Last night, i and my friend played b01lers CTF and got a 1st in VietNam :V, i solved some rev in this ctf. After i finish the most tasks, i think this ctf is for beginner but some tasks i think it so fun, now let’s start !!!
Solved:
Link Battle
Mega Race
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Welcome To Game Over
Goat
Link Battle
This file is an ELF library, so you cannot run it, load in IDA, we have:
if a1 != 6666 is the password to get flag, you can write a script to print result, the best way to solve it is use ctypes to call getflag function, here’s my solution :v
and……. :v :v :v
Goat
This’s a small Java crackme :v, in this challenge there’s 4 part of 4 loops in Crackme function, so in functions, you have to watch and ask your self: which loop need to be reversed ?, then in 4th loop, this is a random-seed + xor encryption, you can use java in their chall to calc the seed :V, here’s my solution example:
after you found the seeds, let’s go to the finish :v :v :v
Capture The Flag 