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prolockdefender's Introduction

PROLOCK DEFENDER [Fileless ๋žœ์„ฌ์›จ์–ด PROLOCK ๋ฐฑ์‹ ]

์ฃผ์ œ : Fileless ๋žœ์„ฌ์›จ์–ด Prolock์„ ํƒ์ง€ํ•˜๊ณ  ๋ฐฉ์–ดํ•˜๋Š” ๋ฐฑ์‹  ๊ฐœ๋ฐœ
๊ฐœ๋ฐœ ๊ธฐ๊ฐ„ : 2020.04 ~ 2020.07

๋ชฉ์ฐจ

  1. ๋ฐฐ๊ฒฝ
  2. Prolock์˜ ๊ณต๊ฒฉ ์‹คํ–‰ ๊ณผ์ •
  3. ํƒ์ง€ ๊ธฐ์ˆ  ์†Œ๊ฐœ
  4. ๋ฐฉ์–ด ๊ธฐ์ˆ  ์†Œ๊ฐœ
  5. ๋™์˜์ƒ ์‹œ์—ฐ

1. ๋ฐฐ๊ฒฝ

  • 2019๋…„ 12์›” Prolock์˜ ๋ถ€๋ชจ์ธ ํŽ˜์ด๋กœ๋“œ ์ „์ฒด๊ฐ€ ์‰˜์ฝ”๋“œ์ธ Fileless ๋žœ์„ฌ์›จ์–ด PwndLocker๊ฐ€ ๋“ฑ์žฅํ•ฉ๋‹ˆ๋‹ค.
  • 2020๋…„ 2์›” PwndLocker์—์„œ ์•”ํ˜ธํ™” ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ํŒจ์น˜ํ•˜์—ฌ ์ƒ์œ„๋ฒ„์ „์ธ ProLock์œผ๋กœ ์ง„ํ™”ํ•ฉ๋‹ˆ๋‹ค.
  • ํ•ด์™ธ์—์„œ Prolock์œผ๋กœ ์ธํ•œ ์‹ค์ œ ํ”ผํ•ด์‚ฌ๋ก€๊ฐ€ ๋ฐœ์ƒํ–ˆ์Šต๋‹ˆ๋‹ค.
  • ๊ทธ๋Ÿฌ๋‚˜ ๊ตญ๋‚ด์—์„œ๋Š” Prolock์„ ํƒ์ง€์กฐ์ฐจ ํ•˜์ง€ ๋ชปํ•˜๋Š” ๋ฐฑ์‹ ์ด ์กด์žฌํ•ฉ๋‹ˆ๋‹ค.
  • ์ด์— Prolock์„ ํƒ์ง€ํ•˜๊ณ  ๋ฐฉ์–ดํ•˜๋Š” ๋ฐฑ์‹ ์„ ๊ฐœ๋ฐœํ•˜๊ณ  ์‹ถ์—ˆ์Šต๋‹ˆ๋‹ค.

2. Prolock์˜ ๊ณต๊ฒฉ ์‹คํ–‰ ๊ณผ์ •

  • Prolock์€ 4๊ฐœ์˜ ํŒŒ์ผ๋กœ ์กด์žฌํ•ฉ๋‹ˆ๋‹ค.

  • ๊ฐ ํŒŒ์ผ์€ ๋‹ค์Œ ๊ทธ๋ฆผ๊ณผ ๊ฐ™์€ ์ˆœ์œผ๋กœ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค.
  • run.bat ํŒŒ์ผ์ด ์‹คํ–‰๋˜๋ฉด Winmgr.xml ํŒŒ์ผ์„ ์ž‘์—… ์Šค์ผ€์ค„๋Ÿฌ์— ๋“ฑ๋กํ•˜๊ณ  ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค. ์‹คํ–‰๋˜๋Š” ์ˆœ๊ฐ„ run.bat ํŒŒ์ผ๊ณผ Winmgr.xml ํŒŒ์ผ์„ ์‚ญ์ œ์‹œํ‚ต๋‹ˆ๋‹ค.
  • Winmgr.bat ํŒŒ์ผ์ด ์‹คํ–‰๋˜๋ฉด clean.bat ํŒŒ์ผ์ด ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค.
  • clean.bat ํŒŒ์ผ์ด ์‹คํ–‰๋˜๋ฉด PowerShell์„ ์‹คํ–‰์‹œํ‚ค๊ณ  Winmgr.bmp ํŒŒ์ผ์—์„œ ๋ฐ”์ด๋„ˆ๋ฆฌ ์ฝ”๋“œ๋ฅผ ์ถ”์ถœํ•˜๊ณ  ๋ฉ”๋ชจ๋ฆฌ๋กœ ๋กœ๋“œํ•ฉ๋‹ˆ๋‹ค.
  • Winmgr.bmp ํŒŒ์ผ์—์„œ ์ถ”์ถœ๋œ ๋ฐ”์ด๋„ˆ๋ฆฌ ์ฝ”๋“œ๋Š” ์‰˜์ฝ”๋“œ๋ฅผ ๊ตฌ์„ฑํ•˜๊ณ  ์ด๋Š” ๋žœ์„ฌ์›จ์–ด๋ฅผ ๋™์ž‘์‹œํ‚ต๋‹ˆ๋‹ค.

3. ํƒ์ง€ ๊ธฐ์ˆ  ์†Œ๊ฐœ

  • ํ˜„์žฌ Prolock์˜ ๊ณต๊ฒฉ์ด ์‹คํ–‰ ์ค‘์ธ ํŒŒ์›Œ์‰˜์„ ํŠน์ •ํ•ฉ๋‹ˆ๋‹ค.
  • Prolock์ด ์ˆ˜ํ–‰๋˜๋Š” ํŒŒ์›Œ์‰˜์€ cmd๋ฅผ ๋ถ€๋ชจ๋กœ ๊ฐ–๊ณ , ์ด cmd๋Š” svchost.exe๋ฅผ ๋ถ€๋ชจ๋กœ ๊ฐ–์Šต๋‹ˆ๋‹ค.

  • Prolock์€ ์„ธ ๊ฐ€์ง€ API์™€ ํ•œ ๊ฐ€์ง€ ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค.
  • ํŒŒ์›Œ์‰˜์— ์ž…๋ ฅ๋˜๋Š” ๋ช…๋ น์–ด ๋กœ๊ทธ๋ฅผ ์‹ค์‹œ๊ฐ„ ๋ชจ๋‹ˆํ„ฐ๋งํ•˜์—ฌ Prolock์˜ ๊ณต๊ฒฉ์ด ์‹œ์ž‘๋˜๋Š” ์ˆœ๊ฐ„์„ ํ™•์ธํ•ฉ๋‹ˆ๋‹ค.

4. ๋ฐฉ์–ด ๊ธฐ์ˆ  ์†Œ๊ฐœ

  • ์ด์ „์— ํŠน์ •ํ–ˆ๋˜ ํŒŒ์›Œ์‰˜์„ ๊ฐ•์ œ ์ข…๋ฃŒํ•˜์—ฌ ํŒŒ์›Œ์‰˜์„ ์ฐจ๋‹จํ•ฉ๋‹ˆ๋‹ค.

  • Prolock์˜ ์ฃผ์š” ํŽ˜์ด๋กœ๋“œ๊ฐ€ ์‹œ์ž‘๋˜๋ฉด ๋ฉ”๋ชจ๋ฆฌ ์‚ฌ์šฉ๋Ÿ‰์ด ์ˆœ๊ฐ„์ ์œผ๋กœ ์ฆํญ๋ฉ๋‹ˆ๋‹ค. ๋ชจ๋‹ˆํ„ฐ๋งํ•˜์—ฌ ์ด ์ˆœ๊ฐ„์€ ํ™•์ธํ•ฉ๋‹ˆ๋‹ค.
  • Prolock์€ Fileless ํŠน์„ฑ์„ ์œ ์ง€ํ•˜๊ธฐ ์œ„ํ•ด ์ž์ฒด์ ์œผ๋กœ Prolock๊ณผ ๊ด€๋ จ๋œ ๋ชจ๋“  ํŒŒ์ผ์„ ์‚ญ์ œํ•ฉ๋‹ˆ๋‹ค.
  • Prolock์€ ๋ชจ๋“  ํŒŒ์ผ์„ ์‚ญ์ œ ํ›„ ๋ณธ๊ฒฉ์ ์ธ ๋žœ์„ฌ์›จ์–ด ๊ณต๊ฒฉ์„ ์‹œ์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ๋ชจ๋“  ํŒŒ์ผ ์‚ญ์ œ ์‹œ์ ๊ณผ ๊ณต๊ฒฉ ์‹œ์  ์ค‘๊ฐ„์— ํŒŒ์›Œ์‰˜์„ ์ฐจ๋‹จํ•˜์—ฌ ๋žœ์„ฌ์›จ์–ด ๊ณต๊ฒฉ์„ ๋ฐฉ์–ดํ•ฉ๋‹ˆ๋‹ค.
  • Prolock์˜ ํŠน์„ฑ์„ ํ†ตํ•ด Prolock ๋ฐฉ์–ด์— ์„ฑ๊ณตํ•ฉ๋‹ˆ๋‹ค.

5. ๋™์˜์ƒ ์‹œ์—ฐ

IU(์•„์ด์œ ) _ Into the I-LAND

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