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논문 기본 정보

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학위논문
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홍표길 (부산가톨릭대학교, 부산가톨릭대학교 일반대학원)

지도교수
김도현
발행연도
2023
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부산가톨릭대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (3)

2023

이동식 저장매체의 은닉 영역에 대한 디지털 포렌식 연구
홍표길 컴퓨터공학과 2023.01 학위논문

2021

이동식 저장매체의 은닉 영역에 대한 안티 포렌식 대응 기술 연구
홍표길 ,  김도현 디지털포렌식연구 2021.09 학술저널
디지털 포렌식 관점에서 이동식 저장매체의 은닉영역 분석 연구
홍표길 ,  이대성 ,  김도현 한국정보통신학회 종합학술대회 논문집 2021.05 학술대회자료

초록· 키워드

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본 연구에서는 USB 플래시 드라이브에 은닉 영역을 생성하는 방식으로
안티포렌식 행위를 수행하는 도구들을 다방면으로 수집한 결과
FbinstTool, Bootice, EasyBoot를 발견했다. 위 도구들은 모두 USB 플래시
드라이브에 은닉 영역을 생성하는 기능이 존재한다. 그래서 위의 3가지 도
구를 사용하여 생성한 은닉 영역의 구조를 분석하여 은닉된 데이터의 메타
데이터 위치 및 실제 데이터 등을 확인하고 분석한 결과를 통해 은닉 영역
의 구조 분석 및 은닉된 데이터를 추출, 카빙(Carving)하는 알고리즘을 제
안한다. 그리고 제안한 알고리즘을 통해 구현한 탐지 도구도 소개한다. 또
한 EasyBoot는 FbinstTool과 Bootice와 다르게 은닉된 파티션으로 부팅하
는 기능이 존재한다. 본 연구에서는 은닉된 파티션에 Windows PE를 삽입
하여 부팅과정과 부팅 후의 남는 아티팩트들을 조사했다. 조사한 결과를
통해 Windows PE와 같은 Live OS의 아티팩트 추출 방안을 제시한다.
#안티포렌식 #데이터은닉 #은닉 영역 #이동식 저장매체

목차

목차
국문초록··················································································· ⅰ
표 목 차 ··················································································· ⅴ
그림목차··················································································· ⅵ
I. 서론 ··················································································· 1
1. 연구의 배경 ··············································································· 1
2. 연구의 목적 ··············································································· 2
II. 선행 연구 및 배경 지식 ·············································· 4
1. 선행 연구 ··················································································· 4
가. 안티포렌식 동향 ·································································· 4
나. 데이터 은닉에 대한 안티포렌식 연구···························· 5
2. 배경 지식 ··················································································· 7
가. 파일 시스템·········································································· 7
(1) 파티션 관리···································································· 9
(2) Bootloader····································································· 14
나. 실행파일 역공학 ································································ 15
(1) 정적 분석······································································ 16
(2) 동적 분석······································································ 22
III. 은닉 영역 파일 시스템 및
부트로더 분석····························································· 28
1. 은닉 영역 생성 도구 소개 ··················································· 28
가. FbinstTool·········································································· 28
나. Bootice················································································ 31
다. EasyBoot············································································ 34
2. 생성된 은닉 영역 구조 분석 ··············································· 37
가. FbinstTool ···················································································· 37
나. Bootice ·························································································· 45
다. EasyBoot ······················································································ 53
3. 은닉 운영체제 부팅 과정 분석··········································· 56
IV. 은닉 영역을 활용한 안티포렌식···························· 64
1. 데이터 은닉 안티포렌식 ······················································· 64
가. FbinstTool을 사용한 데이터 은닉 및 와이핑(Wiping) 기법····················· 64
나. Bootice로 생성한 은닉 영역에 파일 저장 기법 ······································ 65
다. Bootice 및 EasyBoot로 생성한 은닉 영역 탐지 회피 기법······················ 66
2. 은닉된 Bootable OS 안티포렌식 ········································ 68
V. 안티포렌식 대응·························································· 73
1. 은닉 영역 탐지 및 추출······················································· 73
가. 은닉 영역 탐지 ·································································· 74
나. 데이터 추출········································································ 76
다. 데이터 카빙(Carving)······················································ 77
2. 은닉된 Bootable OS 사용 흔적·········································· 78
가. NTFS 로그 파일 분석···················································· 79
나. NTFS ADS 분석······························································ 81
다. Windows 휴지통 아티팩트 분석··································· 83
3. 탐지 도구 ················································································· 85
VI. 고찰·············································································· 89
VII. 결론············································································· 90
참고문헌 ··········································································· 92
영문초록(Abstract) ························································ 96

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