Jastes 2022. 7. 28. 21:00


Basic RCE L02 - WriteUp

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๋ง ๊ทธ๋Œ€๋กœ ํŒŒ์ผ์ด ํšŒ์†๋˜์–ด x32dbg๊ฐ€ ์‹คํ–‰์ด ์•ˆ๋˜๋„ค์š” IDA๋Š” ์‹คํ–‰์ด ๋˜๊ธด ํ•œ๋ฐ..
ํ•ด๋ณด๋‹ˆ๊นŒ ๊ทธ๋ ‡๊ฒŒ ์ •ํ™•ํ•˜๊ฒŒ๋Š” ์›ํ•˜๋Š” ๊ฐ’์€ ์•ˆ ๋‚˜์™€์„œ..

์œˆ๋„์šฐ 11์—์„œ๋Š” ์ €๋ ‡๊ฒŒ ๋œจ๋„ค์š” ์ผ๋‹จ HxD(Hex Editor)๋กœ ํ™•์ธ ํ•ด๋ด…์‹œ๋‹ค

์• ์‹œ๋‹น์ดˆ ์ฝ๊ธฐ ์ „์šฉ์œผ๋กœ ๋งŒ๋“ค์—ˆ๋„ค์š”.. ํ•˜๊ธด ๊ทธ๋Ÿฌ๋‹ˆ๊นŒ ํšŒ์†ํ–ˆ๋‹ค๊ณ  ํ–ˆ๊ฒ ๋‹ค
๋ฐ‘์œผ๋กœ ๋” ๋‚ด๋ ค๊ฐ€๋ฉด์„œ ํ™•์ธํ•ด๋ณด๋ฉด...

๊ธ€๋กœ "Nope, try.." ์ฆ‰ ์‹คํŒจํ–ˆ์„ ๋•Œ ๋ฉ”์‹œ์ง€์™€ "Yeah you did it!"์ด๋ผ๋Š” ์„ฑ๊ณต ๋ฉ”์‹œ์ง€
๊ทธ๋ฆฌ๊ณ  ๋ฐ‘์— Crackme#1์œผ๋กœ JK3FJZh๋กœ ๋ฌธ์ž์—ด์ด ์žˆ๋Š” ๊ฑธ ๋ณด์•„..
๊ทธ๊ฒŒ ์ •๋‹ต์ผ ๊ฐ€๋Šฅ์„ฑ์ด ์žˆ๊ฒ ๋„ค์š” ํ™•์ธํ•ด๋ณด๋ฉด..

์„ฑ๊ณต!!


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CodeEngn.com [์ฝ”๋“œ์—”์ง„]

์ฝ”๋“œ์—”์ง„์€ ๊ตญ๋‚ด ๋ฆฌ๋ฒ„์Šค์—”์ง€๋‹ˆ์–ด๋ง ์ •๋ณด๊ณต์œ ๋ฅผ ์œ„ํ•ด 2007๋…„ ๋ถ€ํ„ฐ ๋ฆฌ๋ฒ„์Šค์—”์ง€๋‹ˆ์–ด๋ง ์ปจํผ๋Ÿฐ์Šค ๋ฐ ์„ธ๋ฏธ๋‚˜, ์›Œํฌ์ˆ์„ ํ˜„์—… ์‹ค๋ฌด์ž๋“ค๊ณผ ํ•จ๊ป˜ ์šด์˜ํ•˜๊ณ  ์žˆ๋Š” ๋น„์˜๋ฆฌ ์ปค๋ฎค๋‹ˆํ‹ฐ์ž…๋‹ˆ๋‹ค.

ch.codeengn.com

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