writeup of UMCTF2021(archive) hosted by MOCSCTF

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| categories | challenges | link |
|---|---|---|
| Crypto | BabyRSA | clickme |
| Crypto | caesars_army | clickme |
| Crypto | OptimalPrime | clickme |
| Crypto | WII | clickme |
| Crypto | vigenere | clickme |
| Crypto | Feistel1 | clickme |
| Forensic | Note | clickme |
| Forensic | Request | clickme |
| Forensic | dialTone | clickme |
| Forensic | hide | clickme |
| Forensic | leavingMsg | clickme |
| Forensic | pic the zip | clickme |
| OSINT | ChaoSuiGor-1 | clickme |
| OSINT | ChaoSuiGor-2 | clickme |
| OSINT | ChaoSuiGor-3 | clickme |
| OSINT | ChaoSuiGor-4 | clickme |
| OSINT | magic_swirl | clickme |
| Pwn | babycoffee-1 | clickme |
| Pwn | babycoffee-2 | clickme |
| Pwn | ez_stack@merak | clickme |
| Pwn | int_overflow@merak | clickme |
| Pwn | shellcode@merak | clickme |
| MISC | braintruck | clickme |
| MISC | broken QRcode | clickme |
| MISC | happy_check | clickme |
| MISC | iphonebot | clickme |
| MISC | macow | clickme |
| MISC | break my shield | clickme |
| MISC | MotalkingtoRes | clickme |
| MISC | pain_text | clickme |
| MISC | takeit | clickme |
| MISC | 小透明@merak | clickme |
| MISC | 神秘咒文@merak | clickme |
| Reverse | crackme@merak | clickme |
| Reverse | ez_unpack@merak | clickme |
| Reverse | flagCheck | clickme |
| Reverse | maze@merak | clickme |
| Reverse | obfuscatedJS | clickme |
| Reverse | signIn@merak | clickme |
| Reverse | what-cipher-is-this | clickme |
| Reverse | xiaofang_firware_1_MomoSecret&2_msgforMomoOnly | clickme |
| Reverse | z00m | clickme |
| Web | admin-profile | clickme |
| Web | compair | clickme |
| Web | do_you_speak_PHP | clickme |
| Web | ebook-reader | clickme |
| Web | eval-tutorial | clickme |
| Web | hardhead | clickme |
| Web | infogathering | clickme |
| Web | noobs_click | clickme |
| Web | path2funny | clickme |
| Web | snake-game | clickme |
| Web | talking_tomcat | clickme |
| Web | tin_chuk_car_car | clickme |
| Web | xss | clickme |