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#!/bin/env python
# autoscan - automatic fingerprint of visited networks
# 2013, Laurent Ghigonis <laurent@gouloum.fr>
# Usage: autoscan.py [-d] [interfaces]
# by default, monitor all network interfaces
# Should work on all Linux versions
# Each time network connectivity become available after a cut-off,
# run some tests and store results in
# YYYYMMDD_hhmmss_interface/testname/output"
# * ifconfig
# * if WIFI, iwconfig
# * /etc/resolv.conf
# * 15s pcap
# * route -n
# * traceroute
# * local net IP scan
# * public IP (curl ifconfig.me)
# * ping 8.8.8.8
import sys
import os
import time
import subprocess
import traceback
import re
import argparse
import shutil
import errno
class Autoscan_iface(object):
def __init__(self, iface, logpath=".", pubip="8.8.8.8", verbose=0):
self.iface = iface
self.logpath = logpath
self.verbose = verbose
self.pubip = pubip
self.date = None # set by _do_tests()
if 'SUDO_UID' in os.environ and 'SUDO_GID' in os.environ:
self.perm_uid = int(os.environ['SUDO_UID'])
self.perm_gid = int(os.environ['SUDO_GID'])
else:
self.perm_uid = os.getuid()
self.perm_gid = os.getgid()
self.found_ip4 = None
self.found_ip6 = None
self.found_pubip = None
self.found_dns = list()
def monitor(self):
self._do_tests()
while True:
self._wait_down()
self._wait_up()
self._do_tests()
def run_now(self):
self._do_tests()
def _wait_up(self):
while True:
out, err, code = self._exec(
['ifconfig', self.iface])
up = re.search(r'UP', out)
ip4 = re.search(r'inet (\S+)', out)
ip6 = re.search(r'inet6 (\S+)', out)
if up and (ip4 or ip6):
break
time.sleep(1)
def _wait_down(self):
while True:
out, err, code = self._exec(
['ifconfig', self.iface])
up = re.search(r'UP', out)
if not up:
break
# XXX also consider sleep as interface down
time.sleep(1)
def _do_tests(self):
self.date = time.strftime("%Y%m%d_%H%M%S", time.gmtime())
self._do_tests_run(self._test_pcap)
self._do_tests_run(self._test_ifconfig)
self._do_tests_run(self._test_iwconfig)
self._do_tests_run(self._test_route)
self._do_tests_run(self._test_resolv)
self._do_tests_run(self._test_pubip_get)
self._do_tests_run(self._test_pubip_ping)
self._do_tests_run(self._test_pubip_traceroute)
self._do_tests_run(self._test_resolv_traceroute)
self._do_tests_run(self._test_explor_traceroute)
self._do_tests_run(self._test_explor_scan)
if self.found_pubip:
suffix = self.found_pubip
else:
suffix = self.found_ip4
newpath = self._storepath_get() + "_" + suffix
if self.verbose >= 1:
print "[*] %s" % newpath
os.rename(self._storepath_get(), newpath)
def _do_tests_run(self, func):
try:
if self.verbose >= 1:
print "[-] %s" % func.__name__
func()
except Exception, e:
print("test %s failed: %s" % (func, e))
traceback.print_exc()
def _test_pcap(self):
if os.fork() != 0:
return
# child
os.system("$(tcpdump -ni %s -w %s 2>/dev/null & sleep 15; kill %%1) &" % (
self.iface, self._storepath_get("pcap/tcpdump.pcap")))
sys.exit(0)
def _test_ifconfig(self):
out, err, code = self._exec(
['ifconfig', self.iface])
self._store("ifconfig/out", out)
up = re.search(r'UP', out)
if up: self._store("ifconfig/up", "")
ip4 = re.search(r'inet (\S+)', out)
if ip4:
self._store("ifconfig/ip4", ip4.group(1))
self.found_ip4 = ip4.group(1)
ip6 = re.search(r'inet6 (\S+)', out)
if ip6:
self._store("ifconfig/ip6", ip6.group(1))
self.found_ip6 = ip6.group(1)
def _test_iwconfig(self):
out, err, code = self._exec(
['iwconfig', self.iface])
if len(out) == 0:
return # not a WIFI interface
self._store("iwconfig/out", out)
essid = re.search(r'ESSID:(\S+)', out)
if essid: self._store("iwconfig/essid", essid.group(1))
ap = re.search(r'Access Point: (\S+)', out)
if ap: self._store("iwconfig/ap", ap.group(1))
def _test_route(self):
out, err, code = self._exec(
['route', '-n'])
self._store("route/out", out)
gw = re.findall(r'(\S+)', out.split('\n')[2])[1]
if gw: self._store("route/gw", gw)
def _test_resolv(self):
shutil.copy("/etc/resolv.conf", self._storepath_get("resolv/resolv.conf"))
n = 0
with open("/etc/resolv.conf") as f:
for line in f:
r = re.search('nameserver (\S+)', line)
if r:
dns = r.group(1)
self._store("resolv/dns%d" % n, dns)
self.found_dns.append(dns)
n += 1
def _test_pubip_get(self):
out, err, code = self._exec(
['curl', '--retry', '3', 'ifconfig.me'])
self._store("pubip_get/ip", out)
self.found_pubip = out.strip()
def _test_pubip_ping(self):
out, err, code = self._exec(
['ping', '-W', '3', '-c', '1', self.pubip])
self._store("pubip_ping/code", code)
self._store("pubip_ping/out", out)
def _test_resolv_traceroute(self):
for dns in self.found_dns:
self._store("resolv_traceroute/out",
self._util_traceroute(dns))
def _test_pubip_traceroute(self):
self._store("pubip_traceroute/out",
self._util_traceroute(self.pubip))
def _test_explor_traceroute(self):
targets = ["192.168.0.1", "192.168.1.1", "192.168.2.1", "10.0.0.1", "172.16.0.1"]
for t in targets:
self._store("explor_traceroute/out_%s" % t,
self._util_traceroute(t))
def _util_traceroute(self, target):
out, err, code = self._exec(
['traceroute', target])
return out
def _test_explor_scan(self):
target = re.sub('\.[0-9]+$', '', self.found_ip4) + "/24" # XXX v6
out, err, code = self._exec(
['nmap', '-oA', self._storepath_get("explor_scan/localnet"), '-p', '21,22,23,445,80,443,8080,8081,8082,8083', target])
self._store("explor_scan/out", out)
if len(err) > 0:
self._store("explor_scan/err", err)
def _exec(self, cmd):
p = subprocess.Popen(cmd,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = p.communicate()
return out, err, p.returncode
def _store(self, suffix, txt):
name = self._storepath_get(suffix)
if self.verbose >= 2:
print("%s = %s" % (name, txt))
f = open(name, "w+")
f.write(str(txt))
f.close()
os.chown(name, self.perm_uid, self.perm_gid)
def _storepath_get(self, suffix=None):
path = "%s/%s_%s" % (self.logpath, self.date, self.iface)
if suffix:
path += "/" + suffix
d = os.path.dirname(path)
if not os.path.isdir(d):
os.makedirs(d)
subprocess.check_output(['chown', '-R', '%s:%s' % (self.perm_uid, self.perm_gid), self.logpath]) # pythonic way is awefull
return path
if not os.geteuid() == 0:
sys.exit('must be root')
# XXX all ifaces by default, use netifaces
parser = argparse.ArgumentParser()
parser.add_argument("interfaces", nargs='+',
help="Interface(s) to use")
parser.add_argument("-m", "--monitor", action="store_true",
help="Mode monitor: Stay in the background and automaticaly run when interface turns up")
parser.add_argument("-r", "--runnow", action="store_true",
help="Mode runnow (default): Run tests/scans now and exit")
parser.add_argument("-f", "--foreground", action="store_true",
help="Run in foreground for monitor mode, do not daemonize")
parser.add_argument("-o", "--outdir", action="store", default=".",
help="Use DIR as output directory")
parser.add_argument("-p", "--pubip", action="store", default="8.8.8.8",
help="Use target IP for public IP tests")
parser.add_argument("-v", "--verbose", action="store_true",
help="Increase output verbosity, default=0, max=2")
args = parser.parse_args()
if args.runnow and args.monitor:
print "Cannot specify both monitor and runnow modes !"
sys.exit(1)
if args.runnow and args.foreground:
print "Cannot specify foreground with runnow, it's implicit !"
sys.exit(1)
if not args.runnow and not args.monitor:
args.runnow = True
args.foreground = True
for iface in args.interfaces:
if os.fork() == 0:
autoscan = Autoscan_iface(iface, args.outdir, args.pubip,
args.verbose)
if args.runnow:
autoscan.run_now()
else:
autoscan.monitor()
# UNREACHED
if args.foreground:
# wait for all iface forks and subchilds
while True:
try: os.wait()
except: break
|
