> For the complete documentation index, see [llms.txt](https://docs.cooku222.kr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cooku222.kr/security/crypto/dreamhack/dreamhack-base64-10-times.md).

# \[DreamHack] Base64 10 Times

#### 문제 링크

{% embed url="<https://dreamhack.io/wargame/challenges/1648>" %}

#### 문제

<figure><img src="https://blog.kakaocdn.net/dna/bvGVcr/btsNh1cqyMT/AAAAAAAAAAAAAAAAAAAAAPI2dCRf7J7sLpLWPRGb-qZ-l7s366G2Xdwswkhh2U8-/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=ktzZe%2F4dqQGlqAgYl621dNtACdE%3D" alt="" height="395" width="1102"><figcaption></figcaption></figure>

&#x20;

#### WriteUp

문제 보니까 감이 오겠지만,,, 대놓고 base64 처럼 보이는 길다란 암호문을 주는데 10x... 즉 base64 디코딩을 10번 돌리란 뜻이다.(캡처하느라 손 아팠음)

<figure><img src="https://blog.kakaocdn.net/dna/IzgUc/btsNiprtDHk/AAAAAAAAAAAAAAAAAAAAAPqtcEWMl9X9Fg0gUC1crilAuCFwvdoFjty1tdgVIHTp/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=i86naEL9uvfQFOi%2BeYz%2BRQr6Avc%3D" alt="" height="593" width="1206"><figcaption><p>첫 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/bZLDJc/btsNiJ3Z5jk/AAAAAAAAAAAAAAAAAAAAAEUKUWQT6CaZf2OQzQVoxmgY35U-yHjVQU7rKheangiH/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=7uSA%2B1oIiORVaZ92QyUgafRksAs%3D" alt="" height="734" width="1218"><figcaption><p>두 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/lY28i/btsNisO0kVT/AAAAAAAAAAAAAAAAAAAAAPMwTc19Q9-r7Y-Lnltmiy6PPFSISqTqIYIogHu9_yOy/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=Zkk3iS1x1Ufq4%2Bf%2BtGZuiXlQBMQ%3D" alt="" height="656" width="1211"><figcaption><p>세 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/cKBM6h/btsNi2vbhnN/AAAAAAAAAAAAAAAAAAAAANvhZA3I8x-5IszX8iFF7CDbB7n_Bee3zt4tlBgu980L/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=rUkRCWFcrtqBCiBsACRiQdQmk00%3D" alt="" height="718" width="1217"><figcaption><p>네 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/cH2uWL/btsNi65qsmD/AAAAAAAAAAAAAAAAAAAAAMvYvOWHRX57Rb7bz3UyAY1EVFiW1V_s_1Sf9cPhGe6c/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=Tllo8clVkLop7%2BKbl8GZLqHAFXg%3D" alt="" height="636" width="1213"><figcaption><p>다섯 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/mDXiN/btsNhKiRrs1/AAAAAAAAAAAAAAAAAAAAAOPNQMcXUmj82hKCKap65dBoqmRLmkHdx2otUILfoSms/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=6Ls33IbNX0jtPkV9OpO33rO03Dc%3D" alt="" height="674" width="1206"><figcaption><p>여섯 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/pQASr/btsNhY2c23w/AAAAAAAAAAAAAAAAAAAAAKy-JPahvvoi5vXW8_4NhHy-O5XQksAInZ8CZ8TNQlmQ/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=dOyQC6zNTmTh3fPrBBUxi9K84bc%3D" alt="" height="668" width="1202"><figcaption><p>일곱 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/b9nHRN/btsNi5k9Wzx/AAAAAAAAAAAAAAAAAAAAABo1cQEOMJrfEdCqLLFVra3hRmBMuuSg1dCRzC8-oYxW/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=jnFJsYxtW2kqlaTqSR0uq5hv9Tk%3D" alt="" height="680" width="1071"><figcaption><p>여덟 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/eoWclE/btsNhPqUqg8/AAAAAAAAAAAAAAAAAAAAAEW0D0gy8Pm8TYokJAt8fK50e_X3_eRg4VFEPouslk2P/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=RJgPlrrE0t8daSiu9kqizpMI2ec%3D" alt="" height="696" width="846"><figcaption><p>아홉 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/bNOUoH/btsNiPpl0D3/AAAAAAAAAAAAAAAAAAAAAJUXhyVexnSRteTmJZvNkB_rmAfcfCTnhDyMxBDwoJtN/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=KrQ6CIlCDQn%2F%2Fw00PgaXvE2kDmE%3D" alt="" height="771" width="707"><figcaption><p>열 번째 디코딩</p></figcaption></figure>

<figure><img src="https://blog.kakaocdn.net/dna/nUboL/btsNh8p09fT/AAAAAAAAAAAAAAAAAAAAAL3J9TGN41S21kYtgfY-BuzXqA35a_QIQ57rl_mKHZiQ/img.png?credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&#x26;expires=1782831599&#x26;allow_ip=&#x26;allow_referer=&#x26;signature=IPeUWNju2QpgU%2BTpqBtH2g2wBjc%3D" alt="" height="737" width="571"><figcaption></figcaption></figure>

플래그를 뱉는다.

<br>


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