比赛地址：https://datacon.qianxin.com/ctf/22/stage
题目网盘备份
链接：https://pan.baidu.com/s/1vcJZarQwLqsw0uYRRNuPYg 提取码：xmxm
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ubuntu 20.04, qemu6.1.1
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Just a rust program
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Just a simple program
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赛题描述 nc 120.77.30.1 40999 120.77.65.207 40999 47.107.31.31 40999
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Here is a corrupted PEM file, please help me to recover it! FLAG is HFCTF{sha256 of recovered PEM file}
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What's the shared key?
提示：Search Engine is your best teacher. This is a homemade scheme, so you may not get any useful information after searching with keywords such as "HCDSA" directly. Why not picking other schemes which are used widely in real world as keywords, and you may find what you want.
提示：For the order of curve, you need to read some papers to compute it. For the faults in the signing process, there was a similar bug in a famous cryptocurrency project.
提示：Convert XOR to ADD
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What's Bob's secret key?
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提示：1. 不提供/usr/sbin/do-upgrade文件，固件格式可以从test_patch.fw分析 2. 时间侧信道
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地址： 47.107.31.31:48090 120.77.30.1:48090 120.77.65.207:48090 环境每30分钟重置一次
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It is a pure sql injection challenge. Login any account to get flag. Have fun with mysql 8. There is something useful in /hint.md.
提示：regexp
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关注"DataCon大数据安全分析竞赛"回复"2022虎符签到"即可获得flag
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Just a simple contract nc 47.107.31.31 42000 faucet 47.107.31.31 48080 geth 47.107.31.31 48545 备用IP（端口不变）： 120.77.30.1 120.77.65.207
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play a game! nc 120.77.30.1 48771 nc 120.77.65.207 48771 nc 47.107.31.31 48771
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ZE9CUk8gUE9WQUxPV0FUWCBOQSBNQVReLCBXWSBET0xWTlkgUEVSRVdFU1RJIFxUTyBOQSBBTkdMSUpTS0lKIFFaWUsuIHRXT0ogU0VLUkVUIFNPU1RPSVQgSVogRFdVSCBTTE9XLiB3U0UgQlVLV1kgU1RST15OWUUuIHFCTE9eTllKIEFSQlVaLiB2RUxBRU0gV0FNIE9UTEleTk9HTyBETlEu Flag格式 HFCTF{[a-z_]+}，如有空格使用下划线代替。
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Someone used a cheat code in Contra 2048 and we captured his traffic. Please help me find his cheat code.
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Just a simple sudo program
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I wonna translate my flag, but my brother did some weird thing..
提示：1. Do you believe in gxx's personality? You may wonder where I set the registers.
提示：Hurry up, my code can only check the flag for you in a very limit time. The ciphertext is generated at the same time as the code file.
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I hate loops... But I must admit that they can be very useful sometimes. So could you get them back for me?
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Are you familiar with techniques that malwares usually use?