比赛地址：UMDCTF 2025 比赛时间：26 Apr 2025 06:00 CST - 28 Apr 2025 06:00 CST Misc find the seeds Challenge can u help Alice find her seeds in the bin? She’s pretty sure the bin hasn’t been dumped since it was generated. 123456789101112import randomimport timeseed = int(time.time())random.seed(seed)plaintext = b"UMDCTF{REDACTED}"keystream = bytes([random.getrandbits(8) for _ in range(len(plaintext))])ciphertext = bytes([p ^ k for p, k in zip(plaintext, keystream)])with open("secret.bin", "wb") as f: ...

比赛地址：DawgCTF 2025 比赛时间：19 Apr 2025 00:00 CST - 21 Apr 2025 00:00 CST 复现的题目用🔁标注 Misc Don’t Touch My Fone Challenge Looks like someone’s dialing a phone number, see if you can figure out what it is! The flag format is the decoded phone number wrapped in DawgCTF{} with no formatting, so if the number is 123-456-7890, then the flag is DawgCTF{1234567890}. Download Challenge File(s): [Click Here](https://github.com/UMBCCyberDawgs/dawgctf-sp25/tree/main/Don’t Touch My Fone) Solution 说了是拨号音了，那就用 D ...

比赛地址：b01lers CTF 2025 比赛时间：19 Apr 2025 07:00 CST - 21 Apr 2025 07:00 CST 复现的题目用🔁标注 Web when Challenge web/whenbeginner author: tillvit the sunk cost fallacy https://when.atreides.b01lersc.tf/ app.ts 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253import express from 'express'import { rateLimit } from 'express-rate-limit'import path from "path"const limiter = rateLimit({ windowMs: 60 * 1000, limit: 60, // 60 per minute standardHeaders: 'draft- ...

比赛地址：UMassCTF 2025 比赛时间：19 Apr 2025 02:00 CST - 21 Apr 2025 08:00 CST 复现的题目用🔁标注 Forensics No Updates Challenge No Updates I don’t believe in updating my computer, it just takes so long! Besides, no one could ever hack me, I use good passwords! Files: chall.pcapng Solution wireshark 打开直接搜 1UMASS{n07_ag41n_d4mn_y0u_m3t4spl017} Macrotrace Challenge Macrotrace A suspicious spreadsheet surfaced from the archive of a defunct Flash game studio. Opening it does… something, but whatever was ther ...

比赛地址：Midnight Flag CTF 比赛时间：12 Apr 2025 16:00 CST - 14 Apr 2025 02:00 CST 复现的题目用🔁标注 Misc HALL OF FLAGS 1/2 Challenge HALL OF FLAGS 1/2 Signal lost… Attempting data restoration… A corrupted memory fragment has resurfaced on the MIDNIGHT underground network. Battle traces, remnants of a forgotten team… An anomaly lingers within the archives of an old trainer. The Hall of Fame records every victory, yet the very first entry seems to have been erased. Who were the true champions? What secrets li ...

比赛地址：TGCTF2025 比赛时间：12 Apr 2025 09:00 CST - 13 Apr 2025 21:00 CST 复现的题目用🔁标注 Misc where it is(osint) Challenge 小明骑着机车在路上驰骋的时候给我拍了一张照片，说找得到他在哪里就请我吃海鲜，你能把他揪出来吗？（flag 形式为 TGCTF {右上角轨道到站的站名}） 解题思路 截取图片的关键部分识图 在谷歌地图搜索对应位置 1TGCTF{港墘站} next is the end Challenge 没有人知道那一天 J1nghong 被看到了什么东西，人们只知道从那以后再也没有人能手动的点开看到他任何一个文件夹里的宝藏（请提交形式为 flag {} 的最终答案） Solution 文件夹套娃，用 VSCode 打开这个文件夹直接秒了 1flag{so_great!} 你的运气是好是坏？ Challenge 好運來 祝你好運來 好運帶來了喜和愛 好運來 我們好運來 迎著好運興旺發達通四海 疊個千紙鶴 再系個紅飄帶 願善良的人們天天好運來 你勤勞生活美 你健康 ...

比赛地址：squ1rrel CTF 2025 比赛时间：5 Apr 2025 7:00 CST - 7 Apr 2025 1:00 CST 复现的题目用🔁标注 Misc 🔁Pretty Please 🥺 Challenge misc/Pretty Please 🥺 author: lemonlad This friendly little fellow is guarding the flag! Employ your wits and wiles to convince him to give it to you. https://squ1rrrel-pretty-please.vercel.app/ Solution 打开开发者工具抓包发现我们向服务器发送了所有的历史消息 1234567891011121314151617181920212223242526272829303132333435363738{ "id": "Xhq4aoa167sAQu7r", "messages": [ { "role": "use ...

比赛地址：阴间 CTF 2025 比赛时间：4 Apr 2025 14:44 CST - 6 Apr 2025 14:44 CST Misc 阴曹地府税务总局 Challenge 近年来，阴曹地府面临财政赤字，阎王爷特批成立了 "阴曹地府税务总局"，专门对阳间烧给亡灵的冥币收税。然而，由于地府税务系统采用了一套基于 Python 随机数的税率波动算法，导致税率每时每刻都在变化，甚至有时会出现 "零税率" 的情况。 作为一名资深会计师，你在阳寿未尽时不慎掉入阴曹地府。为了回到阳间，你需要向地府税务总局贿赂足够的冥币，获取一张特殊通行证。但你需要预测税率波动，在低税率或零税率时交易，才能最大化你的有限资产。 hint: python Solution “基于 Python 随机数的税率波动算法” 那多半就是 random 库了 “每时每刻都在变化” 说明随机数的种子是时间戳 手动玩一遍发现服务器会在一开始就先给出 10 个税率，那么我就可以枚举近期的时间戳，然后通过对比找到正确的时间戳，进而推测出未来的税率，代码如下 12345678910111213141516171819202 ...

比赛地址：Capture Point 5353 3.0 比赛时间：31 Mar 2025 02:00 CST - 1 Apr 2025 16:10 CST 复现的题目用🔁标注 Misc Easy - Peasy Challenge Easy - Peasy Yet another beginner friendly problem designed to motivate you all. 🙂 The flag format for this problem is ctf{LOreM_IpsUM}. #we care for you #happy hacking motivate.pdf Solution 打开附件全选，发现这里有一行空白的文字，点击后发现是一个跳转到 let_us_learn_about_flutter.txt - Google 云端硬盘的链接 直接搜索就找到了 1ctf{now_you_see_me} Phantom Flag Challenge Phantom Flag Not all secrets are burried in dark ! ...