Rev/HelloWorld

298 points

taking small Bites of Bytes File

Solution

Not much to comment here...

darkCTF{4rgum3nts_are_v3ry_1mp0rt4nt!!!}

Rev/so_much

207 points

strcmp printf File

Solution

I've used ghidra to have a look into the decompiled code.

After quick examination I've came to conclusion that the code base on strcmp function. I've decided to override this function with my own implementation.

Prepared below code:

#define _GNU_SOURCE

int strcmp ( char * str1, char * str2 )
{
return 0;
}

int main()
{
return 0;
}

Compiled it and executed the program with LD_PRELOAD.

gcc -ldl -fpic -nostartfiles -shared mystrcmp.c -o mystrcmp.so
sudo LD_PRELOAD=./mystrcmp.so ./so_much anything

darkCTF{w0w_s0_m4ny_funct10ns}

Misc/Minetest 1

303 points

``` Just a sanity check to see whether you installed Minetest successfully and got into the game

Challenge ```

Solution

Just install the game and import the given world. Once started we've got some logical gates. If you make circuit to have true on the output flag will show up.

DarkCTF{y0u_5ucess_fu11y_1ns7alled_m1n37e57}