cscg24-license

CSCG 2024 Challenge 'Most unique license checker'
git clone https://git.sinitax.com/sinitax/cscg24-license
Log | Files | Refs | sfeed.txt

commit 24c7090631c941e9be5c86755037998a3ab02acf
parent 413e5c55f8ed8ae1b1885eae05062f556050412a
Author: Louis Burda <quent.burda@gmail.com>
Date:   Sat, 13 Apr 2024 18:25:05 +0200

Update notes

Diffstat:
Msolve/notes | 10++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/solve/notes b/solve/notes @@ -16,9 +16,15 @@ to avoid another blowup, we use lazy evaluation. a hacky way to get simulation state output is to use sigalarm and reschedule in the handler. more standard way is logging.getLogger("..").setLevel(logging.DEBUG) - if angr just fails and you know it should be possible - its probably more -advanced crypto that you would not be able to reverse with symbolic execution anyways +advanced crypto that you would not be able to reverse with symbolic execution anyways. +z3 fails silently - love it! the binarydb is fucked, bad signature matching caused the md5 function to look like it was caused address sanitizer compile.. + +for future interest, the binary in the bndb is patched incorrectly! + +always google those constants quickly, before wasting time + +find out its md5, brute with hashcat after removing two candidates.. 5 min on gtx970