Jason Geffner @JasonGeffner
I’ve moved to Bluesky — https://t.co/Lpz3RZMp3U Seattle, WA Joined April 2012-
Tweets2K
-
Followers2K
-
Following265
-
Likes2K
Learn how Microsoft scales Dynamic Application Security Testing (DAST) with automation. Check out Jason Geffner's blog post and BlueHat talk: ➡️MSRC blog: msrc.microsoft.com/blog/2025/01/s… ➡️BlueHat talk: youtube.com/watch?v=kfuOzD…
To ensure the security of Microsoft's web services and protect our customers, we're using innovative solutions to automate Dynamic Application Security Testing (DAST) at scale. This effort targets thousands of internal and external API web services across Microsoft’s portfolio of
@JaredDeMott @MSFTBlueHat @JaredDeMott, you might get to hear more about this DAST work in an upcoming BlueHat Podcast ;)
To ensure the security of Microsoft's web services and protect our customers, we're using innovative solutions to automate Dynamic Application Security Testing (DAST) at scale. This effort targets thousands of internal and external API web services across Microsoft’s portfolio of 1st party services, which are applications or services that are created, owned, and managed by Microsoft itself. Learn more in our blog post from Jason Geffner, Principal Security Architect at Microsoft: msrc.microsoft.com/blog/2025/01/s…
Take a rare look inside how Microsoft is working to use automated reverse engineering techniques to secure its own web services! youtube.com/watch?v=kfuOzD… #BlueHat
📣SPEAKER ANNOUNCEMENT📣 Jason Geffner (@JasonGeffner), Principal Security Architect, Microsoft, will be presenting a talk titled “How Microsoft is Scaling DAST” at #BlueHat. Jason is an information security professional with an extensive history in application security, risk management, malware analysis, threat intelligence, incident response command, endpoint security, security automation, vendor security management, and security research & development.
I'm excited to announce that I'll be speaking at Microsoft BlueHat (@MSFTBlueHat) on October 29th! Full schedule here: cdn-dynmedia-1.microsoft.com/is/content/mic…
We’re sharing our discovery & analysis of four vulnerabilities in Perforce Server, including a critical vulnerability that could give unauthenticated remote attackers complete control over unpatched systems & connected infra. Patches available: msft.it/6013indnt
I recently discovered a new CVSS 10.0 vulnerability in Perforce Helix Core Server that allows for unauthenticated remote code execution (RCE) as LocalSystem. Read all about it and three new CVSS 7.5 vulnerabilities in my blog post below. microsoft.com/en-us/security…
It took me almost 4 hours, but I finally solved this sudoku. Hardest one yet!
So frustrated with acronyms. I asked everyone at work what IDK stands for, and they each said “I don’t know” ☹️ I guess it’ll continue to be a mystery.
DEADLINE EXTENDED!!!! ⏰⚠️🙌⏳🚨➡️ The application to attend #BlueHat October 2023 has been extended to Friday, September 8 at midnight Pacific Time. We hope you can join us from October 11-12, 2023 in Redmond, WA, US. Submit your application today: msft.it/60179ZRCF
He also said I should floss weakly 🤷♂️
@ianhoyle @Microsoft LOL, I’ve done management at four different companies. It has its pros and cons, but I’ve always loved the more technical work.
One of the great things about working for @Microsoft is the flexibility provided to move from an IC role to a management role, and to move from a management role to an IC role. After making the former move 18 months ago, I am thrilled to make the latter move this month!
I am excited to return to my technical roots and to be hands-on with driving the future of security at Microsoft as a Principal Security Architect!
Do you hate dad-jokes and occasional infosec ramblings? Then you definitely shouldn’t follow me on Threads. threads.net/@g3ffn3r
@wbm312 Time to revert back to doom-scrolling Fark…
SwiftOnSecurity @SwiftOnSecurity
410K Followers 9K Following computer security person. former helpdesk.
Will Dormann is on Ma... @wdormann
27K Followers 1K Following I play with vulnerabilities and exploits. I used to be here on Twitter but now I'm here: @[email protected] https://t.co/hXggdAVkSQ
Justin Elze @HackingLZ
71K Followers 5K Following CTO @TrustedSec | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
💻 Sherrod @sherrod_im
37K Followers 7K Following Difficult mystery girl connected to the divine forces of the universe.
Ray [REDACTED] @RayRedacted
61K Followers 8K Following Hacker, Researcher, Podcast Producer (Tribe of Hackers, Darknet Diaries). Proud dad of the fastest climber in the world. Ever. “Ut scandis, alios subleva”
lcamtuf @lcamtuf
40K Followers 499 Following Substack: https://t.co/yFvmNisGW3 Homepage: https://t.co/iFAXZxCO5H
Luke Stephens (hakluk... @hakluke
100K Followers 2K Following Hacker, marketer. I manage socials and marketing for cybersecurity orgs. Founder of @hacker_content and @haksecio
Thomas Roccia 🤘 @fr0gger_
35K Followers 2K Following AI Security x Threat Intel · Threat Researcher · Creator of #Unprotect & #NOVA · Malware Warlock · Python 🧡 · Prev @Microsoft @McAfee_Labs
Mike Felch (Stay Read... @ustayready
17K Followers 2K Following Offensive @ TrustedSec | Hacking since Renegade BBS backdoors | Prior CrowdStrike/BHIS | In Christ's grip | Fighter for truth | K1HAQ
Allen Joe @zrwikicc
1 Followers 346 Following
Miley Kate💋 @wandeeringmiley
206 Followers 2K Following bartender, tattoo lover, and always up for a good conversation and living authentically 🍹
Jiqiek @Jiqiek92826
42 Followers 1K Following
Poaco @Poaco806678
22 Followers 1K Following
Fraueanaj @Fraueanaj6055
24 Followers 472 Following
Genevieve Moore @GenevieveM52147
104 Followers 5K Following
Mito Kehayov @mito_kehayov
20 Followers 456 Following 🇪🇺 / 🇧🇬 / 🇦🇹 / 🇨🇦 Full-Stack IT Security Engineer
❤️ Emily_Charlott... @Chrlstina24685
277 Followers 3K Following Overseas Warehouse Operations Manager 💕
Shinobyx @crypticrebel337
20 Followers 1K Following Bug bounty hunter who is a bit inactive on social media, so don't expect too much from me here...
Sesllears @Sesllears8bij
46 Followers 4K Following
Mary Rossi @MatthewMarjory5
244 Followers 3K Following When one door closes, another one opens. Don't give up no matter what.
Lord Xorington @Xor_Lord
193 Followers 2K Following Working at the crossroads of threat intel and threat detection
Caroline @carline2009
16 Followers 309 Following
Gunter Ollmann @gollmann
3K Followers 151 Following Conquering Cyber Security Through Knowledge, Experience, and Leadership. Tweets and re-Tweets may be passing thoughts or temporal diversions, not an employers.
cem @cemonatk
10 Followers 620 Following
Alireza @silverbios
58 Followers 500 Following
Eloise @Theshear8fT
22 Followers 601 Following
Nitesh Surana @_niteshsurana
697 Followers 1K Following Cloud Threat Research w/ TrendAI | Opinions/retweets are personal reflections | Metalhead | If you can, be kind.
IMcPwn @IMcPwn
25 Followers 18 Following
Neyra @Neyray8Ta7
41 Followers 4K Following
Ruth @57kuPUsrh8l081
55 Followers 7K Following
Trustedlabs @Trusted_Labs
8 Followers 945 Following
Dominik Antal @AntalDominik
318 Followers 5K Following Data, reverse engineering, cybersecurity, and "things" involving the electromagnetic spectrum. AI augmented curiosity. Hitting silicon ceilings. Photonaholic.
99% safe AI, @shutdowntheai
111 Followers 6K Following
Fella Bot # 11259 Pro... @rocks_todd
630 Followers 1K Following 🇺🇦🇺🇸♥ - INTJ, Type 8/Type 3 - War vet 🔥 - #NAFO tool dev 💻🧨 - Adding to Lada backorders 💀🚗 - Vatniks who don't enlist are not real men 💋💄🦩
Phese @Phese189950
81 Followers 2K Following
_TwirlGrace @twirlgrace43299
61 Followers 5K Following
OldMan_GameDev @XiaTaptara
8K Followers 1K Following A new dad, I make video games and do art. We are making a casual silly multiplayer party video game called Holiday Party: Mascot Brawl!
emrullahyeter @eytr1903
4 Followers 254 Following Korkmadan yaşanlar bir gün ölür, korkanlar her gün ölür. Onurlu yaşayın 🇹🇷🦅
digital0ak @digital0ak
23 Followers 90 Following I am root in my own domain. I've been involved in tech since the 80s. I've been involved in music before that. I play guitar, sometimes well. I look for truth.
Sysayt @Sysayt194456
52 Followers 3K Following
2003 jacke @2003Jacke54576
6 Followers 98 Following
quidbit @nktropy
146 Followers 658 Following
Microsoft Threat Inte... @MsftSecIntel
196K Followers 998 Following We are Microsoft's global network of security experts. Follow for security research and threat intelligence.
Guy @random23699
114 Followers 1K Following
Pepothes @pepothes82775
57 Followers 3K Following
Ankush B @ankushbaveja
147 Followers 1K Following #Son #Father #SportsMan #YaaroKaYaar #Infosec #Defender #SecurityOperations Trying to find the patient zero Disclaimer:::Probability(retweet∩endorsement)=U
Lindsey O’Donnell W... @LindseyOD123
4K Followers 2K Following Cybersecurity writer @HuntressLabs @DecipherSec Previous @ThreatPost, @CRN, @Holy_cross alum
SwiftOnSecurity @SwiftOnSecurity
410K Followers 9K Following computer security person. former helpdesk.
chompie @chompie1337
89K Followers 1K Following hacker, exploit developer/weird machine mechanic head of X-Force Offensive Research (XOR) @IBM
Halvar Flake @halvarflake
45K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
Will Dormann is on Ma... @wdormann
27K Followers 1K Following I play with vulnerabilities and exploits. I used to be here on Twitter but now I'm here: @[email protected] https://t.co/hXggdAVkSQ
Justin Elze @HackingLZ
71K Followers 5K Following CTO @TrustedSec | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
Yarden Shafir @yarden_shafir
25K Followers 318 Following A circus artist with a visual studio license
Binni Shah @binitamshah
141K Followers 165 Following Linux Evangelist, Malwares, Security enthusiast ,Investor,World Economy, Finance,Contrarian , Philanthropist , Reformist , Sigma female [email protected]
lcamtuf @lcamtuf
40K Followers 499 Following Substack: https://t.co/yFvmNisGW3 Homepage: https://t.co/iFAXZxCO5H
Adriana Porter Felt @__apf__
66K Followers 957 Following I like writing silly Tweets, but that doesn't pay so I build things at @googledeepmind. Principal Engineer. ex-@googlechrome. volunteer @2ndharvest. 🇺🇸🇨🇷
James Forshaw @tiraniddo
49K Followers 336 Following Security researcher in Google Project Zero. Author of Attacking Network Protocols. Tweets are my own etc. Mastodon: @[email protected]
Microsoft Security Re... @msftsecresponse
145K Followers 215 Following We are the Microsoft Security Response Center. To report security vulnerabilities or abuse in Microsoft products, visit https://t.co/kxEbdfMny1.
Microsoft Threat Inte... @MsftSecIntel
196K Followers 998 Following We are Microsoft's global network of security experts. Follow for security research and threat intelligence.
Microsoft BlueHat @MSFTBlueHat
5K Followers 212 Following BlueHat is where the security research community and @Microsoft security pros come together as peers, to connect, share and learn. Run by @MSFTSecResponse
LaurieWired @lauriewired
155K Followers 292 Following researcher @google; serial complexity unpacker; https://t.co/Vl1seeNgYK ex @ msft & aerospace
Ryan @Haus3c
7K Followers 355 Following Director of Research @BeyondTrust @btphantomlabs. Former @SpecterOps; @Microsoft. "Old man yells at cloud" vibes
Christian Selig @ChristianSelig
73K Followers 2K Following iOS developer, creator of @ApolloReddit, @PixelPalsApp. Previously at . he/him. Pronounced See-lig. i love aminals. 🌱
Arby Abood @ArbyAbood
433 Followers 823 Following #compbio #projectlead #QA @Colgate. Opinions my own
Lee Holmes @Lee_Holmes
19K Followers 777 Following Partner Security Architect, Azure Security. PowerShell developer, fanatical hobbyist, and author of the PowerShell Cookbook. @[email protected]
Kenton Varda @KentonVarda
16K Followers 274 Following Tech lead for @Cloudflare Workers, https://t.co/bFUDCZ7BUc, https://t.co/Hjf1slmJqs, https://t.co/oIKxYZA4LW. 🦋 https://t.co/8QKY5gf1BK
𝗥𝗬𝗔𝗡 𝗦... @withzombies
3K Followers 1K Following "im not distilled! im not distilled!!", i continue to insist as i slowly shrink and transform into a prompt
Jesse D'Aguanno @0x30n
2K Followers 611 Following Hacker, Vuln Research, 2x winner DEF CON CTF, Founder & CEO Blackwing Intelligence (@blackwinghq), not a CISSP (@[email protected])
Andy Nguyen @theflow0
69K Followers 447 Following The opinions stated here are my own, not those of my company.
Microsoft Security @msftsecurity
344K Followers 321 Following Be first to know about AI, threats, and new tools. Quick hits, expert tips, and real-time security news—follow for smarter, safer ops.
Aanchal Gupta @nchlgpt
2K Followers 180 Following CVP & Deputy CISO (Microsoft) Happy to discuss anything related to security, privacy, compliance, gardening, & hiking (nchlgpt =full name without vowels)
BlueHat IL @BlueHatIL
6K Followers 534 Following
Jared DeMott @JaredDeMott
3K Followers 834 Following Husband/Father, Hacker, Entrepreneur, Former NSA, Researcher, Trainer, Author. Working in Big Tech. Thoughts are my own. :)
Stephanie Calabrese @fromsteph2u
325 Followers 330 Following
William R. Messmer @wmessmer
710 Followers 339 Following Software engineer at Microsoft working on debuggers. Tweets are my own. Mastodon: @[email protected]
PHP CEO BLUECHECKMARK... @PHP_CEO
41K Followers 1 Following CEO OF A PHP COMPANY. DISAPPOINTING HUSBAND. DISAPPOINTED FATHER. ETH ME @ 0xdC91bEE94699dF922475f13d1151b9a2A61B39f3
Cezary Cerekwicki, @i... @cezarcerekwicki
305 Followers 203 Following Opinions are my own, but I'm willing to share. For instance: C++ dēlenda est. He/him.
Adam Parkhomenko @AdamParkhomenko
717K Followers 72K Following Dem Strategist. Dad to Cameron, Paxton, Brooks, Moose and Simba. Former DNC National Field Director, Hillary advisor and more.
dragosr @dragosr
23K Followers 9K Following Stop, Think, Pwn! (see also @[email protected], https://t.co/BjclXYWQ9R for alternate)
Christopher @Kharosx0
3K Followers 2K Following Founder @signal_labs : https://t.co/8grJlb5jwZ 🇦🇺 Vulnerability researcher (MORSE) @Microsoft Discord: Kharosx0
Andrea Lambert @cybernerdherder
3 Followers 22 Following Cyber Security PM. Virginian who loves GB. Mom to two. Yoga, wine, great food and beach lover.
Henry Wang (theKidOfA... @kidOfArcrania
969 Followers 66 Following SWE at MSFT MORSE, pwner, rev | teams: @pb_ctf | DEF CON 29, 30, 31 Finalist | @[email protected] | opinions are own not employer's
Farzan Karimi @jumpycastle
575 Followers 133 Following Black Hat + DEFCON Speaker | X-Google Red Team
Nothing but antic cla... @joranwei
361 Followers 630 Following Done here. See: https://t.co/HKIEHAvuof
cje @caseyjohnellis
29K Followers 5K Following human | troublemaker & troubleshooter | founder @bugcrowd @disclose_io, advisor | pioneer of #bugbounty as-a-service | opinions CC0 1.0 | #hacktheplanet
Allen Jones @ajMSFT
2K Followers 897 Following (REDACTED). Golf nut. BBQ and Tesla fan. Ex-MSTIC co-founder.
Adam Geffner @ageffner
10 Followers 6 Following AVP - Contact Center Solutions & Architecture @ Mphasis
Vsauce @tweetsauce
1.2M Followers 1K Following My name is Michael Stevens. https://t.co/scDOMiNr56 | https://t.co/bcwS0yo8Uh
Old Man in the PNW @svalentineh
707 Followers 2K Following I'm a security guy, and a proponent of the rule of law. Nothing is perfect, but better is better. #infosec #security #secdevops
no context memes @nocontextmemes
2.6M Followers 620 Following making memes at @memelordtech | dm for promo | create your own memes easily here 👇 try for free
katelyn hurley @katelynjperry
416 Followers 444 Following find me on bluesky instead @katelynhurley.com
Johnathan Norman @spoofyroot
4K Followers 333 Following Security research and engineering lead at @microsoft. on mastodon: https://t.co/YfJkktByFv and @spoofy.bsky.social not posting here anymore.
mreavey @mreavey
603 Followers 310 Following Cybers. InfoSec. Cloud Security. Currently CISO for EA. Former Azure Security Director and head of MSRC for about a decade.
Arthur Wongtschowski @artwongt
646 Followers 363 Following Vulnerability research manager at Google Cloud. Previously at Microsoft, working on breaking Windows and Azure. Opinions are non-existent or my own.
Ditmar Wendt @DitmarWendt
898 Followers 2K Following mostly use this website as an RSS feed. 🗝https://t.co/7vVfqQsz6x
Andrea Rubenstein @arubenstein85
6 Followers 5 Following
Perri Adams @perribus
7K Followers 987 Following @Dartmouth ISTS Fellow & @SAISHopkins Adjunct Prof., inter alia. Former @DARPA, @DEFCON CTF, etc. @DistrictCon, @hexacon_fr, @LABScon_io CFP Review Boards
mr.d0x @mrd0x
45K Followers 299 Following Security researcher | Co-founder https://t.co/QxBlzp9A8w | https://t.co/zqMXQRZjQN | https://t.co/Fq7WSqTBva | https://t.co/eKezFcO6nd
















