# 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.