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一个CTF题目

Crixs 2026-06-11 16:12 1

一个CTF题目，各位佬帮忙看下，HEX 2 ASCII 看不到有效信息。各种 AI 都跑过了，解不出来。


有些佬的AI判断截断，原题在 CTF Playground - Veer Gosai 第五题


Challenge: Digital Forensics


Digital forensics involves investigating digital data to uncover hidden or deleted information.


Often, files contain metadata - data about the data - which can reveal interesting information about the file’s origin and content.


Examine the following text chunk, which has been extracted from a corrupted JPEG file:


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


Hidden in this hexadecimal representation is a string containing the flag. Your task is to find it.

最新回复 (15)
  • Linus Torvalds 06-11 16:22
    1楼

    opus4.8的结果


  • Crixs 楼主 06-11 16:26
    2楼

    我之前也试了下，一般 FLAG 都是 CTF 开头


  • 带珍珠耳环的少女 06-11 16:50
    3楼

  • chara_white 06-11 16:55
    4楼

    hex复制过来的时候是不是截断了

  • halfdone 06-11 16:55
    5楼

  • zdxbigegg 06-11 17:00
    6楼



    gpt-5.6

  • chara_white 06-11 17:04
    7楼


  • chara_white 06-11 17:14
    8楼

    这B题 ai出的吧,给的提示根本不对,根据提示是flag字符串直接在文件里能搜出来,根本不是


    查看页面F12可得到


            {
    
            id: 'forensics',
    
            title: 'Digital Forensics',
    
            description: 'Extract hidden information from data.',
    
            difficulty: 'hard',
    
            locked: true,
    
            completed: false,
    
            flag: 'CTF{metadata_matters}',
    
            content: `Digital forensics involves investigating digital data to uncover hidden or deleted information.
    

    
Often, files contain metadata - data about the data - which can reveal interesting information about the file's origin and content.
    

    
Examine the following text chunk, which has been extracted from a corrupted JPEG file:
    

    
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
    

    
Hidden in this hexadecimal representation is a string containing the flag. Your task is to find it.
    

    
Hint: Look for patterns in the hexadecimal data that might represent ASCII text.`,
    
            hints: [
    
                "Hexadecimal data often contains ASCII text that can be converted directly.",
    
                "Look for the pattern 'CTF{' in hex, which would be '435446{'",
    
                "The flag is spelled out in ASCII within the hexadecimal data - you just need to find where it starts."
    
            ]
    
        },



  • Lost 06-11 17:18
    9楼

    怪不得，第四题凯撒看了半天也不对啊，原来是这样。

  • Crixs 楼主 06-11 17:19
    10楼

    找到解了

  • Crixs 楼主 06-11 17:19
    11楼

    这个网站还有详细解析的步骤，看来不是出错了

  • 哈雷彗星 06-11 17:22
    12楼

    这第一句就在胡说八道啊


    435446 在原始串里根本没有

  • Crixs 楼主 06-11 17:22
    13楼

    说对了，看了一遍步骤跟实际对不上

  • Crixs 楼主 06-11 17:23
    14楼

    散了散了，这 SB 网站真是 AI 出题，全是幻觉

  • Lipura 06-11 17:26
    15楼

    确实有点无语了，根本不在题面里哈哈哈

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