5unkn0wn Profile
5unkn0wn

@5unKn0wn

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Following
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442

Taeyang Lee, a security researcher at @theori_io.

Seoul, Republic of Korea
Joined February 2017
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@5unKn0wn
5unkn0wn
2 days
@mrexodia @BackEngineerLab All obfuscated functions are composed of huge loop-based MBA instructions. However, through identifying meaningful register (or memory) access near the first access point, we can reveal each MBA's input/output patterns. This allows us to analyze the original algorithm efficiently
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@5unKn0wn
5unkn0wn
1 month
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@5unKn0wn
5unkn0wn
3 months
@hugeh0ge you guys are still legend in my memory ๐Ÿ˜Š
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@5unKn0wn
5unkn0wn
5 months
gg
@theori_io
Theori
5 months
Theori, 2024 ์‚ฌ์ด๋ฒ„๊ณต๊ฒฉ๋ฐฉ์–ด๋Œ€ํšŒ(CCE) ์ข…ํ•ฉ์šฐ์Šน ๐Ÿ† CCE ์ผ๋ฐ˜๋ถ€์— ์ฐธ์—ฌํ•œ ํ‹ฐ์˜ค๋ฆฌ 4๊ฐœ ํŒ€์ด 1, 2, 3, 4๋“ฑ ๋ชจ๋‘ ์ฐจ์ง€ํ–ˆ์Šต๋‹ˆ๋‹ค! ๐Ÿฅ‡ ์ข…ํ•ฉ์šฐ์Šน 'The Duckling': @junorouse, @5unKn0wn, @_bincat, ์„ฑํ•ด๋นˆ ๐Ÿฅˆ ์ผ๋ฐ˜๋ถ€ ์šฐ์Šน 'The Gosling': ๊ฐ•์šฐ์›, @RBTree_, @yechan_bae, ๊น€ํ˜„ํƒœ ๐Ÿฅ‰ ์ผ๋ฐ˜๋ถ€ ์ค€์šฐ์Šน 'GYG': @s0ngsari530, @bbbig12 ๐ŸŽ– ์ผ๋ฐ˜๋ถ€ ์žฅ๋ ค '๊ตฐํ•„': @imssm99 ํ‹ฐ์˜ค๋ฆฌ ์ธํ„ด๋“ค๋„ ์ฒญ์†Œ๋…„ ๋ถ€๋ฌธ์—์„œ ์šฐ์ˆ˜ํ•œ ์„ฑ์ ์„ ๊ฑฐ๋’€์Šต๋‹ˆ๋‹ค. ๐Ÿฅˆ ์ฒญ์†Œ๋…„๋ถ€ ์ค€์šฐ์Šน '๋ƒฅ์ฝ”': ๊ถŒ์œจ, ๋งน์„œํ˜„ ๐Ÿฅ‰ ์ฒญ์†Œ๋…„๋ถ€ ์žฅ๋ ค '์†œ์‚ฌํƒ•์€์”ป์–ด๋จน์–ด์š”': ๋„์›์ค€ ์ด๋ฒˆ ์šฐ์Šน์œผ๋กœ ํ‹ฐ์˜ค๋ฆฌ๋Š” ์ง€๋‚œ 2019๋…„-2022๋…„ ์ข…ํ•ฉ์šฐ์Šน, 2023๋…„ ์ผ๋ฐ˜์šฐ์Šน์— ์ด์–ด 6๋ฒˆ์งธ ์šฐ์Šน์„ ๋‹ฌ์„ฑํ•ฉ๋‹ˆ๋‹ค! ์‚ฌ์ด๋ฒ„๊ณต๊ฒฉ๋ฐฉ์–ด๋Œ€ํšŒ(CCE)๋Š” ๊ตญ๊ฐ€์ •๋ณด์› ์ฃผ์ตœ, ๊ตญ๊ฐ€๋ณด์•ˆ๊ธฐ์ˆ ์—ฐ๊ตฌ์†Œ๊ฐ€ ์ฃผ๊ด€ํ•˜๋Š” ๊ตญ๋‚ด ํ•ดํ‚น๋ฐฉ์–ด๋Œ€ํšŒ์ž…๋‹ˆ๋‹ค. ํ‹ฐ์˜ค๋ฆฌ๋Š” ๊ตญ๋‚ด์™ธ CTF์—์„œ ์šฐ์Šนํ•˜๋ฉฐ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์‚ฌ์ด๋ฒ„ ๋ณด์•ˆ ์—ญ๋Ÿ‰์„ ๋Š์ž„์—†์ด ์ž…์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ฐธ์—ฌํ•˜์‹  ๋ชจ๋“  ๋ถ„๋“ค ๊ณ ์ƒํ•˜์…จ์Šต๋‹ˆ๋‹ค. #Theori #ํ‹ฐ์˜ค๋ฆฌ #CCE #CTF #Winner #Hacking #Hacker #Cybersecurity
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@5unKn0wn
5unkn0wn
6 months
Fav chall: Helium implements ephemeral key exchange through slightly modified libhydrogen. The most painful but fun part was analyzing whole inlined sse3 functions and identifying modified algorithms. After exchanging the key, we can read the flag via arbitrary file read vuln๐Ÿ˜‹
@theori_io
Theori
6 months
๐Ÿ† Theori Wins DEF CON 32 CTF and DARPA AI Cyber Challenge (AIxCC) Semifinals!ย ๐Ÿ† We are thrilled to announce that Theori has once again emerged victorious at DEF CON 32 CTFโ€”the world-renowned "Hacker Olympics"! With this win, Theori secures its 8th overall victory and an unprecedented three consecutive titlesโ€”the most in DEF CON history! DEF CON CTF is the largest and most prestigious hacking defense competition in the world, attracting the brightest cybersecurity talents globally. Theori's CTF team, The Duck, teamed up with Maple Bacon from @UBC and PPP from @CarnegieMellon to form the record-breaking team Maple Mallard Magistrates (MMM). But wait, there's more! Riding the wave of our DEF CON victory, Theori has also advanced to the finals of the AIxCC competition, an AI Cyber Challenge hosted by Defense Advanced Research Projects Agency (@DARPA ). Out of countless competitors, only 7 teams made it to the finals, and we're proud to be among them, securing a $2 million prize. This double achievement is more than just a recordโ€”it's a testament to Theori's unrivaled expertise in cybersecurity and our unwavering drive to push the boundaries of innovation. A huge shoutout to all the amazing teams who made it to the finals for both DEF CON and AIxCCโ€”you all brought fierce competition! And a big thank you to the organizers who make this event outstanding every year. What's next? As we celebrate this historic win, we're already gearing up for the next big challenge. Stay tuned for more groundbreaking innovations from Theori! #DEFCON32 #DEFCONCTF32 #Theori #Cybersecurity #TheDuck #MMM #AIxCC #DARPA #HackerOlympics
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@5unKn0wn
5unkn0wn
7 months
@l33d0hyun Thanks ๐Ÿ˜Š
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@5unKn0wn
5unkn0wn
7 months
I've reported several bootloader vulnerabilities to Samsung, and these were patched last June
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@5unKn0wn
5unkn0wn
8 months
@saika_priv ์•„ใ… ์Šˆํผ๊ณ ์ƒ
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@5unKn0wn
5unkn0wn
9 months
@dlstoddldirl @moonkn0wn ๐Ÿ˜‹๐Ÿฅน
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@5unKn0wn
5unkn0wn
9 months
Ran priority scheduling for playing multiple ctf ๐Ÿคญ
@theori_io
Theori
9 months
Two birds with one stone? Nah more like two CTFs with one duck! ๐Ÿ†๐Ÿฆ† Theori sweeps both the @BSidesSF CTF and @defcon qualifiers at the top of the leaderboard! Congrats to our teams #TheDuck and #MMM for first place! Curious what these genius hackers are further capable of? Check out our newest security solution at @RSAConference Booth 634! #Theori #ํ‹ฐ์˜ค๋ฆฌ #DEFCON #BsidesSF #BsidesSF2024
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@5unKn0wn
5unkn0wn
11 months
I enjoyed ACSC 2024 ! It's sad that I can't go to the finals because I'm not a student. ๐Ÿ˜ข
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@5unKn0wn
5unkn0wn
11 months
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@5unKn0wn
5unkn0wn
11 months
RT @binarly_io: ๐ŸšจBreaking news from the lab: Finding the Hidden Threats Posed by Dead and Vulnerable Code Primitives Our REsearch team higโ€ฆ
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@5unKn0wn
5unkn0wn
11 months
RT @theori_io: Do you use a virtual machine to browse dangerous links safely? If you use the Chrome browser inside that virtual machine, isโ€ฆ
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@5unKn0wn
5unkn0wn
1 year
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@5unKn0wn
5unkn0wn
1 year
@dicegangctf @Blackhatmea @SAFCSP @Flagyard Congratz you guys were strong ๐Ÿ‘
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@5unKn0wn
5unkn0wn
1 year
RT @Blackhatmea: ุฃู„ู ู…ุจุฑูˆูƒ ู„ูุฑูŠู‚ The Duck ุงู„ูุงุฆุฒ ุจุงู„ู…ุฑูƒุฒ ุงู„ุซุงู†ูŠ ููŠ ู…ุณุงุจู‚ุฉ #ุงู„ุชู‚ุท_ุงู„ุนู„ู… ุถู…ู† ูุนุงู„ูŠุฉ #ุจู„ุงูƒ_ู‡ุงุช23ุŒ ูˆุฌุงุฆุฒุฉ 200,000 ุฑูŠุงู„ ๐Ÿ‘๐Ÿป๐Ÿ‘๐Ÿป @Nโ€ฆ
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