๋ณธ๋ฌธ ๋ฐ”๋กœ๊ฐ€๊ธฐ

๋ถ„๋ฅ˜ ์ „์ฒด๋ณด๊ธฐ145

[ํ›„๊ธฐ] IEQ์ธํ„ฐ๋„ท์œค๋ฆฌ์ž๊ฒฉ ์ง€๋„์‚ฌ ํ•ฉ๊ฒฉ๐Ÿ’ซ ์ง€๋‚œ 2020๋…„ 12์›”์— ์ธํ„ฐ๋„ท์œค๋ฆฌ์ž๊ฒฉ ์ง€๋„์‚ฌ ์ž๊ฒฉ์ฆ์„ ์ทจ๋“ํ–ˆ๋‹ค ์‘์‹œ ์ž๊ฒฉ์— ์ œํ•œ์ด ์—†์œผ๋ฉฐ, it ๊ด€๋ จ ์ „๊ณต์ด๋ผ๋ฉด ์ถฉ๋ถ„ํžˆ ์ทจ๋“ํ•  ์ˆ˜ ์žˆ๋Š” ์ž๊ฒฉ์ฆ์ด๊ธฐ ๋•Œ๋ฌธ์— ๋ถ€๋‹ด์—†์ด ์‹ ์ฒญํ•  ์ˆ˜ ์žˆ๋‹ค ๋งํฌ : license.kpc.or.kr/nasec/qlfint/qlfint/selectIeqinfomg.do ์‹œํ—˜๊ณผ๋ชฉ์ด ์ด๋ก (1์ฐจ) / ์‹ค๋ฌด(2์ฐจ)๋กœ ๋‚˜๋‰˜์–ด์ ธ ์žˆ๋Š”๋ฐ, ์ด๋ก ๊ณผ ์‹ค๋ฌด๋ฅผ ํ•˜๋ฃจ์— ๋ณธ๋‹ค ๋Œ€์‹  ์‹ค๋ฌด(2์ฐจ)์—๋Š” ์„œ๋‹ตํ˜•์ด ์žˆ๋Š”๋ฐ ๋ฐฐ์ ์ด ์„ ํƒํ˜•๋ณด๋‹ค ๋” ํฌ๊ธฐ ๋•Œ๋ฌธ์— ์œ ์˜ํ•ด์„œ ๊ณต๋ถ€ํ•ด์•ผ ํ•œ๋‹ค ๊ต์žฌ๋Š” ์•„๋ž˜์— ์žˆ๋Š” ๊ต์žฌ 2020 ๊ฐœ์ •ํŒ์œผ๋กœ ๊ณต๋ถ€ํ–ˆ๊ณ , ๋‹ค๋ฅธ ๊ต์žฌ๋„ ์ฐพ์•„๋ณธ ๊ฒฐ๊ณผ ieq ์ง€๋„์‚ฌ๋ฅผ ์ค€๋น„ํ•˜๊ธฐ ์œ„ํ•œ ๊ต์žฌ๋กœ๋Š” ์ด ๊ต์žฌ๊ฐ€ ์ „๋ถ€์ธ ๊ฒƒ ๊ฐ™๋‹ค ๋งˆ์ง€๋ง‰์œผ๋กœ ieq ์ž๊ฒฉ์ฆ ํ™ˆํŽ˜์ด์ง€์—์„œ ์‹œํ—˜์ •๋ณด - ๊ธฐ์ถœ/์ƒ˜ํ”Œ๋ฌธ์ œ๊ฐ€ ์žˆ๋Š”๋ฐ ์ด ํŒŒ์ผ์„ ๋‹ค์šด๋ฐ›์•„ .. 2021. 1. 13.
[ctf-d] woodstock-1 ์ด๋ฒˆ ๋ฌธ์ œ๋Š” ํ™•์žฅ์ž๊ฐ€ pcpang์ธ ๊ฒƒ์„ ํ†ตํ•ด์„œ ์™€์ด์–ด์ƒคํฌ๋ฅผ ์ด์šฉํ•ด์•ผ๊ฒ ๋‹ค๋Š” ์ƒ๊ฐ์ด ๋“ค์—ˆ๋‹ค ๊ทธ๋ฆฌ๊ณ  ํ‚ค ํฌ๋งท์€ BITSCTF{(key)} ์ด๋‹ค * ์™€์ด์–ด์ƒคํฌ ๋‹ค์šด๋กœ๋“œ ํ™ˆํŽ˜์ด์ง€ www.wireshark.org/download.html Wireshark · Download Riverbed is Wireshark's primary sponsor and provides our funding. They also make great products that fully integrate with Wireshark. I have a lot of traffic... ANSWER: SteelCentral™ AppResponse 11 • Full stack analysis – from packets to pages • Ric .. 2020. 12. 7.
[ctf-d] ์ €๋Š” ์ด๋ฏธ์ง€์—์„œ ์–ด๋–ค ๊ฒƒ์„... ์ด๋ฒˆ ๋ฌธ์ œ๋Š” ์ด๋ฏธ์ง€์— ๋ญ”๊ฐ€ ๋‹ต์ด ์žˆ์„ ๊ฒƒ ๊ฐ™์€ ๋ฌธ์ œ์ด๋‹ค. logo.gif ํŒŒ์ผ์„ ๋‹ค์šด๋ฐ›์•˜๋‹ค ๊ทผ๋ฐ gif ํŒŒ์ผ์€ ๋ณดํ†ต ์›€์งค์šฉ(?)์ด๋ผ ์›€์ง์—ฌ์•ผ ํ•˜๋Š”๋ฐ ์•„๋ž˜ ํ™”๋ฉด์—์„œ ์•„๋ฌด ๊ฒƒ๋„ ๋ฐ”๋€Œ์ง€ ์•Š์•˜๋‹ค ๊ทธ๋ž˜์„œ ๋‹ค๋ฅธ ์—ฐ๊ฒฐ ํ”„๋กœ๊ทธ๋žจ(๊ทธ๋ฆผํŒ)์„ ์ด์šฉํ•ด ์—ด์—ˆ๋Š”๋ฐ ๋ฐ”๋กœ ๋‹ต์ด ๋‚˜์™€๋ฒ„๋ ธ๋‹ค... ์ผ๋‹จ ํ™•์‹คํžˆ ๋งž๋Š”์ง€๋Š” ๋ชจ๋ฅด๊ฒ ์–ด์„œ boy_this_goes_by_so_fast ๋ฅผ ์ž…๋ ฅํ•œ ํ›„ ์ œ์ถœํ–ˆ๋”๋‹ˆ ์ •๋‹ต์ด๋ผ๋Š” ํ‘œ์‹œ๊ฐ€ ๋‚˜์™”๋‹ค ์ด๋ ‡๊ฒŒ ํ‘ธ๋Š” ๋ฌธ์ œ๊ฐ€ ์•„๋‹Œ ๊ฒƒ ๊ฐ™์€๋ฐ... ์ผ๋‹จ ํ’€๊ธด ํ’€์—ˆ๋‹ค.. 2020. 12. 7.
[ctf-d] ์‚ฌ์ง„ ์†์—์„œ ๋นจ๊ฐ„์ƒ‰์ด... ์ด๋ฒˆ ๋ฌธ์ œ๋Š” png ํŒŒ์ผ์„ ์ด์šฉํ•ด์„œ ํ‘ธ๋Š” ๋ฌธ์ œ์ด๋‹ค ๋นจ๊ฐ„์ƒ‰์„ ์ค‘์š”ํ•˜๊ฒŒ ๋ด์•ผ ํ•  ๊ฒƒ ๊ฐ™๋‹ค incoherency.co.uk/image-steganography/#unhide Image Steganography Each channel (red, green, blue) of each pixel in an image is represented by an 8-bit value. To hide the secret image inside the cover image, we replace the n least significant bits of the cover pixel value with the same number of most significant bits from incoherency.co.uk stegsolve.. 2020. 12. 4.
[ctf-d] ์ €ํฌ๋Š” ์ด ๋ฌธ์„œ๋ฅผ ์ฐพ์•˜์Šต๋‹ˆ๋‹ค. ์ด๋ฒˆ ๋ฌธ์ œ๋Š” docx ํŒŒ์ผ ์•ˆ์— ํ”Œ๋ž˜๊ทธ๋ฅผ ์ฐพ์•„์•ผ ํ•˜๋Š” ๋ฌธ์ œ์ด๋‹ค. ์ผ๋‹จ file.docx๋ฅผ ๋‹ค์šด๋ฐ›๊ณ  ์—ด์–ด๋ณด๋‹ˆ file์˜ ์ผ๋ถ€ ์ฝ˜ํ…์ธ ๋ฅผ ์ฝ์„ ์ˆ˜ ์—†๋‹ค๋ผ๋Š” ๊ฒฝ๊ณ ์ฐฝ์ด ๋‚˜์™”๊ณ  ์˜ˆ(Y)๋ฅผ ๋ˆŒ๋ €๋”๋‹ˆ This is not the flag you're looking for. ์ด๋ผ๋Š” ๋ฌธ๊ตฌ๊ฐ€ ๋‚˜์™”๋‹ค ์œ„ ๋ฐฉ๋ฒ•์œผ๋กœ ๋‹ต์ด ๋‚˜์˜ค์ง€ ์•Š์ž ํ—ฅ์Šค ์—๋””ํ„ฐ๋ฅผ ์‚ฌ์šฉํ–ˆ๋‹ค ๊ทธ๋ฆฌ๊ณ  ์ญ‰ ์Šคํฌ๋กคํ•ด๋ณด๋‹ˆ ์Šคํฌ๋กค ํ•œ ๋ถ€๋ถ„์€ this_would_be_the_flag_you_are_looking_for ์ด๋ผ๋Š” ๋ฌธ์ž์—ด์ด๋‹ค. ๋”ฐ๋ผ์„œ ์ด ๋ฌธ์ž์—ด์„ ์ž…๋ ฅํ•˜๋‹ˆ ์ •๋‹ต์ด๋ผ๊ณ  ๋‚˜์™”๋‹ค! 2020. 12. 2.
[ctf-d] ์ €๋Š” ํ”Œ๋ž˜๊ทธ๋ฅผ ์ด ํŒŒ์ผ์—... ์ด ๋ฌธ์ œ์—์„œ ์–ป์„ ์ˆ˜ ์žˆ๋Š” ๊ฑด ํŒŒ์ผ์— ํ”Œ๋ž˜๊ทธ๊ฐ€ ์กด์žฌํ•˜๊ณ , ํ‚ค ํฌ๋งท์ด ABCTF{(key)}๋ผ๋Š” ๊ฒƒ์ด๋‹ค ์ด ๋ฌธ์ œ๋ฅผ ํ‘ธ๋Š” ๋ฐฉ๋ฒ•์„ 1) ์†์„ฑ, 2) ํ—ฅ์Šค ์—๋””ํ„ฐ, 3) ์Šคํ…Œ๊ฐ€๋…ธ๊ทธ๋ž˜ํ”ผ๋กœ ์œ ์ถ”ํ–ˆ๋Š”๋ฐ ์ผ๋‹จ ํ—ฅ์Šค ์—๋””ํ„ฐ๋ฅผ ๋จผ์ € ์ด์šฉํ–ˆ๋‹ค ์ฐพ๊ธฐ-์ฐพ๊ธฐ ๊ธฐ๋Šฅ์„ ์ด์šฉํ•ด์„œ ํ…์ŠคํŠธ ๋ฌธ์ž์—ด ๊ฒ€์ƒ‰ ๋Œ€์ƒ์— ABCTF ๋ผ๊ณ  ์“ด ๋‹ค์Œ์— ์ˆ˜๋ฝ ๋ฒ„ํŠผ์„ ๋ˆŒ๋ €๋‹ค ๊ทธ๋Ÿฌ๋‹ˆ๊นŒ ์ด ๋ถ€๋ถ„์ด ABCTF์„ ํฌํ•จํ•˜๊ณ  ์žˆ๋‹ค๊ณ  ๋ฐ”๋กœ ๋‚˜์™”๋‹ค ํ‚ค ํฌ๋งท๋Œ€๋กœ ๋‹ต์„ ์Šคํฌ๋กคํ•˜๋ฉด ABCTF{forensics_1_tooo_easy?} ์ด ๋‚˜์˜จ๋‹ค ์œ„์—์„œ ์ž‘์„ฑํ•œ ๋‹ต ๊ทธ๋Œ€๋กœ ์ž…๋ ฅํ•˜๋ฉด ์ •๋‹ต์ด๋ผ๊ณ  ๋‚˜์˜จ๋‹ค 2020. 12. 2.