findDDos.py

# coding=UTF-8
import dpkt
import socket
import optparse

def findDownload(pcap):
    for (ts,buf) in pcap:
        try:
            eth = dpkt.ethernet.Ethernet(buf)
            ip = eth.data
            src = socket.inet_ntoa(ip.src)
            tcp = ip.data
            http = dpkt.http.Request(tcp.data)
            if http.method == 'GET':
                uri = http.uri.lower()
                if '.zip' in uri and 'loic' in uri:
                    print('[!]' + src + ' Downloaded LOIC.')
        except:
            pass
THRESH = 10000
def findAttack(pcap):
    pktCount = {}
    for (ts,buf) in pcap:
        try:
            eth = dpkt.ethernet.Ethernet(buf)
            ip = eth.data
            src = socket.inet_ntoa(ip.src)
            dst = socket.inet_ntoa(ip.dst)
            tcp = ip.data
            dport = tcp.dport
            if dport == 80:
                stream = src + ':' + dst
                if pktCount.has_key(stream):
                    pktCount[stream] = pktCount[stream]+1
                else:
                    pktCount[stream] = 1
        except:
            pass
    for stream in pktCount:
        pktsSent = pktCount[stream]
        if pktsSent>THRESH:
            src = stream.split(':')[0]
            dst = stream.split(':')[1]
            print('[+]' + src +' attacked' +dst +' with' + str(pktsSent) + 'pkts.')
def findHivemind(pcap):
    for (ts,buf) in pcap:
        try:
            eth = dpkt.ethernet.Ethernet(buf)
            ip = eth.data
            src = socket.inet_ntoa(ip.src)
            dst = socket.inet_ntoa(ip.dst)
            tcp = ip.data
            dport = tcp.dport
            sport = tcp.sport
            if dport == 6667:
                if '!lazor' in tcp.data.lower():
                    print('[!] DDoS Hivemind issued by:' + src)
                    print('[+] Target CMD:' + tcp.data)
            if sport == 6667:
                if '!lazor' in tcp.data.lower():
                    print('[!] DDoS Hivemind issued by:' + src)
                    print('[+] Target CMD:' + tcp.data)
        except:
            pass

def main():
    parser = optparse.OptionParser("usage%prog -p<pcap file> -t <thresh>")
    parser.add_option('-p',dest='pcapFile',type='string',hlep='specify pcap filename')
    parser.add_option('-t',dest='thresh',type='int',help='specify threshold count')
    (options,args) = parser.parse_args()
    if options.pcapFile ==None:
        print(parser.usage)
        exit(0)
    if options.thresh !=None:
        THRESH = options.thresh
    pcapFile = options.pcapFile
    f = open(pcapFile)
    pcap = dpkt.pcap.Reader(f)
    findDownload(pcap)
    findHivemind(pcap)
    findAttack(pcap)

if __name__ == '__main__':
    main()