getPatterns.sh

#!/bin/bash
END=3
>brute-force-patterns.txt

# generate the 81 possible combinations of hashcat brute force pattern for IP address
oneDigit="?d"
twoDigit="?d?d"
treDigit="?d?d?d"

for i in $(seq 1 $END); do
  for j in $(seq 1 $END); do
    for r in $(seq 1 $END); do
      for s in $(seq 1 $END); do
        echo $i $j $r $s
        if [ "$i" -eq "1" ]; then
          address="${oneDigit}"
        elif [ "$i" -eq "2" ]; then
          address="${twoDigit}"
        elif [ "$i" -eq "3" ]; then
          address="${treDigit}"
        fi
        if [ "$j" -eq "1" ]; then
          address="${address}.${oneDigit}"
        elif [ "$j" -eq "2" ]; then
          address="${address}.${twoDigit}"
        elif [ "$j" -eq "3" ]; then
          address="${address}.${treDigit}"
        fi
        if [ "$r" -eq "1" ]; then
          address="${address}.${oneDigit}"
        elif [ "$r" -eq "2" ]; then
          address="${address}.${twoDigit}"
        elif [ "$r" -eq "3" ]; then
          address="${address}.${treDigit}"
        fi
        if [ "$s" -eq "1" ]; then
          address="${address}.${oneDigit}"
        elif [ "$s" -eq "2" ]; then
          address="${address}.${twoDigit}"
        elif [ "$s" -eq "3" ]; then
          address="${address}.${treDigit}"
        fi
        echo $address >>brute-force-patterns.txt
      done
    done
  done
done

echo "Done"