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<feed xmlns="http://www.w3.org/2005/Atom">
  <title>reCAPTCHA the Flag</title>
  <icon>http://recaptcha.team/icon.png</icon>
  
  <link href="http://recaptcha.team/atom.xml" rel="self"/>
  
  <link href="http://recaptcha.team/"/>
  <updated>2025-03-20T03:39:38.100Z</updated>
  <id>http://recaptcha.team/</id>
  
  <author>
    <name>reCAPTCHA the Flag</name>
    
  </author>
  
  <generator uri="https://hexo.io/">Hexo</generator>
  
  <entry>
    <title>Web Cheat Sheet</title>
    <link href="http://recaptcha.team/web/"/>
    <id>http://recaptcha.team/web/</id>
    <published>2025-03-20T03:39:38.100Z</published>
    <updated>2025-03-20T03:39:38.100Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;h3 id=&quot;Websites&quot;&gt;&lt;a href=&quot;#Websites&quot; class=&quot;headerlink&quot; title=&quot;Websites&quot;&gt;&lt;/a&gt;Websites&lt;/h3&gt;&lt;h6 id=&quot;Overall-Reference&quot;&gt;&lt;a</summary>
        
      
    
    
    
    <category term="cheatsheets" scheme="http://recaptcha.team/categories/cheatsheets/"/>
    
    
    <category term="web" scheme="http://recaptcha.team/tags/web/"/>
    
  </entry>
  
  <entry>
    <title>Handoff</title>
    <link href="http://recaptcha.team/picoCTF-2025/pwn/Handoff/"/>
    <id>http://recaptcha.team/picoCTF-2025/pwn/Handoff/</id>
    <published>2025-03-09T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.100Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;No description, no hints, very boring :(&lt;/p&gt;
&lt;hr&gt;
&lt;h1 id=&quot;Initial-Analysis&quot;&gt;&lt;a href=&quot;#Initial-Analysis&quot; class=&quot;headerlink&quot;</summary>
        
      
    
    
    
    <category term="PicoCTF-2025" scheme="http://recaptcha.team/categories/PicoCTF-2025/"/>
    
    
    <category term="Binary-Exploitation" scheme="http://recaptcha.team/tags/Binary-Exploitation/"/>
    
  </entry>
  
  <entry>
    <title>Mimirev</title>
    <link href="http://recaptcha.team/PwnMe-CTF-2025/Reverse/Mimirev/"/>
    <id>http://recaptcha.team/PwnMe-CTF-2025/Reverse/Mimirev/</id>
    <published>2025-03-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.097Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;A new and obscure programming language, MimiLang, has surfaced. It runs on a peculiar interpreter, but something about it feels… off.</summary>
        
      
    
    
    
    <category term="PwnMe-CTF-Quals-2024" scheme="http://recaptcha.team/categories/PwnMe-CTF-Quals-2024/"/>
    
    
    <category term="Hard Compiler Crypto" scheme="http://recaptcha.team/tags/Hard-Compiler-Crypto/"/>
    
  </entry>
  
  <entry>
    <title>baby pwn 2</title>
    <link href="http://recaptcha.team/UofT-CTF-2025/baby-pwn-2/"/>
    <id>http://recaptcha.team/UofT-CTF-2025/baby-pwn-2/</id>
    <published>2025-01-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.099Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Here’s a baby pwn challenge for you to try out. Can you get the flag?&lt;/p&gt;
&lt;p&gt;nc 34.162.142.123 5000&lt;/p&gt;
&lt;p&gt;Author: atom&lt;/p&gt;
&lt;p&gt;&lt;a</summary>
        
      
    
    
    
    <category term="UofT-CTF-2025" scheme="http://recaptcha.team/categories/UofT-CTF-2025/"/>
    
    
    <category term="pwn buffer-overflow ret2win" scheme="http://recaptcha.team/tags/pwn-buffer-overflow-ret2win/"/>
    
  </entry>
  
  <entry>
    <title>baby pwn</title>
    <link href="http://recaptcha.team/UofT-CTF-2025/baby-pwn/"/>
    <id>http://recaptcha.team/UofT-CTF-2025/baby-pwn/</id>
    <published>2025-01-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.099Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Here’s a baby pwn challenge for you to try out. Can you get the flag?&lt;/p&gt;
&lt;p&gt;nc 34.162.142.123 5000&lt;/p&gt;
&lt;p&gt;Author: atom&lt;/p&gt;
&lt;p&gt;&lt;a</summary>
        
      
    
    
    
    <category term="UofT-CTF-2025" scheme="http://recaptcha.team/categories/UofT-CTF-2025/"/>
    
    
    <category term="pwn buffer-overflow ret2win" scheme="http://recaptcha.team/tags/pwn-buffer-overflow-ret2win/"/>
    
  </entry>
  
  <entry>
    <title>counting sort</title>
    <link href="http://recaptcha.team/UofT-CTF-2025/counting-sort/"/>
    <id>http://recaptcha.team/UofT-CTF-2025/counting-sort/</id>
    <published>2025-01-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.100Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Did you know that the best time complexity for a sorting algorithm is O(n). This is an example service that demonstrates this by sorting</summary>
        
      
    
    
    
    <category term="UofT-CTF-2025" scheme="http://recaptcha.team/categories/UofT-CTF-2025/"/>
    
    
    <category term="pwn out-of-bounds write-what-where" scheme="http://recaptcha.team/tags/pwn-out-of-bounds-write-what-where/"/>
    
  </entry>
  
  <entry>
    <title>echo</title>
    <link href="http://recaptcha.team/UofT-CTF-2025/echo/"/>
    <id>http://recaptcha.team/UofT-CTF-2025/echo/</id>
    <published>2025-01-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.100Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Yet another echo service. However, the service keeps printing stack smashing detected for some reason, can you help me figure it</summary>
        
      
    
    
    
    <category term="UofT-CTF-2025" scheme="http://recaptcha.team/categories/UofT-CTF-2025/"/>
    
    
    <category term="pwn buffer-overflow format-string got-overwrite" scheme="http://recaptcha.team/tags/pwn-buffer-overflow-format-string-got-overwrite/"/>
    
  </entry>
  
  <entry>
    <title>i like mcdonalds</title>
    <link href="http://recaptcha.team/Backdoor-CTF-2024/crypto/mcdonalds/"/>
    <id>http://recaptcha.team/Backdoor-CTF-2024/crypto/mcdonalds/</id>
    <published>2024-12-24T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;My friend has created his own hashing service and has given it to me to crack it, can you help me with it. He has promised me a burger</summary>
        
      
    
    
    
    <category term="Backdoor-CTF-2024" scheme="http://recaptcha.team/categories/Backdoor-CTF-2024/"/>
    
    
    <category term="crypto hash mac" scheme="http://recaptcha.team/tags/crypto-hash-mac/"/>
    
  </entry>
  
  <entry>
    <title>cursed credential</title>
    <link href="http://recaptcha.team/Backdoor-CTF-2024/forensics/cursed-credential/"/>
    <id>http://recaptcha.team/Backdoor-CTF-2024/forensics/cursed-credential/</id>
    <published>2024-12-24T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;I forgot my Browser’s saved password although a friend of mine tells that I can find it if I know my master key. The problem is I dont</summary>
        
      
    
    
    
    <category term="Backdoor-CTF-2024" scheme="http://recaptcha.team/categories/Backdoor-CTF-2024/"/>
    
    
    <category term="forensics password-cracking hashcat rockyou" scheme="http://recaptcha.team/tags/forensics-password-cracking-hashcat-rockyou/"/>
    
  </entry>
  
  <entry>
    <title>decompressor</title>
    <link href="http://recaptcha.team/Backdoor-CTF-2024/misc/decompressor/"/>
    <id>http://recaptcha.team/Backdoor-CTF-2024/misc/decompressor/</id>
    <published>2024-12-24T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Can you decompress the flag without the codes?  &lt;/p&gt;
&lt;p&gt;nc 34.42.147.172 8009  &lt;/p&gt;
&lt;p&gt;Author : ph03n1x  &lt;/p&gt;
&lt;p&gt;&lt;a</summary>
        
      
    
    
    
    <category term="Backdoor-CTF-2024" scheme="http://recaptcha.team/categories/Backdoor-CTF-2024/"/>
    
    
    <category term="misc compression huffman-coding" scheme="http://recaptcha.team/tags/misc-compression-huffman-coding/"/>
    
  </entry>
  
  <entry>
    <title>WaaS</title>
    <link href="http://recaptcha.team/n00bz-CTF-2024/WaaS/"/>
    <id>http://recaptcha.team/n00bz-CTF-2024/WaaS/</id>
    <published>2024-08-04T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.100Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;h2 id=&quot;Writing-as-a-Service-Author-NoobMaster-NoobHacker&quot;&gt;&lt;a href=&quot;#Writing-as-a-Service-Author-NoobMaster-NoobHacker&quot; class=&quot;headerlink&quot;</summary>
        
      
    
    
    
    <category term="n00bz-CTF-2024" scheme="http://recaptcha.team/categories/n00bz-CTF-2024/"/>
    
    
    <category term="web" scheme="http://recaptcha.team/tags/web/"/>
    
  </entry>
  
  <entry>
    <title>determined</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/crypto/determined/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/crypto/determined/</id>
    <published>2024-07-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;script
  src=&quot;https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML&quot;
  type=&quot;text/javascript&quot;&gt;
&lt;/script&gt;

&lt;p&gt;“It</summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="crypto rsa gcd" scheme="http://recaptcha.team/tags/crypto-rsa-gcd/"/>
    
  </entry>
  
  <entry>
    <title>groups</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/crypto/groups/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/crypto/groups/</id>
    <published>2024-07-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;script
  src=&quot;https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML&quot;
  type=&quot;text/javascript&quot;&gt;
&lt;/script&gt;

&lt;p&gt;My</summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="crypto carmichael dlp" scheme="http://recaptcha.team/tags/crypto-carmichael-dlp/"/>
    
  </entry>
  
  <entry>
    <title>naptime</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/crypto/naptime/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/crypto/naptime/</id>
    <published>2024-07-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;script
  src=&quot;https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML&quot;
  type=&quot;text/javascript&quot;&gt;
&lt;/script&gt;

&lt;p&gt;I’m</summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="crypto knapsack merkle-hellman byte-by-byte" scheme="http://recaptcha.team/tags/crypto-knapsack-merkle-hellman-byte-by-byte/"/>
    
  </entry>
  
  <entry>
    <title>snore signatures</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/crypto/snore-signatures/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/crypto/snore-signatures/</id>
    <published>2024-07-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;script
  src=&quot;https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML&quot;
 </summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="crypto schnorr-signature forgery" scheme="http://recaptcha.team/tags/crypto-schnorr-signature-forgery/"/>
    
  </entry>
  
  <entry>
    <title>without a trace</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/crypto/without-a-trace/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/crypto/without-a-trace/</id>
    <published>2024-07-02T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;script
  src=&quot;https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML&quot;
  type=&quot;text/javascript&quot;&gt;
&lt;/script&gt;

&lt;p&gt;Gone</summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="crypto" scheme="http://recaptcha.team/tags/crypto/"/>
    
  </entry>
  
  <entry>
    <title>Fare Evasion</title>
    <link href="http://recaptcha.team/UIU-CTF-2024/web/Fare%20Evasion/"/>
    <id>http://recaptcha.team/UIU-CTF-2024/web/Fare%20Evasion/</id>
    <published>2024-06-29T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.098Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;SIGPwny Transit Authority needs your fares, but the system is acting a tad odd. We’ll let you sign your tickets this time!&lt;/p&gt;
&lt;h2</summary>
        
      
    
    
    
    <category term="UIUCTF-2024" scheme="http://recaptcha.team/categories/UIUCTF-2024/"/>
    
    
    <category term="web" scheme="http://recaptcha.team/tags/web/"/>
    
  </entry>
  
  <entry>
    <title>cha-cha slide</title>
    <link href="http://recaptcha.team/BCA-CTF-2024/crypto/cha-cha-slide/"/>
    <id>http://recaptcha.team/BCA-CTF-2024/crypto/cha-cha-slide/</id>
    <published>2024-06-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;I made this cool service that lets you protect your secrets with state-of-the-art encryption. It’s so secure that we don’t even tell you</summary>
        
      
    
    
    
    <category term="BCA-CTF-2024" scheme="http://recaptcha.team/categories/BCA-CTF-2024/"/>
    
    
    <category term="crypto chacha20" scheme="http://recaptcha.team/tags/crypto-chacha20/"/>
    
  </entry>
  
  <entry>
    <title>cinnamon dynamics</title>
    <link href="http://recaptcha.team/BCA-CTF-2024/crypto/cinnamon-dynamics/"/>
    <id>http://recaptcha.team/BCA-CTF-2024/crypto/cinnamon-dynamics/</id>
    <published>2024-06-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;Cinnamon Dynamics, an innovative technology company, provides a service for the public to execute short scripts to query some limited</summary>
        
      
    
    
    
    <category term="BCA-CTF-2024" scheme="http://recaptcha.team/categories/BCA-CTF-2024/"/>
    
    
    <category term="crypto sha256 length-extension-attack" scheme="http://recaptcha.team/tags/crypto-sha256-length-extension-attack/"/>
    
  </entry>
  
  <entry>
    <title>encryptor shop</title>
    <link href="http://recaptcha.team/BCA-CTF-2024/crypto/encryptor-shop/"/>
    <id>http://recaptcha.team/BCA-CTF-2024/crypto/encryptor-shop/</id>
    <published>2024-06-12T00:00:00.000Z</published>
    <updated>2025-03-20T03:39:38.096Z</updated>
    
    
      
      
        
        
    <summary type="html">&lt;p&gt;After realizing how insecure the systems of many companies are (they’re always getting hacked), I decided to start offering Encryption</summary>
        
      
    
    
    
    <category term="BCA-CTF-2024" scheme="http://recaptcha.team/categories/BCA-CTF-2024/"/>
    
    
    <category term="crypto rsa gcd" scheme="http://recaptcha.team/tags/crypto-rsa-gcd/"/>
    
  </entry>
  
</feed>
