This PantesterLabs Recon-10 automatically will brute force and find read color in logo.png file if finds it download the red logo.png file for the easy reference.

Step 1:

python -c "for i in range(0, 256) : print('http://'+hex(i)+'.a.hackycorp.com/logo.png')" > urls.txt

Step 2:

pip3 install numpy==1.21.2 && pip3 install opencv-python-headless==4.5.3.56 && pip3 install requests==2.26.0 && pip3 install Pillow==8.2.0

Step 3:

python3 Recon10.py