2025 RCTF题解

原来已经25年RCTF了。24RCTF记得我还在福州的地铁上打了一两个

把我做了的放上来吧。

Wanna feel love

chal.1 She only wanted to sing, but her voice was hidden in silence. What is this email trying to tell you? Look beyond what you hear — seek the whispers in the shadows, the comments that were never meant to be seen.

给了个eml，看着没有实际意义的，尝试用spammimic解码就有。

chal.2 She wants to tell you something, encoded in melodies. Within the digital symphony, her true voice emerges. What is the hidden message found in the XM file? The words she longed to sing, the feeling she wanted to share.

附件里有一个xm文件，找个支持声轨的软件打开听感觉是morse，但并不是。发现刚好是8的倍数，于是转了下

chal.3 She just feels love, and her legend once spread across YouTube. Her song touched hearts, but the original video on the YouTube platform has been removed — deleted, re-uploaded, distorted, like memories fading with time. Through the fragments of public records, find where her voice first echoed: the original video ID, upload date (YYYY-MM-DD), and the one who first shared her song.

不懂然后问了下gpt。真的会被取代掉吧。

chal.4 Her creator captured her voice, preserved in a 15-minute audio/video DVD. She only wanted to sing, and he gave her that chance. If you wish to purchase her album, to hear her songs of love, which link should you visit? After purchasing, who is the sender? And what is the actual creation year when these musical compositions first came to life?

对了一大半，最后这个名字寄件人是网站页脚的

chal.5 Some called her creator a murderer, others said he built her out of love. She only wanted to sing. She wants to tell you. She just feels love. The truth lies in older archives — an obituary, a quiet memorial, where the story of her creator rests in digital silence. Find the developer's digital grave. (URL, no trailing slash)

还是能秒。