Played with Balsn, and get 4th this time.
I have to construct my payload more carefully, wasted too much time on debugging.
This is not a writeup for reading, just a kind of reminder for myself.
Misc::space saver
Solution1
binwalk --dd=".*" space.ddformostwould extract the same png, but missing the most important part !!- The password of rar is concated after the keyword
IENDof each png
Solution2
- mount the dd
mount -o loop space.dd /mnt/tmp - scan for searching deleted files
Misc::can you guess me
intuitive solution
also my solution
print(vars())
error base
this is interesting
help(flag)
intended solution
It’s persuasive, because exec
Misc::Project Eulernt
Factor + random permutation and greedy
This should be more efficiency ？
Factor + dfs
This is the first thought came to my mind, did not find this solution on CTFtime’s wirteup.
But the writeup released by team ranked 2nd and 3rd are this kind.