/usr/lib/python2.7/dist-packages/rekall/plugins/windows/netscan.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2013 Google Inc. All Rights Reserved.
#
# Authors:
# Michael Hale Ligh <michael.hale@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# pylint: disable=protected-access
from rekall.plugins.windows import common
from rekall.plugins.overlays.windows import tcpip_vtypes
# Python's socket.AF_INET6 is 0x1e but Microsoft defines it
# as a constant value of 0x17 in their source code. Thus we
# need Microsoft's since that's what is found in memory.
AF_INET = 2
AF_INET6 = 0x17
class PoolScanUdpEndpoint(common.PoolScanner):
"""PoolScanner for Udp Endpoints"""
def __init__(self, **kwargs):
super(PoolScanUdpEndpoint, self).__init__(**kwargs)
min_size = self.profile.get_obj_size("_UDP_ENDPOINT")
if not min_size:
raise RuntimeError(repr(min_size))
self.checks = [
('PoolTagCheck', dict(
tag=self.profile.get_constant("UDP_END_POINT_POOLTAG"))),
('CheckPoolSize', dict(min_size=min_size)),
('CheckPoolType', dict(non_paged=True, free=True, paged=True)),
('CheckPoolIndex', dict(value=0)),
]
class PoolScanTcpListener(common.PoolScanner):
"""PoolScanner for Tcp Listeners"""
def __init__(self, **kwargs):
super(PoolScanTcpListener, self).__init__(**kwargs)
min_size = self.profile.get_obj_size("_TCP_LISTENER")
if not min_size:
raise RuntimeError(repr(min_size))
self.checks = [
('PoolTagCheck', dict(
tag=self.profile.get_constant("TCP_LISTENER_POOLTAG"))),
('CheckPoolSize', dict(min_size=min_size)),
('CheckPoolType', dict(non_paged=True, free=True, paged=True)),
('CheckPoolIndex', dict(value=0)),
]
class PoolScanTcpEndpoint(common.PoolScanner):
"""PoolScanner for TCP Endpoints"""
def __init__(self, **kwargs):
super(PoolScanTcpEndpoint, self).__init__(**kwargs)
min_size = self.profile.get_obj_size("_TCP_ENDPOINT")
if not min_size:
raise RuntimeError(repr(min_size))
self.checks = [
('PoolTagCheck', dict(
tag=self.profile.get_constant("TCP_END_POINT_POOLTAG"))),
('CheckPoolSize', dict(min_size=min_size)),
('CheckPoolType', dict(non_paged=True, free=True, paged=True)),
('CheckPoolIndex', dict(value=0)),
]
class WinNetscan(tcpip_vtypes.TcpipPluginMixin,
common.PoolScannerPlugin):
"""Scan a Vista, 2008 or Windows 7 image for connections and sockets"""
__name = "netscan"
table_header = [
dict(name="offset", style="address"),
dict(name="protocol", width=8),
dict(name="local_addr", width=20),
dict(name="remote_addr", width=30),
dict(name="state", width=16),
dict(name="pid", width=5, align="r"),
dict(name="owner", width=14),
dict(name="created")
]
scanner_defaults = dict(
scan_kernel_nonpaged_pool=True
)
@classmethod
def is_active(cls, session):
# This plugin works with the _TCP_ENDPOINT interfaces. This interface
# uses the new HashTable entry in ntoskernl.exe.
return (super(WinNetscan, cls).is_active(session) and
session.profile.get_constant('RtlEnumerateEntryHashTable'))
def generate_hits(self, run):
scanner = PoolScanTcpListener(
profile=self.tcpip_profile, session=self.session,
address_space=run.address_space)
for pool_obj in scanner.scan(run.start, run.length):
pool_header_end = pool_obj.obj_offset + pool_obj.obj_size
tcpentry = self.tcpip_profile._TCP_LISTENER(
vm=run.address_space, offset=pool_header_end)
# Only accept IPv4 or IPv6
af_inet = tcpentry.InetAF.dereference(vm=self.kernel_address_space)
if af_inet.AddressFamily not in (AF_INET, AF_INET6):
continue
# For TcpL, the state is always listening and the remote port is
# zero
for ver, laddr, raddr in tcpentry.dual_stack_sockets(
vm=self.kernel_address_space):
yield (tcpentry, "TCP" + ver, laddr,
tcpentry.Port, raddr, 0, "LISTENING")
# Scan for TCP endpoints also known as connections
scanner = PoolScanTcpEndpoint(
profile=self.tcpip_profile, session=self.session,
address_space=run.address_space)
for pool_obj in scanner.scan(run.start, run.length):
pool_header_end = pool_obj.obj_offset + pool_obj.obj_size
tcpentry = self.tcpip_profile._TCP_ENDPOINT(
vm=run.address_space, offset=pool_header_end)
af_inet = tcpentry.InetAF.dereference(vm=self.kernel_address_space)
if af_inet.AddressFamily == AF_INET:
proto = "TCPv4"
elif af_inet.AddressFamily == AF_INET6:
proto = "TCPv6"
else:
continue
# Switch profiles to the kernel profile.
owner = tcpentry.Owner.dereference_as(
vm=self.kernel_address_space, profile=self.session.profile)
# Switch to the kernel's address space.
local_addr = tcpentry.LocalAddress(vm=self.kernel_address_space)
remote_addr = tcpentry.RemoteAddress(vm=self.kernel_address_space)
# These are our sanity checks
if tcpentry.State.v() not in tcpip_vtypes.TCP_STATE_ENUM:
continue
if not owner and not local_addr:
continue
yield (tcpentry, proto, local_addr, tcpentry.LocalPort,
remote_addr, tcpentry.RemotePort, tcpentry.State)
# Scan for UDP endpoints
scanner = PoolScanUdpEndpoint(
profile=self.tcpip_profile, session=self.session,
address_space=run.address_space)
for pool_obj in scanner.scan(run.start, run.length):
pool_header_end = pool_obj.obj_offset + pool_obj.obj_size
udpentry = self.tcpip_profile._UDP_ENDPOINT(
vm=run.address_space, offset=pool_header_end)
af_inet = udpentry.InetAF.dereference(vm=self.kernel_address_space)
# Only accept IPv4 or IPv6
if af_inet.AddressFamily not in (AF_INET, AF_INET6):
continue
# For UdpA, the state is always blank and the remote end is
# asterisks
for ver, laddr, _ in udpentry.dual_stack_sockets(
vm=self.kernel_address_space):
yield (udpentry, "UDP" + ver, laddr, udpentry.Port,
"*", "*", "")
def collect(self):
for run in self.generate_memory_ranges():
for (net_object, proto, laddr, lport, raddr, rport,
state) in self.generate_hits(run):
lendpoint = "{0}:{1}".format(laddr, lport)
rendpoint = "{0}:{1}".format(raddr, rport)
owner = net_object.Owner.dereference_as(
vm=self.kernel_address_space, profile=self.session.profile)
yield (net_object.obj_offset, proto, lendpoint,
rendpoint, state,
owner.UniqueProcessId,
owner.ImageFileName,
net_object.CreateTime)
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