Seokchan Yoon / 윤석찬 @_seokchan_yoon
Security Researcher at @zellic_io / CSE @ KHU / Security Contributor of GitHub, Python, Django, Apache Airflow, Ruby, Rails, Spring / speak: 🇰🇷🇺🇸🇯🇵 ch4n3.kr Yongsan-gu, Seoul, Korea Joined October 2015-
Tweets80
-
Followers371
-
Following437
-
Likes792
good vibes at 31th hackingcamp held by @POC_Crew 🔥🔥🔥
2
0
12
666
1
Download Image
Seokchan Yoon / 윤석찬 retweeted
While playing @defcon CTF Finals with @shellphish I managed to solve the ICO challenge using LLMs (GPT5 + Cursor) and almost no human intervention. You can read how I did it here! wilgibbs.com/blog/defcon-fi…
glad to meet you DEF CON 33's asian folks! it was really great time for me 😃 DEF CON 33で同じアジア人とめっちゃ楽しく遊んだ！
honored to come to DEF CON and to participate in the CTF
Have you ever seen this in ChatGPT? It renders a raw <img> tag, letting me inject a custom SVG payload. 😮
now I'm in Vegas 🇺🇸
明日開催される「HackTheon Sejong CTF」に参加される日本の方いらっしゃいますか？日本語を勉強している韓国人として、ご挨拶できればと思いますし、もしよければ夕ご飯を一緒できたら嬉しいです！
Seokchan Yoon / 윤석찬 retweeted
My research on CVE-2025-49113 is out. fearsoff.org/research/round…. Happy reading! #CVE #roundcube #poc @FearsOff
Seokchan Yoon / 윤석찬 retweeted
I’ve finally made my first contribution to Zellic’s tech blog! That said, this post also reflects the efforts of many teammates who aren’t mentioned by name. Anyway! If you're interested in TON and want to explore its unique security considerations, check it out!
I’ve finally made my first contribution to Zellic’s tech blog! That said, this post also reflects the efforts of many teammates who aren’t mentioned by name. Anyway! If you're interested in TON and want to explore its unique security considerations, check it out!
#RubyKaigi2025 で松山に来ました！Flatt Securityの方々にもお会いできて、嬉しかったです。 RubyやRailsのコントリビューターとして、Rubyの発展をこれからも応援しています！
少し遅くなりましたが、2024年を振り返りながらブログ記事を書きました！ 日本語を勉強中なので不足な部分もありますが、読んでいただけると嬉しいです。😃 new-blog.ch4n3.kr/2024-review-ja/
Seokchan Yoon / 윤석찬 retweeted
We published a blog by @ryotkak that provides a technical explanation of six vulnerabilities he reported to Git and various GitHub-related services, which could potentially lead to Git credential leaks. Check it out! flatt.tech/research/posts…
Seokchan Yoon / 윤석찬 retweeted
The #django SQL Injection vulnerability I reported has been disclosed! 🔥
FuzzingLabs @FuzzingLabs
8K Followers 4K Following Research-oriented Cybersecurity startup specializing in #fuzzing, Vulnerability Research & Offensive security on Mobile, Browser, AI/LLM, Network & Blockchain.
Eduardo Silva @0xnibbles
94 Followers 663 Following 'The keyboard is my piano' • https://t.co/leD8KPALGp • Vulnerability Researcher at Bitsight
c6an @c_6an2224
2 Followers 17 Following
Youming Lin @SudoR00tMe
41 Followers 256 Following
Jacolon Walker @call_eax
136 Followers 696 Following Ex-founder | 🛡️ Security Researcher | 👨🌾 Homesteader | Fun project: https://t.co/RIkq9oyM57 to organize your links.
pang @pang_dev
21 Followers 26 Following
kuvee04 @GamingFreeFire1
18 Followers 592 Following
Zager say @zgrSay1090872
0 Followers 24 Following
teddy @teddyctf
554 Followers 244 Following aka TheSavageTeddy | 🚩Vice Captain - @EmuExploit 🇦🇺 CTF team | uni student | auditor / intern @zellic_io | DEFCON 32 Finalist
jj @d1rtyc4t
0 Followers 69 Following
isibusiso @_isibusiso__
4K Followers 2K Following
なおちき @Naotiki13
280 Followers 335 Following Kotlin, Web, CTF(web) @ m01nm01n, Android GitHub: https://t.co/B7ZKCCFPGM
yt1inn @YouTaekLim1
3 Followers 66 Following
Soisina○ @eyodonJJ
1K Followers 2K Following そいしな(he/him)です、 VR（初心者）:VRchatとか諸々 CTF(初心者）:Rev,Pwnが好き 好きなコトしかしない怠け者です 色々呟いている〜 Atcoder：永遠の#717375 ( ´▽｀) https://t.co/T4x2R2xR57 https://t.co/dXktgKdo8b
scsideath @cybersyrupblog
2K Followers 4K Following COO https://t.co/5v2a20mGMs | DC541 | DC416 | DC604 | DFIR | Malmons trainer gotta catch em all | My opinions are my own
1010mark @3_Jugem
243 Followers 371 Following 「てんてんまーく」と読みます。mark1010でもあります。 好きな部分文字列で呼んでください！ 親しみやすいと思います！ Seccamp 24(LLMハッキング)
moton @moton
618 Followers 599 Following a.k.a Matt has been the director of hacker events at https://t.co/3vdsrhrFtr since 2006. https://t.co/3znz9NUcCa
XCoding @RKadayifci66087
78 Followers 482 Following
crazyman @crazyman823886
1K Followers 1K Following CTFer / APT hunter / RedTeam / BlueTeam the member of @r3kapig the leader of @ShadowChasing1 CVE:CVE-2022-30190 pre account @CrazymanArmy
성은 최 @seongeunchoe4
5 Followers 37 Following
Towaki Takikawa / 瀧... @yongyuanxi
9K Followers 3K Following ceo @outerport (yc s24), former research scientist @nvidia, cs @uwaterloo, phdish @uoft, making technical documents and cad AI-readable
KK @kk_tsukuba
256 Followers 369 Following coins23/The Empire of TSUKUBA(@Empire_2018_11) 5代目代表/Planet Works/茨城03
Alchemist @Alchemist735215
11 Followers 64 Following
hav hav @CookieCutt3r_
1 Followers 94 Following
Aerlyn Vorynx @myu_2y
132 Followers 3K Following
차재민 @Jmcha163651
28 Followers 138 Following
Ramin Farajpour Cami @realraminfp
1K Followers 977 Following Software | Security Engineer. Enjoying #rust #golang #python Power is always dangerous. It attracts the worst and corrupts the best. - Ragnar
Ganesh Kudva @KudvaGanesh
16 Followers 291 Following
vandibik @vick94163
387 Followers 7K Following Creative meme art coin designer, 2D animator, and graphic designer, delivering unique, engaging visuals for branding, social media, and entertainment projects.
Robbert Popcorn @robbert_1978
271 Followers 1K Following CTF player ( Pwn ) for TheRoundTable (m1cr0$oft 0ff1c3) | Shameful team @_cosgang_ | noob at @idekCTF | GCC 2024 🇹🇭
Brandy Patterson @BrandyP68600
5 Followers 167 Following Recruiting webshell engineers to penetrate websites, with a monthly salary of up to $100,000. If interested, please contact https://t.co/XmMBuxplG1
c6an @c_6an2224
2 Followers 17 Following
CODE BLUE @codeblue_jp
6K Followers 625 Following CODE BLUE 2025: International cybersecurity conference 📆 Training: 11/16-17 |Conference: 11/18-19 📢 参加登録受付中!Now Accepting Registrations! HP https://t.co/blERauRf35
pang @pang_dev
21 Followers 26 Following
Winnona 💾 @__winn
4K Followers 2K Following @DistrictCon Founder. Harvard-Georgetown MPP/JD, @CyberStatecraft / @BelferCenter researcher, ex-Google RE / threat research. https://t.co/MJHKl7Myic 👩🏻💻
teddy @teddyctf
554 Followers 244 Following aka TheSavageTeddy | 🚩Vice Captain - @EmuExploit 🇦🇺 CTF team | uni student | auditor / intern @zellic_io | DEFCON 32 Finalist
Advance-sec @advance_sec0
767 Followers 705 Following Advance-sec platform: is one of the top leaders in research and acquisition of vulnerabilities and 0day exploits. Email: [email protected] Wire: @advance_sec
なおちき @Naotiki13
280 Followers 335 Following Kotlin, Web, CTF(web) @ m01nm01n, Android GitHub: https://t.co/B7ZKCCFPGM
yt1inn @YouTaekLim1
3 Followers 66 Following
Shøta Shinogۜi🔑 @Sh1n0g1
3K Followers 495 Following Cybersecurity, LLM Hacker, BlackHat/Defcon Speaker, PenTest Tools Developer https://t.co/LtGIwJ6oR2
セキュリティ・... @security_camp
7K Followers 1 Following セキュリティ・キャンプは、次代を担う日本発で世界に通用する若年層のセキュリティ人材を発掘・育成することを目的としています。
perfect blue @pb_ctf
6K Followers 16 Following A weeb team with a CTF problem. The official Twitter account of the perfect blue CTF team. Ranked #1 2020, 2021, 2023 (as part of Blue Water)
Water Paddler @Water_Paddler
1K Followers 26 Following International CTF Team. https://t.co/OjK0DtQXJ6. Email: wpctf#pm.me
Soisina○ @eyodonJJ
1K Followers 2K Following そいしな(he/him)です、 VR（初心者）:VRchatとか諸々 CTF(初心者）:Rev,Pwnが好き 好きなコトしかしない怠け者です 色々呟いている〜 Atcoder：永遠の#717375 ( ´▽｀) https://t.co/T4x2R2xR57 https://t.co/dXktgKdo8b
ykame(YuhoKameda) @YuhoKameda
2K Followers 588 Following SCSKセキュリティ株式会社 CTO SecurityAnalyst. CTF/OSINT/ZAP Evangelist etc...
jinmo123 @jinmo123
1K Followers 2 Following
NTTドコモ @docomo
948K Followers 55 Following NTTドコモ公式アカウントです。ドコモの商品やキャンペーン情報など、さまざまな取組みをご紹介していきます。ソーシャルメディアポリシーはこちら ⇒https://t.co/hpWSM5FXYy
1010mark @3_Jugem
243 Followers 371 Following 「てんてんまーく」と読みます。mark1010でもあります。 好きな部分文字列で呼んでください！ 親しみやすいと思います！ Seccamp 24(LLMハッキング)
moton @moton
618 Followers 599 Following a.k.a Matt has been the director of hacker events at https://t.co/3vdsrhrFtr since 2006. https://t.co/3znz9NUcCa
みくさん @junmaitei
455 Followers 1K Following Security engineer & Illustrator / 🌽👑 🐚 🎪 ⚓️ ⚒️ 🍙 / 👠⛓️ /🦄 /🔑miku_xss
crazyman @crazyman823886
1K Followers 1K Following CTFer / APT hunter / RedTeam / BlueTeam the member of @r3kapig the leader of @ShadowChasing1 CVE:CVE-2022-30190 pre account @CrazymanArmy
sakura @eternalsakura13
8K Followers 189 Following Lead Security Researcher @zellic_io. 2022-2024 Top 3 Chrome VRP. 2023 Top 2 Facebook Whitehat. 2025 MSRC MVRs 9th. BlackHat Asia/USA & Zer0Con speaker.
Towaki Takikawa / 瀧... @yongyuanxi
9K Followers 3K Following ceo @outerport (yc s24), former research scientist @nvidia, cs @uwaterloo, phdish @uoft, making technical documents and cad AI-readable
Apache Airflow @ApacheAirflow
12K Followers 0 Following Airflow is a workflow scheduler. Now on https://t.co/r5iMFW0E2h
KK @kk_tsukuba
256 Followers 369 Following coins23/The Empire of TSUKUBA(@Empire_2018_11) 5代目代表/Planet Works/茨城03
カネコ商店（カ... @kanekoayanoinfo
70K Followers 0 Following カネコアヤノ(Kaneko Ayano) / kanekoayano 's official staff account. For inquiries, please contact us through "CONTACT" listed on our website.
Kalmarunionen @kalmarunionenDM
2K Followers 88 Following KalmarCTF 2025: https://t.co/8NHWhF6mHU Homepage: https://t.co/R1QLSkNBhi CTFtime Link: https://t.co/UZqSKg6yJ6
Immunefi @immunefi
56K Followers 751 Following Immunefi — One Platform. Unified Security Operations. Complete Onchain Protection. Over $180B of user funds protected across 500+ protocols.
Sigma Prime @sigp_io
11K Followers 31 Following Blockchain security & research firm | Providing in-depth security reviews for top protocols | Founders & maintainers of Lighthouse, an Ethereum consensus client
@bytes032.xyz @bytes032
19K Followers 1K Following chief smart contract security cook @zenith256 tg: https://t.co/fVm8KmTyY2
Kirill Firsov @k_firsov
3K Followers 284 Following Founder and Chairman of @FearsOff | Protecting the World’s Top Crypto Exchanges & Financial Institutions | Cybersecurity Enthusiast
🦋 hyeseong.kim @KrComet
4K Followers 3K Following Integration engineer / Open source hitchhiker / DX enthusiast • Web & WebView engineering @daangnteam • @rescriptlang compiler committer
Out of Bounds @oobs_io
114 Followers 1 Following
Trends for United States
80,7 B posts
108 B posts
360 B posts
13,2 B posts
52,7 B posts
26,7 B posts
9.628 posts
46,8 B posts
14,6 B posts
6.989 posts
62,4 B posts
30,9 B posts
7.414 posts
7.445 posts
40,4 B posts
4.954 posts
6.590 posts
1.746 posts
9.207 posts
30,4 B posts
You might like
ipwning
@ipwning
747 Followers
Hyunsoo Cha
@soo_sudo
318 Followers
Donghyun Lee
@donghyunlee00
424 Followers
st4rlight
@st4rlight_exp
1K Followers
Jinheon Lee
@howdays1
258 Followers
tonix
@tonix0114
332 Followers
n1net4il
@n1net4il
240 Followers
Sunghun Kim
@hey_sunghun
94 Followers
developer
@d3ve10per
253 Followers
P1nkjelly
@p1nkjelly
318 Followers
V4bel
@v4bel
1K Followers
Kim Dong-uk
@justlikebono
461 Followers
Kitae Park
@pkt0615
132 Followers