tzuctf实训misc

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tzuctf做题记录Misc

沉睡的密码本

屏幕截图 2026-06-02 140013.png 首先先把文件下下来

unzip解压能看到一个叫“What kind of document is this?”的文件,没后缀

然后看看是什么文件类型

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aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ file "What kind of document is this?"
What kind of document is this?: CDFV2 Encrypted

看不懂,问ai 屏幕截图 2026-06-02 140720.png 然后尝试让ai用hashcat破解一下这个文件 屏幕截图 2026-06-02 143033.png 问ai这个是什么文件 屏幕截图 2026-06-02 143429.png ai直接读取了ppt里面的字符,我打开看了一下 屏幕截图 2026-06-02 143909.png 这种也就骗骗人类了Flag{okYOUWIN}

旧档案的裂缝

屏幕截图 2026-06-02 144217.png

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aloneowo@THINKBOOK:~/ctf$ cd ctf-framework
aloneowo@THINKBOOK:~/ctf/ctf-framework$ cd tmp
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ ls
'QR Code.png'                               brute_bunny2.py                                                        osint_icon
'What kind of document is this?'            cfd87e8503d67642084168bae658be429c3d424b9b7e24ee5b071ac584d05b84.zip   prison
"Where's bunny.exe"                         challenge.jpg                                                          user
 a12a8997-bd88-4b4f-b7fc-26bef215e7dd.jpg   decrypted_document                                                     优质牢房.zip
 attachment-10.zip                          extracted.zip                                                          牢房
 attachment.tar                             lsp-smoke                                                              镜厅中的回响
 brute_bunny.py                             office_hash.txt
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ tar attachment.tar
tar: You may not specify more than one '-Acdtrux', '--delete' or  '--test-label' option
Try 'tar --help' or 'tar --usage' for more information.
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ tar -xvf attachment.tar
tmp/
tmp/._none.zip
tmp/none.zip
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ cd tmp
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ ls
none.zip
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ unzip nome.zip
unzip:  cannot find or open nome.zip, nome.zip.zip or nome.zip.ZIP.
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ unzip none.zip
Archive:  none.zip
  inflating: res.zip                 
  inflating: woo.jpg                 
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ unzip res.zip
Archive:  res.zip
[res.zip] flag.txt password: aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ 
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ zipinfo -v res.zip
Archive:  res.zip
There is no zipfile comment.

End-of-central-directory record:
-------------------------------

  Zip archive file size:                       344 (0000000000000158h)
  Actual end-cent-dir record offset:           322 (0000000000000142h)
  Expected end-cent-dir record offset:         322 (0000000000000142h)
  (based on the length of the central directory and its expected offset)

  This zipfile constitutes the sole disk of a single-part archive; its
  central directory contains 2 entries.
  The central directory is 182 (00000000000000B6h) bytes long,
  and its (expected) offset in bytes from the beginning of the zipfile
  is 140 (000000000000008Ch).


Central directory entry #1:
---------------------------

  flag.txt

  offset of local header from start of archive:   0
                                                  (0000000000000000h) bytes
  file system or operating system of origin:      MS-DOS, OS/2 or NT FAT
  version of encoding software:                   2.0
  minimum file system compatibility required:     MS-DOS, OS/2 or NT FAT
  minimum software version required to extract:   2.0
  compression method:                             deflated
  compression sub-type (deflation):               normal
  file security status:                           encrypted
  extended local header:                          yes
  file last modified on (DOS date/time):          2019 Dec 2 20:22:22
  32-bit CRC value (hex):                         b0c530d8
  compressed size:                                29 bytes
  uncompressed size:                              17 bytes
  length of filename:                             8 characters
  length of extra field:                          36 bytes
  length of file comment:                         0 characters
  disk number on which file begins:               disk 1
  apparent file type:                             binary
  non-MSDOS external file attributes:             000000 hex
  MS-DOS file attributes (20 hex):                arc 

  The central-directory extra field contains:
  - A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes.  The first
    20 are:   00 00 00 00 01 00 18 00 01 02 2b 25 0b a9 d5 01 92 26 14 c9.

  There is no file comment.

Central directory entry #2:
---------------------------

  There are an extra -36 bytes preceding this file.

  secret.txt

  offset of local header from start of archive:   67
                                                  (0000000000000043h) bytes
  file system or operating system of origin:      MS-DOS, OS/2 or NT FAT
  version of encoding software:                   2.0
  minimum file system compatibility required:     MS-DOS, OS/2 or NT FAT
  minimum software version required to extract:   2.0
  compression method:                             deflated
  compression sub-type (deflation):               normal
  file security status:                           encrypted
  extended local header:                          yes
  file last modified on (DOS date/time):          2020 Jan 14 13:14:32
  32-bit CRC value (hex):                         483344c3
  compressed size:                                33 bytes
  uncompressed size:                              19 bytes
  length of filename:                             10 characters
  length of extra field:                          36 bytes
  length of file comment:                         0 characters
  disk number on which file begins:               disk 1
  apparent file type:                             binary
  non-MSDOS external file attributes:             000000 hex
  MS-DOS file attributes (20 hex):                arc 

  The central-directory extra field contains:
  - A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes.  The first
    20 are:   00 00 00 00 01 00 18 00 a8 7a d6 80 99 ca d5 01 a8 7a d6 80.

  There is no file comment.

aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ unzip ._none.zip
Archive:  ._none.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of ._none.zip or
        ._none.zip.zip, and cannot find ._none.zip.ZIP, period.
aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp/tmp$ 

通过多次解压和获取zipinfo可以看到,reszip里面有一个flag。 让ai分析一下这些文件的异常 屏幕截图 2026-06-02 152825.webp 估计这个res的密码和这个图片有关系。让ai分析了一下图片 屏幕截图 2026-06-02 153339.webp 直接拿到flag,估计前面那个res是幌子this is the flag

指尖残影

屏幕截图 2026-06-02 165023.webp 先把文件解压得到2个文件

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aloneowo@THINKBOOK:~/ctf/ctf-framework/tmp$ unzip 35352321b4a16f42ae3a2304464e7b9ee48ff5cd8ad97099d4c7bf123e3abb85.zip
Archive:  35352321b4a16f42ae3a2304464e7b9ee48ff5cd8ad97099d4c7bf123e3abb85.zip
  inflating: 233.rar                 
  inflating: key.ftm     

继续解压233.rar会发现文件损坏。

让ai看一下文件情况然后修一下 屏幕截图 2026-06-02 170306.webp 解压后看到了一个flag.txt还有一个png,那多半跟png有关

让ai处理一下图片

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