amateursCTF 2023
i did this ctf solo (all of my team members are busy), and I spent pretty much all my time for the 5 days of the ctf
i managed to solve like 27/66, which i think is pretty good for someone of my calibre
the most guessy ctf of them all
also gitint sucks btw
had to heavily abuse cyberchef and text-format-wizard
| chall name | category | time spent/10 | completion/10 | personal comments |
|---|---|---|---|---|
| cps remastered | web | 7/10 | 10/10 | php sucks so much |
| sanity check | misc | -2147483648/10 | 10/10 | discord |
| survey | misc | 2/10 | 10/10 | too guessy challs |
| waiting-an-eternity | web | 3/10 | 10/10 | 710 septillion years |
| funny factorials | web | 4/10 | 10/10 | recursion ftw |
| Compact XORs | crypto | 3/10 | 10/10 | compact for sure |
| Gitint 5e | osint | 4/10 | 10/10 | ehh |
| You get extra information 1 | crypto | 4/10 | 10/10 | exact same as ictf RSAddition chall i made |
| latek | web | 5/10 | 10/10 | latex rolls off the tongue better |
| rntk | pwn | 6/10 | 10/10 | my second ever pwn chall (first was ret2libc) |
| You get extra information 2 | crypto | 5/10 | 10/10 | z3 op |
| Censorship | misc | 4/10 | 10/10 | mental (pyjail)lness |
| Censorship lite | misc | 5/10 | 10/10 | good |
| Painfully deep flag | forensics | 6/10 | 10/10 | i hate forensics, too guessy for sure |
| ScreenshotGuesser | osint | 6/10 | 10/10 | would be a pain if i didnt know about wigle |
| rusteze | rev | 6/10 | 10/10 | binja op |
| elfcrafting-v1 | pwn | 3/10 | 10/10 | easiest pwn chall ever |
| trick question | rev | 5.5/10 | 10/10 | good chall! |
| Archived | osint | 8/10 | 10/10 | stalked all of the admins social medias, githubs, etc |
| go-gopher | web | 6/10 | 10/10 | you needed to buy a domain for this one (wtf!?) |
| rules-iceberg | forensics | 5/10 | 10/10 | lsb stego is ok |
| Censorship lite++ | misc | 7/10 | 10/10 | fun pyjail |
| gcd-query-v1 | algo | 7/10 | 10/10 | hard |
| gcd-query-v2 | algo | 6/10 | 10/10 | easier than v1 |
| whiteboard | algo | 6.5/10 | 10/10 | z3 op once more |
| flagchecker | rev | 7/10 | 10/10 | best chall by far, scratch very good |
| gophers-revenge | web | 8/10 | 10/10 | url encoding is a real pain |
| volcano | rev | 4/10 | 2/10 (no flag) | no clue how to multiple numbers, still learning |
| gitint 7d | misc | 10/10 | 9/10 (no flag) | worst chall by far |
| hex-converter | pwn | 4/10 | 4/10 (no flag) | no clue what to do |
| zipper | forensics | 3/10 | 2/10 (no flag) | only got the “red herring XD” :( |
| Minceraft | forensics | 8/10 | 7/10 (no flag) | all 3 of my methods failed, but worked for others??? wtf!!! |
| OwO time pad | crypto | 6/10 | 3/10 (no flag) | eyes are weak |
| sanity | web | 6/10 | 2/10 (no flag) | never heard of dom clobbering before |
| legality | misc | 5/10 | 1/10 (no flag) | sent in an email, got no reply ????????? huh ??? |
i ended up placing 7/69 (90%) on high school bracket, and 48/914 (95%) overall, which i think is not bad