[OverTheWire] bandit12 -> bandit13 풀이

bandit12 -> bandit13

 

[1] bandit13비밀번호는 data.txt 파일안에 있으며,hexdump ? 램 저장장치에 있는 컴퓨터 데이터를 16진수로 표시한 것으로 주로 디버깅이나 리버스 엔지니어링 할때 사용됨 xxd? 파일 or 표준 입력으로부터 hexdump를 만들거나 복원해주는 명령어로, 바이너리 형식에서 hexdump를 만들어 준다.

bandit12 -> bandit13

[2] Host Name : bandit.lads.overthewire.org   Port:2220

bandit12 -> bandit13

[3] bandit12@bandit:~$ ls -la 

     data.txt

[4] bandit12@bandit:~$ file data.txt

    data.txt ASCII text

[5] bandit12@bandit:~$ cd $(mktemp -d) cp /home/bandit12/diata.txt $(pwd) 

    data.txt 를 /tmp/tmp 복사한다.

[6] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ ls

    data.txt

[7]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ cat data.txt

      메모리 주소 : 16진수 ASCII값 나타단다.

bandit12 -> bandit13

[8]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ xxd -r data.txt > qqu

     xxd 커맨드를 이용해서 덤프파일을 복원한다.   ex)  -r | -revert

[9]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ ls

[10]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file qqu

[11]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ gzip -d qqu.gz

        No such file or directory 뜬다.  

[12]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ gzip -d ./qqu    

       ./ qqu: unknown suffix --ignored 

[13]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ mv ggu ggu.gz

[14]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ gzip -d ./qqu.gz

[15]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file qqu

       bzip2 compressed data, block size = 900k

[16]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ bzip2 -d ./qqu

       bzip2: Can't quess original name for ./qqu -- using ./qqu.out

[17]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file qqu.out

bandit12 -> bandit13

[18]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ mv ./qqu.out ./qqu.out.gz

[19]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ gzip -d qqu.out.gz

[20]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file qqu.out

       qqu.out: POSIX tar archive (GNU)

[21]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ tar -xvf ./qqu.out

       data5.bin

[22]  bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data5.bin

       data5.binPOSIX tar archive (GNU)

[23] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ tar -xvf ./data5.bin

      data6.bin

[24] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data6.bin

      data6.bin : bzip2 compressed data, block size = 900k

[25] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ bzip -d ./data6.bin

      bzip2: Can't guess original name for ./data6.bin --using ./data6.bin.out

[26] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data6.bin.out

       data6.bin : bzip2 compressed data, block size =900k

bandit12 -> bandit13

[27] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ bzip2 -d ./data6.bin

       bizp2: Can't quess original name for ./data6.bin -- using ./data6.bin.out

[28] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data6.bin.out

       data6.bin.out : POSIX tar archive (GNU)

[29] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ tar -xvf ./data6.bin.out

       data8.bin

[30] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ cat data8.bin

      bandit13 비밀번호가 확인이 안된다.

[31] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data8.bin

      data8.bin: gzip compression, from Unix,

[31] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ mv ./data8.bin ./data8.bin.gz

[32] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ gzip -d data8.bin.gz

[33] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ file data8.bin

      data8.bin: ASCII text

[34] bandit12@bandit:/tmp/tmp.fwLKyUfcHv$ cat data8.bin

     bandit13비밀번호가 확인된다.