abuse.sh

#This script scans a log for failed attempts then gets the ip address of the person failing
#at logging in. After that it attempts to get the abuse contact for the network the ip
# address is from. If found it sends a email with the relevant log file information to the
# admin and also the abuse contact for that network.

# Jackie Craig Sparks [email protected] - feel free to contact me anytime thru
# Email or gtalk!
# Visit my websites!! and like them on facebook brothers!
# http://www.phonesnake.com http://www.communicationslibrary.info


securelog="/var/log/secure"
offenders=`cat ${securelog} | grep "Failed password for " | awk '{ print $11 }' | grep -v '[^0-9]\{3\}.[^0-9]\{1,3\}.[^0-9]\{1,3\}.[^0-9]\{1,3\}' |uniq -d | grep '[^a-zA-Z\-\+0-9]\{1,20\}' | uniq -d`

emails="[email protected]"
logdir="/var/log/"
log="bruteforceip"
found=0
for i in $offenders; do
        while read line;do
                if [ "$line" = "$i" ]; then
                        found=1
                        break;
                else
                        found=0
                fi
        done < "${logdir}${log}"

        if [ "$found" == "0" ];then
                echo $i >> ${logdir}${log}
                logentries=`grep ${i} secure`
                contactinfo=`whois_psad $i`
                abuseemail=`whois_psad ${i} | grep 'abuse' | grep -o -E '([[:alnum:]+\.\_\-])+@([[:alnum:]+\.\_\-])+'`
                #echo $abuseemail;
                subject="SSH BRUTE FORCE ${i}"
                echo "ip: ${i} ${contactinfo} ${logentries}" > tmp
                if [ -z "$abuseemail" ]; then
                        for a in $abuseemail;do #email us
                                echo "$abuseemail" >> tmp

                        mail $a -s "${subject}" < tmp
                        done
                        subject="${subject} EMAIL sent to abuse at host"
                fi

                for a in $emails;do #email us
                        mail $a -s "${subject}" < tmp
                #       echo "Sending mail"
                done
        fi
        found=0
done