# Zeyu's CTF Writeups ## \~# man CTFs In case you don't know what CTFs are, here's a nice definition: > A capture the flag (CTF) contest is a special kind of cybersecurity competition designed to challenge its participants to solve computer security problems and/or capture and defend computer systems. ## \~# groups I play CTFs with [Social Engineering Experts](https://ctftime.org/team/151372) and [Water Paddler](https://ctftime.org/team/155019). Social Engineering Experts is a Singapore-based team founded by a group of friends. We're always looking for active players to join us — check out the recruitment form in our CTFtime profile. {% embed url="" %} ## \~# ls -la 2023 | CTF Name | Type | Position | | ---------------------------------------------------------------------------------------- | -------- | --------------------------------------------- | | [DEF CON CTF 2023 Qualifiers](https://ctf.zeyu2001.com/2023/def-con-ctf-2023-qualifiers) | Jeopardy | [🥇](https://emojipedia.org/1st-place-medal/) | | [hxp CTF 2022](https://ctf.zeyu2001.com/2023/hxp-ctf) | Jeopardy | [🥇](https://emojipedia.org/1st-place-medal/) | | [HackTM CTF Qualifiers](https://ctf.zeyu2001.com/2023/hacktm-ctf-qualifiers) | Jeopardy | 6th | | Insomni'hack Teaser | Jeopardy | 11th | | IrisCTF 2023 | Jeopardy | 1st | | TetCTF 2023 | Jeopardy | 4th | ## \~# ls -la 2022 | CTF Name | Type | Position | | ----------------------------------------------------------------------------------------- | --------------------- | ------------------------------------------------------------------------------------- | | ASIS CTF Finals 2022 | Jeopardy | [🥈](https://emojipedia.org/2nd-place-medal/) | | [niteCTF 2022](https://ctf.zeyu2001.com/2022/nitectf-2022) | Jeopardy | 13th | | [STACK the Flags 2022](https://ctf.zeyu2001.com/2022/stack-the-flags-2022) | Jeopardy | [🥉](https://emojipedia.org/3rd-place-medal/) | | LakeCTF Finals | Jeopardy | 6th | | [LakeCTF Qualifiers](https://ctf.zeyu2001.com/2022/lakectf-qualifiers) | Jeopardy | 7th | | [The InfoSecurity Challenge 2022](https://ctf.zeyu2001.com/2022/tisc-2022) | Jeopardy | Challenge Author | | Midnight Sun CTF Finals | Jeopardy | 7th | | Midnight Sun CTF Quals | Jeopardy | 6th | | [BalsnCTF 2022](https://ctf.zeyu2001.com/2022/balsnctf-2022) | Jeopardy | 8th | | HITB SECCONF CTF 2022 | Attack-Defense | 11th | | [BSidesTLV 2022 CTF](https://ctf.zeyu2001.com/2022/bsidestlv-2022-ctf) | Jeopardy | 7th | | [Grey Cat The Flag 2022 Qualifiers](https://ctf.zeyu2001.com/2022/grey-cat-the-flag-2022) | Jeopardy |

🥉 (SG)
4th (Overall)

| | [DEF CON CTF 2022 Qualifiers](https://ctf.zeyu2001.com/2022/def-con-ctf-2022-qualifiers) | Jeopardy | 26th | | [Securinets CTF Finals 2022](https://ctf.zeyu2001.com/2022/securinets-ctf-finals-2022) | Jeopardy | 4th | | [NahamCon CTF 2022](https://ctf.zeyu2001.com/2022/nahamcon-ctf-2022) | Jeopardy | 13th | | [Securinets CTF Quals 2022](https://ctf.zeyu2001.com/2022/securinets-ctf-quals-2022) | Jeopardy | 4th | | LINE CTF 2022 | Jeopardy | 19th | | [CTF.SG CTF](https://ctf.zeyu2001.com/2022/ctf.sg-ctf) | Jeopardy | [🥉](https://emojipedia.org/3rd-place-medal/) | | [YaCTF 2022](https://ctf.zeyu2001.com/2022/yactf-2022) | Jeopardy (Individual) | 13th | | [DiceCTF 2022](https://ctf.zeyu2001.com/2022/dicectf-2022) | Jeopardy | 33rd | | [TetCTF 2022](https://ctf.zeyu2001.com/2022/tetctf-2022) | Jeopardy | 7th | ## \~# ls -la 2021 | CTF Name | Type | Position | | -------------------------------------------------------------------------------------------------------------------- | --------------------- | ----------------------------------------------------------------------------------------- | | [hxp CTF 2021](https://ctf.zeyu2001.com/2021/hxp-ctf-2021) | Jeopardy | 48th | | [HTX Investigator's Challenge 2021](https://ctf.zeyu2001.com/2021/htx-investigators-challenge-2021) | Jeopardy | Top of Scoreboard | | idekCTF 2021 | Jeopardy | 13th | | [Metasploit Community CTF](https://ctf.zeyu2001.com/2021/metasploit-community-ctf) | Hack Quest | 7th | | [MetaCTF CyberGames](https://ctf.zeyu2001.com/2021/metactf-cybergames) | Jeopardy | 24th | | [CyberSecurityRumble CTF](https://ctf.zeyu2001.com/2021/cybersecurityrumble-ctf) | Jeopardy | 16th | | [The InfoSecurity Challenge (TISC) 2021](https://ctf.zeyu2001.com/2021/the-infosecurity-challenge-tisc-2021) | Jeopardy (Individual) | 23rd | | BuckeyeCTF 2021 | Jeopardy | 7th | | [SPbCTF's Student CTF 2021 Quals](https://ctf.zeyu2001.com/2021/spbctfs-student-ctf-quals) | Jeopardy | 37th | | pbCTF 2021 | Jeopardy | 32nd | | DeconstruCT.F | Jeopardy | 14th | | [Asian Cyber Security Challenge (ACSC) 2021](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021) | Jeopardy (Individual) |

🥉 (SG)

33rd (Overall)

| | [CSAW CTF Qualification Round 2021](https://ctf.zeyu2001.com/2021/csaw-ctf-qualification-round-2021) | Jeopardy | 23rd | | [YauzaCTF 2021](https://ctf.zeyu2001.com/2021/yauzactf-2021) | Jeopardy | 9th | | [InCTF International](https://ctf.zeyu2001.com/2021/inctf-2021) | Jeopardy | 22nd | | DEF CON 29 Red Team Village CTF (Finals) | Hack Quest | 18th | | DEF CON 29 Red Team Village CTF (Quals) | Jeopardy | 16th | | [UIUCTF 2021](https://ctf.zeyu2001.com/2021/uiuctf-2021) | Jeopardy | 18th | | Securebug Loki CTF | Jeopardy | 5th | | [Google CTF 2021](https://ctf.zeyu2001.com/2021/google-ctf-2021) | Jeopardy | < 20% | | [TyphoonCon CTF 2021](https://ctf.zeyu2001.com/2021/typhooncon-ctf-2021) | Jeopardy | 10th | | [DSTA BrainHack CDDC21](https://ctf.zeyu2001.com/2021/dsta-brainhack-cddc21) | Jeopardy | [🥉](https://emojipedia.org/3rd-place-medal/) | | [BCACTF 2.0](https://github.com/zeyu2001/CTFs/blob/master/2021/bcactf-2.0) | Jeopardy | 43rd | | [Zh3ro CTF V2](https://ctf.zeyu2001.com/2021/zh3ro-ctf-v2) | Jeopardy | 37th | | [Pwn2Win CTF](https://ctf.zeyu2001.com/2021/pwn2win-ctf-2021) | Jeopardy | 62nd | | [NorzhCTF](https://ctf.zeyu2001.com/2021/norzhctf-2021) | Hack Quest | 29th | | [DawgCTF](https://ctf.zeyu2001.com/2021/dawgctf-2021) | Jeopardy | 13th | | [UMDCTF](https://ctf.zeyu2001.com/2021/umdctf-2021) | Jeopardy | 8th | | [Midnight Sun CTF](https://ctf.zeyu2001.com/2021/midnight-sun-ctf) | Jeopardy | < 20% | | [picoCTF](https://ctf.zeyu2001.com/2021/picoctf) | Jeopardy | < 5% | | [DSO-NUS CTF](https://ctf.zeyu2001.com/2021/dso-nus-ctf) | Jeopardy | < 20% | ## \~# cat LICENSE All original code is licensed under the MIT license. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ctf.zeyu2001.com/readme.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.