during cyber crises leads to better outcomes & how to balance technical work with leadership. Listen now: go.unit221b.com/4kdi466
#New from Unit 221B: We explored #Trae, @BytedanceTalk's #AI #IDE, and its data collection system for #model #development. Read more: blog.unit221b.com/dont-read-this… #CyberSecurity #ThreatIntelligence #AI #SecurityResearch #ByteDance
Allison Nixon on the “Waifu” arrest: “Leader of a group behind numerous major intrusions in the past five years.” Read more: go.unit221b.com/48KDZ0k #CyberSecurity #ThreatIntelligence
Canadian authorities apprehend hacker known as Waifu after extensive investigation. We’re very proud of our investigators for their contributions to help apprehend this notorious threat actor; Unit 221B remains committed to making the online world safer. go.unit221b.com/3YUA1yw
Discover OSINT geolocation techniques in our latest blog! Learn how digital breadcrumbs reveal location info and protect your privacy. #CyberSecurity #OSINT #Unit221B go.unit221b.com/3BLSoge
Check out our first co-authored article with one of our most valued partners, @Overwatch_data, titled “Fraudsters Responding to Telegram’s New Policies"! Explore how these policy changes are impacting fraudsters and the broader cybersecurity landscape: go.unit221b.com/481jyf2
Honored by @Intel471Inc's shoutout to our founder & CIO Lance James for discovering Zeus! Jason Passwaters’ story of bringing a cybercriminal to justice shows the dedication of all involved. Congrats to everyone who helped in this fight against cybercrime! go.unit221b.com/3XQtJzH
We’ll be @ WSJ Tech Live on 6/6 in NYC! Lance James & @Nixon_Nixoff will present on The Com (Scattered Spider) & ransomware trends in a 45-min interview with @bobmcmillan. Apply here to attend: hubs.ly/Q02z0Vs80 #CyberSecurity #WSJTechLive #TheCom #Ransomware #Event
We’ll be @ WSJ Tech Live on 6/6 in NYC! Lance James & @Nixon_Nixoff will present on The Com (Scattered Spider) & ransomware trends in a 45-min interview with @bobmcmillan. Apply here to attend: hubs.ly/Q02z15kb0 #CyberSecurity #WSJTechLive #TheCom #Ransomware #Event
briankrebs @briankrebs
333K Followers 2K Following Independent investigative journalist. Author of 'Spam Nation,' a NYT bestseller. Former Washington Post reporter. Mastodon: https://t.co/fTKNavlMwp
J⩜⃝mie Williams @jamieantisocial
10K Followers 7K Following threats && stuff || #UNC1799 forever 🤘|| @DistrictHeather ♥️ + 🍷 **𝚅𝚒𝚎𝚠𝚜 𝚎𝚡𝚙𝚛𝚎𝚜𝚜𝚎𝚍 𝚊𝚛𝚎 𝚖𝚈 օ𝚠𝚗**
@mikko @mikko
229K Followers 934 Following Researcher and a best-selling author. Keynote talks at RSA, Black Hat & DEF CON. TED Speaker. Chief Research Officer at Sensofusion.
Allan “Ransomware S... @uuallan
17K Followers 6K Following Back The Press Guardian & The Clock:1942 https://t.co/liXLX2DeQ8
Kimberly @StopMalvertisin
16K Followers 628 Following Security Researcher | Cyber Threat / Malware Analyst | Ex Sr. Threat Analyst @ Proofpoint | Founder of Stop Malvertising
InfoSecSherpa 🏔️ @InfoSecSherpa
51K Followers 4K Following #Librarian 📚 to #InfoSec 🤖 #Philly area hoagie mouth 🥨#Ginfosec 🍸 #Everton ⚽️ Your guide up a mountain of information! 🏔️ #GoBirds
Jake | JCyberSec_ @JCyberSec_
10K Followers 67 Following Expert in Credential Phishing and Phishing Kit Research. Working in Cyber Security - Threat Intelligence #Phishing
Christopher Peacock @SecurePeacock
7K Followers 2K Following #PurpleTeam | Ex @RaytheonTech MSSP, @SCYTHE_IO, & @GD_OTS | Taught at BlackHat & DEFCON | #100DaysofSigma | Keep exploring, keep learning, and stay curious
Kim Zetter @KimZetter
93K Followers 3K Following Journalist - cyber/national security. Author - COUNTDOWN TO ZERO DAY: Stuxnet and the Launch of the World's First Digital Weapon. https://t.co/334DzfSL1f
Rick Barnett @ClearLakeRick
37 Followers 358 Following
Thy_kingdom_come @ef_oh_gee
75 Followers 407 Following the fear of God is the beginning of wisdom #fullStackDeveloper #bitcoin Bsc. Black market economics
Liang Zhao @zhaodown
314 Followers 2K Following Founder @meet_vansary / PRWeek 40 Under 40 Fintech and noodle enthusiast Ace Next Gen Board Member
Andrey @bigballsdre
27 Followers 121 Following
ZT @FM_DataInsight
1K Followers 6K Following Monetized Prediction - AI/ML ⋆｡ﾟ🪐｡⋆｡ ﾟ@CLAUDEnFRIENDS 🌠
Clement Burns @plusmoneydawgs
0 Followers 79 Following
ℌ4𝔯0𝔩𝔡 @JonSelman
2K Followers 1K Following Defcon Contest & Events Goon, Demo Labs Lead, Blue Team Village Founder, Lonely Hackers Club Admin, DC404/DC770/DC678
Jay Belda 🧢☂️�... @jay_belda
178 Followers 2K Following Ex Hawkins National Laboratory Research Scientist. #YangGang #StandWithUkraine #NAFOfellas #MriyaReport #LettersFromUkraine
Chosen Masters @masters_chosen
117 Followers 53 Following -AI cloud mastering -AI Music Video Gen -Free Merch Maker +more https://t.co/H0TxK22wlN A solo founder & solo employee org
BSidesNoVA @BSides_NoVA
5K Followers 2K Following Official TwitterX site of BSides NoVA - Northern Virginia's premier cybersecurity conference in the @securitybsides tradition. October 10-11, 2025. TIX SEP 5!
チャリー (ชา�... @carlosenrique
611 Followers 2K Following Journaliste scientifique et technologique. Consultant. | 🔭 🚀 ✈️ 🖥 🎻 🎵 🚴 🏊 🏈 ⚾ 🔍 📷🖌📰🤖 🧬 (Just available on @signalapp) and @LINEjp_official
Nadir Soza 🇳🇮 @nadirss14
19 Followers 72 Following I love my family and technology. I know a lot of nothing and a little of a lot!!! 💻 🇳🇮
Racim Boussa @racim_boussa
0 Followers 459 Following
Kelz Kelz @kelz6_kelz
16 Followers 139 Following
Stefano B² @happyfou_
0 Followers 20 Following
PH4N70M @Ph4n70mPhr34k
116 Followers 987 Following
Luke McKinlay @lukemckinlay
46 Followers 217 Following
𝙈𝙞𝙆𝙚 𝙈... @MiKeMcDnet
1K Followers 1K Following Husband, Father, Geek, Gamer. @ISC2 #CISSP #CCSP, @Axelos_GBP #ITIL, @Microsoft #MCP, @BGShonorSociety #ΒΓΣ, @SFISSA @ISSAINTL Senior Member, @MortalKombat fan.
Hector L. Santiago, E... @HLSantiago
518 Followers 3K Following President -Quantum Consultants LLC ⚖️ Cyber 💻 A.I. 🤖 Law & Technology 🇵🇷 Dad/Husband 🇺🇸 Gulf War Vet USN ⚓ 🇦🇶O.A.E. Old Antarctic Explorer
StormyCloud Inc @StormyCloudInc
2K Followers 705 Following 🌍 Championing Digital Privacy for All 🛡️ Non-Profit 501(c)(3) | Default Outproxy for @i2p 🛠️ Empowering users with privacy-first tools
Dodge This Security @shotgunner101
7K Followers 5K Following Computer Security Professional. Tweets are my own. Rooster Teeth Archive Project: https://t.co/gawoj5ZZyG
Mehrdad @thisMehrdad
0 Followers 111 Following
Yqarumef @Yqarumef545
4 Followers 628 Following
Securityblog @Securityblog
12K Followers 14K Following There are 10 types of people in the world. Those who understand binary, and those who don't. All opinions and views are my own. #BsidesDub organizer
Kevin Brock @kjbrock
38 Followers 221 Following Currently making software, previously St. John's (Santa Fe), US Navy
Donna Scott @DonnaSc44796098
18 Followers 239 Following
Roeabp @roeabp
0 Followers 18 Following
AMLBot @AMLBotHQ
7K Followers 471 Following Blockchain intelligence at your fingertips | AML, KYC & Investigations
nofomo @itsnofomo
41 Followers 235 Following The best times in crypto are over. Lock in playing Cambria.
Okluku @Okluku8928407
20 Followers 2K Following
jaswinder singh @jaswinders75273
0 Followers 4 Following
Kaare Svensgaard @Kaarecasian
397 Followers 5K Following He/him. Слава Україні! Let everything happen to you/Beauty and terror/Just keep going/No feeling is final. Ambivert, eksoteriker og nogengange kalsarikännit
Fwemum @Fwemum38871
37 Followers 2K Following
ChristineForselles @karaise1987
6 Followers 494 Following 🚀 Join our elite stock group for 50%-150% gains! Free daily picks & expert strategies. Join now: https://t.co/HaaCem9gwS
Las Ui @l54ddsa
2 Followers 114 Following
briankrebs @briankrebs
333K Followers 2K Following Independent investigative journalist. Author of 'Spam Nation,' a NYT bestseller. Former Washington Post reporter. Mastodon: https://t.co/fTKNavlMwp
MalwareTech @MalwareTechBlog
277K Followers 1 Following Not here anymore. Profiles: https://t.co/sFoOuGmYK2
Alex Stamos @alexstamos
90K Followers 2K Following You can find me at: https://t.co/Enct5hx8bS https://t.co/CuE5u72rhW
@mikko @mikko
229K Followers 934 Following Researcher and a best-selling author. Keynote talks at RSA, Black Hat & DEF CON. TED Speaker. Chief Research Officer at Sensofusion.
Andy Greenberg (@agre... @a_greenberg
71K Followers 1K Following WIRED writer, author of SANDWORM and now TRACERS IN THE DARK: The Global Hunt for the Crime Lords of Cryptocurrency. Andy.01 on Signal. [email protected]
Katie🌻Moussouris (... @k8em0
110K Followers 10K Following @LutaSecurity CEO @payequitynow MIT&Harvard visiting scholar, @MasonNatSec fellow, 1/2 Chamoru, hacker @k8em0.bsky.social Legacy blue check
Dave Kennedy @HackingDave
224K Followers 6K Following Founder @Binary_Defense @TrustedSec Co-Owner https://t.co/HQC75WhdJh. @WeHackHealth Pod. God + Family/Hacker/CSO/USMC/Intel/Fitness. Make the world a better place.
Kim Zetter @KimZetter
93K Followers 3K Following Journalist - cyber/national security. Author - COUNTDOWN TO ZERO DAY: Stuxnet and the Launch of the World's First Digital Weapon. https://t.co/334DzfSL1f
KOA 850 AM & 94.1 FM @KOAColorado
34K Followers 2K Following Colorado News, Talk, Sports. Official Home of the @Broncos, @Rockies, and @CUBuffs.
Ross Kaminsky @Rossputin
16K Followers 2K Following Talk host @KOAColorado (Denver) M-F 9AM-12PM MT, dad, husband, trader, world traveler. pro-liberty & chocolate. Not GOP, not Dem. And no, It's not for Vladimir.
McK🇨🇦🇨🇦�... @KMcKay27
186 Followers 111 Following
Black Hat MEA @Blackhatmea
22K Followers 55 Following #BHMEA25 | @TahalufGlobal @SAFCSP in assoc. with @BlackHatEvents | Dec 2-4 2025 📍Riyadh Exhibition and Convention Center, Malham
waigyu @Xeus
2K Followers 5K Following
Kathryn Tewson @KathrynTewson
13K Followers 1K Following Good in a crisis and at no other time. This place is state media now. Find me at https://t.co/qyNHu9CFJI
Skelly @KeenanSkelly
3K Followers 1K Following #Cybers #BombSlayer #DiversityChampion #Hacker @XRVillage - #Founder #CEO #Baker #Gardener #SmokedMeatMaker - Thoughts my own.
NYSEC @nysecsec
3K Followers 13 Following An informal meetup of information security professionals in New York. A drinking meetup with an information security problem. Every third Tuesday of the month.
The Hofmann @tjhofma
46 Followers 638 Following
April Lorenzen @april_lorenzen
299 Followers 797 Following April Lorenzen #ZETAlytics | #dataScientist | #DNS | #Security | Massive passive DNS data is what I comb daily
M3AAWG @M3AAWG
997 Followers 112 Following The Messaging, Malware and Mobile Anti-Abuse Working Group (M3AAWG) brings the industry together to work against bots, malware, spam, DDoS and online exploits.
Allison Nixon @nixonnixoff
3K Followers 615 Following Chief Research Officer at Unit 221B -- if you need to get ahold of me use Linkedin or my company's outreach form, not this website
Fred HK @fr3dhk
3K Followers 263 Following /* Security & Malware Research | Developer for https://t.co/LwUotFZWKL | Poking holes in everything & writing about it | Read here: https://t.co/pw6Fny0k27 */
jayeshthakur @jayeshmthakur
3K Followers 886 Following Husband, Father, Student, Security n00b. Interested in Cyber Security Research, Pen testing, RED Teaming, & Threat Hunting, Thoughts and Tweets are my own.
John Jay Research @JohnJayResearch
5K Followers 843 Following Features research and scholarship from the academic community at John Jay College of Criminal Justice. Engages with events and issues of interest to the same.
#BSidesNYC @BSidesNYC
2K Followers 120 Following The official account for Security BSides New York City. October 18, 2025 @ John Jay College
Digital Citizens @4SaferInternet
5K Followers 2K Following We are a coalition of Internet experts working to make the Internet a safer place for children, seniors, and people from all walks of life. #digcit
لَمْيَاءُ �... @Owainaa
406 Followers 742 Following I wonder and dig at the roots | Random tweets | #Juve | #Hilal | @lamyaown
David Colombo @cyber_colombo
6K Followers 1K Following Founder, Cyber Security Researcher, Keynote Speaker, Advisory Board Member. Speaker @worldgovsummit. Featured in @business, @technology, @techcrunch & more
Deep Instinct @DeepInstinctSec
9K Followers 2K Following The first & only #zeroday data security company that prevents & explains unknown threats in real-time, powered by #DeepLearning. Fight AI with the best AI.
Merritt Group @MerrittGroup
1K Followers 2K Following Intelligent #marketing fuels great companies 🔥 We help innovative companies effectively reach, engage and convert #tech, #health and #government buyers.
Michelle Schafer @mschafer
6K Followers 6K Following Cybersecurity PR & Marketing Pro. Beach Girl. Proud Mom of Mason! Starbucks Lover. Golfer. Skier. 5k Runner 🏃♀️
Leah Culver @leahculver
82K Followers 2K Following Beta tester, software engineer, and angel investor. ✨ iOS at @airbnb. Co-author of OAuth and oEmbed specs. Former founder @breaker and @pownce.
heinbrian @heinbrian
473 Followers 2K Following Not Anonymous - favs, RT’s are just a momentary observation @[email protected]
Jenn @_nextjenn
1K Followers 364 Following Black Badge @DEFCON, Social Engineering | Private Investigator | Locksmith | Offensive Security Consultant
The Provost / سيد�... @MsEntropy
20K Followers 926 Following Your Lady of Chaos (Theory) | Cassandra of Geopolitics | MENA - Nazis - ISIS - political violence - etc. |
Cybrary @cybraryIT
51K Followers 186 Following The Leading #Cybersecurity Professional Development Platform 🚀 If you have any questions, please contact our support team at [email protected]! 💻
Sports_ISAO @SportsISAO
138 Followers 579 Following Cybersecurity for amateur and professional sports; including athletes, venues, stadiums, games, leagues, teams, referees, sponsors and equipment manufacturers.
Maureen MacGregor @PR_techie
608 Followers 1K Following Storyteller, live music addict, RPSGT - Be kind whenever possible. It is always possible.
Philly Prince @phillyprince1
21K Followers 13K Following CEO Winston N Cohen Collection Agency Former CFO English Sports Betting . Liaison CRMR. Beat Freddie Downtown Brown 🐴 at The Kingdom . Former Radio Host LVSN
Peter Kruse | Cybercr... @peterkruse
13K Followers 849 Following Peter Kruse is a cybersecurity researcher. Co-founder of CSIS Security Group, Kruse Industries, SIE-Europe & Heimdal. CARO member. CISO at Clever.
Ma77Carpenter @Ma77Carpenter
614 Followers 259 Following Tweets and opinions are my own, not that of my employer
officebob @OfficeBob
3K Followers 1K Following SPFX, Pyrotechnics, & Smart-ass comments. ERD-certified instructor for display fireworks & SPFX pyro. He/Him. Bunny dad to Maynard.🐰 DMs rarely answered.
Fuck You I Quit @fuckyouiquit
452K Followers 479 Following The labor market is a mess. Here to show you why. Highlighting workers conflict with poor management, corporate greed, bad business, and the economy.
Kevin Golas @RogueWorks
18 Followers 56 Following
ℵ₁ @aleph_one@inf... @aleph_one
6K Followers 203 Following
Wade Baker @wadebaker
3K Followers 1K Following #InfoSec researcher; @CyentiaInst founder & data storyteller; @VTPamplin professor; @vzDBIR creator; Dad x5; Post mainly on LinkedIn these days.
Doel @lengkoanost
83 Followers 3K Following
Jack McCarthy @McCarthyLabs
320 Followers 5K Following Geopolitical Intelligence & Espionage | Cyber Threat Intelligence Research & Analysis | Digital Investigative Analysis. -Modeling the real "Three-Body Problem"!
Mathew Schwartz @mathewjschwartz
3K Followers 4K Following Reporter + photographer + travel aficionado. This is my personal Twitter account (more photos, cat videos, bread making); @euroinfosec is my work one (fewer).
Cezary Podkul @Cezary
6K Followers 3K Following Investigative + data journalist in Hong Kong working on https://t.co/vvOmkfhPl8 book about #pigbutcheringscams. Bylines in @ProPublica. Newstip? [email protected]Trends for United States
You might like
