105 lines
3.2 KiB
Ruby
105 lines
3.2 KiB
Ruby
# $Id$
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#
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# Maps remote disks and logical volumes to a local Network Block Device
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# server. Allows for forensic tools to be executed on the remote disk
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# directly.
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#
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# R. Wesley McGrew wesley@mcgrewsecurity.com
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# http://mcgrewsecurity.com
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# Mississippi State University National Forensics Training Center
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# http://msu-nftc.org
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class Metasploit3 < Msf::Post
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def initialize(info={})
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super( update_info( info,
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'Name' => 'Local NBD Server for Remote Disks',
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'Description' => %q{Maps remote disks and logical volumes to a local Network Block
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Device server. Allows for forensic tools to be executed on the remote disk directly.},
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'Platform' => ['windows'],
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'SessionTypes' => ['meterpreter'],
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'Author' => ['Wesley McGrew <wesley[at]mcgrewsecurity.com>']
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))
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register_options(
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[
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OptString.new('DEVICE',[true,'Device to map (use enum_drives for possible names)',nil]),
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OptString.new('NBDIP',[false,'IP address for NBD server','0.0.0.0']),
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OptInt.new('NBDPORT',[false,'TCP port for NBD server',10005]),
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], self.class)
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end
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def run
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ip_addr = datastore['NBDIP']
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port = datastore['NBDPORT']
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devname = datastore['DEVICE']
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invalid_handle_value = 0xFFFFFFFF
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invalid_set_file_pointer = 0xFFFFFFFF
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fsctl_allow_extended_dasd_io = 0x00090083
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ioctl_disk_get_drive_geometry_ex = 0x000700A0
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r = client.railgun.kernel32.CreateFileA(devname, "GENERIC_READ",
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0x3, nil, "OPEN_EXISTING", "FILE_ATTRIBUTE_READONLY", 0)
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handle = r['return']
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r = client.railgun.kernel32.DeviceIoControl(handle,fsctl_allow_extended_dasd_io,nil,0,0,0,4,nil)
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ioctl = client.railgun.kernel32.DeviceIoControl(handle,ioctl_disk_get_drive_geometry_ex,
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"",0,200,200,4,"")
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if ioctl['GetLastError'] == 6
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ioctl = client.railgun.kernel32.DeviceIoControl(handle,ioctl_disk_get_drive_geometry_ex,
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"",0,200,200,4,"")
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end
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geometry = ioctl['lpOutBuffer']
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disk_size = geometry[24,31].unpack('Q')[0]
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socket = Rex::Socket::TcpServer.create({'LocalHost'=>ip_addr,'LocalPort'=>port})
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print_status("Listening on #{ip_addr}:#{port}")
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print_status("Serving #{devname} (#{disk_size} bytes)")
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rsock = socket.accept()
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print_status("Accepted a connection")
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# Negotiation
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rsock.put('NBDMAGIC')
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rsock.put("\x00\x00\x42\x02\x81\x86\x12\x53")
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rsock.put([disk_size].pack("Q").reverse)
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rsock.put("\x00\x00\x00\x03") # Read-only
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rsock.put("\x00"*124)
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print_line("Sent negotiation")
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while true
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request = rsock.read(28)
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magic, request, nbd_handle, offset_n, length = request.unpack("NNa8a8N")
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if magic != 0x25609513
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print_error("Wrong magic number")
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break
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end
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if request == 2
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break
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end
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if request == 1
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print_error("Attempted write on a read-only nbd")
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break
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end
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if request == 0
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client.railgun.kernel32.SetFilePointer(handle,offset_n[4,7].unpack('N')[0],
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offset_n[0,4].unpack('N')[0],0)
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rsock.put("gDf\x98\x00\x00\x00\x00")
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rsock.put(nbd_handle)
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data = client.railgun.kernel32.ReadFile(handle,length,length,4,nil)['lpBuffer']
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rsock.put(data)
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end
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end
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print_status("Closing")
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rsock.close()
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socket.close()
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client.railgun.kernel32.CloseHandle(handle)
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end
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end
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