Challenge Description

Crack the power of God. To gain authority.

Flag format: CTF{sha256}

Flag Proof

CTF{ee4dd34bd5fde749971cf3face2fab53eef19dd9e3d17deb69fdf3a4d7db3b89}

Summary

Open the binary in IDA and use the password stored there

Details

This challenge was quite easy.

I simply opened up IDA and I started checking out the functions. One of them was checking the input against a certain number:

__int64 __fastcall sub_835(int a1)
{
  printf("Show me the power of gods: 0x%x\\n", 4289920975LL);
  return (a1 % a1) ^ (a1 % 116652) ^ (unsigned int)(a1 % a1 == 0);
}

a1 % a1 will always be equal to 0.

We had to get a final result of 0, so we had to set a1 to 116652.

We connected to the server, added that key, and got the flag: