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Oct 14 / Greg

Rogue Access Point Detection/Mitigation

This is the article relating to my 2011 MUM presentation.

I was trying to think of something fun and different for this year’s MUM, so I came up with rogue access point detection/mitigation. The project surrounds having a Mikrotik probe connect to any open access points it can find. It then trys to access a resource that exists only inside your LAN. In this case the resource is a special web page. It then alerts you and allows you to track them down. Watch the video below for the full presentation: This is an iframe from the tiktube page.

Config Files

ignore-list.txt

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#MAC address~SSID
#00:12:17:DA:09:2G~linksys

This file lists the MAC address followed by the ~ symbol and finally the SSID.
This holds any APs that should be ignored from processing.

probes.txt

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#192.168.88.1~user1~user1

This file holds the connection information for our Mikrotik probes we will be testing with.
IP address of probe, then ~, then username, then ~ and finally password.

settings.txt

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#duraction to run the scan for in seconds
15
#IP of server to pull the rogue page from
192.168.1.2
#path to the rogue file /index.html
/rogue.html
#email address to send alerts to.  Some smtp servers require <> around email addresses.
MyEmail@Address.com
#IP of mail server to relay through
127.0.0.1
#port of smtp server
25

This file holds the general settings for the program.
Duration is how long the probe will scan for open APs.
“IP of server to pull” is the IP address of the “internal only” web server we will be trying to get the HML page from.
“path” will be the full http path to append to the IP address listed above.
MyEmail@Address.com should be replaced by your email address.
Relay server IP should be that of your mail relay.
Port is the SMTP port to use.

Binary

Here’s the download of the compiled exe, source, and config files: MTKRogue.zip (1053)

Source

Current Source code:

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#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_UseX64=n
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#cs ----------------------------------------------------------------------------
 
 AutoIt Version: 3.3.6.1
 Author:         Greg Sowell
 
 Script Function:
	This script controls putty to connect to mikrotik APs and check for rogues on your network.
 
#ce ----------------------------------------------------------------------------
 
; Script Start - Add your code below here
;autioit includes
#include <file.au3>
#include <Array.au3>
 
;open the settings file
Dim $aSettings
If Not _FileReadToArray(@ScriptDir & "\settings.txt",$aSettings) Then
   MsgBox(4096,"Error", " Error reading log to Array     error:" & @error)
   Exit
EndIf
 
;set variables
$Duration = $aSettings[2];duration to do the scan
$serverIP = $aSettings[4];ip address of the webserver
$serverPathFile = $aSettings[6] & """";path to check file
$EmailAddress = $aSettings[8];email address variable
$szIPADDRESS = $aSettings[10];;email server IP address
$nPORT = $aSettings[12];25 ;email server port
$ClipContents = "" ;setup clipboard variable
$waiting = 0 ;variable for time checking
$HostIP = ""
$userN = ""
$passW = ""
$ssid = ""
$mac = ""
$puttyPID = ""
;#cs ----------------------------------------------------------------------------
 
;open hosts file
Dim $aHosts
If Not _FileReadToArray(@ScriptDir & "\probes.txt",$aHosts) Then
   MsgBox(4096,"Error", " Error reading log to Array     error:" & @error)
   Exit
EndIf
 
;main program loop.  Loop through each host.
for $h = 1 to $aHosts[0]
	if StringInStr("---" & $aHosts[$h],"#") < 1 Then
		;not a comment, lets go!!!
		;run the host processing function
		_RunHost()
	EndIf
Next
 
;host processing function
Func _RunHost()
$HostIP = StringLeft($aHosts[$h],StringInStr($aHosts[$h],"~") - 1);pull host IP
$userN = StringMid($aHosts[$h],StringInStr($aHosts[$h],"~") + 1,StringInStr($aHosts[$h],"~",0,2) - StringInStr($aHosts[$h],"~") - 1);Host username
$passW =StringMid($aHosts[$h],StringInStr($aHosts[$h],"~",0,2) + 1);host password
$puttyPID = run(@ScriptDir & "\putty.exe -ssh -l " & $userN & " -pw " & $passW & " " & $HostIP);open putty
 
;do a check cycle of 10 seconds for putty to start
while $waiting <> 10
	If ProcessExists("putty.exe") Then
		$waiting = 100
		ExitLoop
	EndIf
	sleep(1000)
WEnd
 
;check if putty process was found
if $waiting = 10 Then
	MsgBox(0,"putty didn't run", "Sorry, but putty didn't open")
	Exit
EndIf
 
_SleepTime(5,"putty");wait 5 seconds for putty to connect and settle
 
;activate putty
WinActivate($HostIP & " - PuTTY")
WinWaitActive($HostIP & " - PuTTY")
 
;send the command to start the scan
Send("/int wire scan wlan1 duration=" & $Duration & @CRLF)
 
_SleepTime($Duration + 2,"scan command") ;sleep for 2 seconds longer than duration
 
_CopyAll() ;copy everything to clipboard
 
;delete the existing temp file
FileDelete(@ScriptDir & "\cliptemp.txt")
;write clip contents to a temp file
$AClip = FileOpen(@ScriptDir & "\cliptemp.txt", 1)
 
; Check if file opened for writing OK
If $AClip = -1 Then
    MsgBox(0, "Error", "Unable to open file.")
    Exit
EndIf
FileWriteLine($AClip, $ClipContents)
 
FileClose($AClip)
;#ce ----------------------------------------------------------------------------
 
;read contents of temp file into an array
Dim $AClipCont
If Not _FileReadToArray(@ScriptDir & "\cliptemp.txt",$AClipCont) Then
   MsgBox(4096,"Error", " Error reading log to Array     error:" & @error)
   Exit
EndIf
 
local $aSSIDs[1];setup ssid array
$aSSIDs[0] = 0;set the counter to 0
$StartProc = 0 ;processing variable
;start processing the array
For $x = 1 to $AClipCont[0] - 2
	;check if the ssid section has been found
	if $StartProc == 1 Then
		; we need to process the lines here
		$BldStrng = StringLeft($AClipCont[$x],3) & "~"
		$BldStrng = $BldStrng & stringmid($AClipCont[$x],7,17) & "~"
		$BldStrng = $BldStrng & stringmid($AClipCont[$x],25,10)
		_ArrayAdd($aSSIDs,$BldStrng)
		$aSSIDs[0] = $aSSIDs[0] + 1
 
	EndIf
 
	;find the line just before scan starts
	if StringInStr($AClipCont[$x],"address") > 0 Then
		if StringInStr($AClipCont[$x],"ssid") > 0  Then
			;we have found the start - start processing after this
			$StartProc = 1
		EndIf
	EndIf
 
Next
 
;pull ignore list
Dim $aIgnores
If Not _FileReadToArray(@ScriptDir & "\ignore-list.txt",$aIgnores) Then
   MsgBox(4096,"Error", " Error reading log to Array     error:" & @error)
   Exit
EndIf
 
;start of ssid checking
for $x = 1 to $aSSIDs[0]
	$mode = StringLeft($aSSIDs[$x],4);section that has the AP mode
	$ssid = stringstripws(StringRight($aSSIDs[$x],10),2);sets ssid
	$mac = StringMid($aSSIDs[$x],5,17);sets mac
	$ignoreIt = 0;sets ignore variable
	for $y = 1 to $aIgnores[0];loops through ignore file seeinf if we have a match
		$Imac = StringLeft($aIgnores[$y],17);sets ignore mac
		$Issid = stringstripws(StringMid($aIgnores[$y],StringInStr($aIgnores[$y],"~") + 1),2);sets ignore ssid
		if $mac == $Imac and $ssid == $Issid Then;checks for ignore
			;this is an ignore match, set it to ignore
			$ignoreIt = 1
		EndIf
	Next
	if StringInStr($mode,"p") > 0 Then ;check if AP is protected
		;this is protected
	Elseif $ignoreIt == 0 Then
		;not protected and not ignored, try it out
		_ConnectToAP();connect to ap and test
	EndIf
Next
;kill putty process we started
ProcessClose($puttyPID)
EndFunc
 
 
;--------------------------begin functions
 
func _ConnectToAP()
	;connect to AP
	;activate putty
	WinActivate($HostIP & " - PuTTY")
	WinWaitActive($HostIP & " - PuTTY")
	send("/int wire set 0 ssid="  & StringStripWS($ssid,2) & @CRLF);set the ssid
	_SleepTime(15,"ssid command")
	Send("/ip dhcp-client release 0" & @CRLF);reset client dhcp
	_SleepTime(10,"dhcp client to pull ip")
	send('/tool fetch url="http://' & $serverIP & $serverPathFile & @CRLF);attempt to pull the rogue file
	_SleepTime(10,"rogue file to download")
 
	;check status of download
	send("q" & @CRLF);send a q for quit just in case the DL needs to be cancled
	sleep(1000)
	_CopyAll()
	if StringInStr($ClipContents,"status: finished") > 0 then
		;OMG, we found a rogue...PANIC!
		;send email and then ping
		ToolTip("Rogue detected and email/ping started",0,0)
		_SendEmail()
		Send("/ping " & $serverIP & @CRLF);start pinging our rogue server
		Exit;kill the program
	EndIf
 
EndFunc
 
Func _SendEmail()
    Local $ConnectedSocket, $szData
 
    ; Start The TCP Services
    ;==============================================
    TCPStartup()
 
    ; Initialize a variable to represent a connection
    ;==============================================
    $ConnectedSocket = -1
 
    ;Attempt to connect to SERVER at its IP and PORT 33891
    ;=======================================================
    $ConnectedSocket = TCPConnect($szIPADDRESS, $nPORT)
 
    ; If there is an error... show it
    If @error Then
        MsgBox(4112, "Error", "TCPConnect failed with WSA error: " & @error)
        ; If there is no error loop an inputbox for data
        ;   to send to the SERVER.
    Else
            TCPSend($ConnectedSocket, "ehlo rogue-check.com" & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "helo rogue-check.com" & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "mail from:ISeeYou@rogue-check.com" & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "rcpt to:" & $EmailAddress & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "data" & @crlf)
			sleep(1500)
			TCPSend($ConnectedSocket, "Subject:Rogue Detected on " & $HostIP & @crlf & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "Rogue detected from "& $HostIP & ", SSID is " & $ssid & "and MAC of AP is " & $mac & ".  Getem!" & @crlf)
			sleep(1500)
            TCPSend($ConnectedSocket, "." & @crlf)
			sleep(1000)
			TCPCloseSocket($ConnectedSocket)
 
    EndIf
EndFunc
 
Func _CopyAll()
	$ClipContents = "";clear our variable
	;activate putty
	WinActivate($HostIP & " - PuTTY")
	WinWaitActive($HostIP & " - PuTTY")
	$PuttyPos = WinGetPos($HostIP & " - PuTTY") ;get current position of putty window
 
	;start the copy process
	MouseClick("left",$PuttyPos[0] + 15, $PuttyPos[1] + 15,1,0)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{DOWN}")
	Sleep(150)
	Send("{ENTER}")
 
	$ClipContents = clipget();populate our clip variable
EndFunc
 
Func _SleepTime($SleepTime,$DescMsg)
	;this function just does the sleep timer
	while $SleepTime <> 0
		ToolTip("Sleeping " & $SleepTime & " more seconds for " & $DescMsg,0,0)
		$SleepTime = $SleepTime - 1
		Sleep(1000)
	WEnd
EndFunc

*********************************************************
UPDATE
*********************************************************
I’ve always wanted to be on wikipedia…so I took this opportunity to add myself.

2 Comments

leave a comment
  1. Natheer / Oct 15 2011

    thanks for the awesome trick … thank you also for the shirts it’s so cool .

  2. Greg / Oct 15 2011

    @Natheer
    Thanks for the comment! I figured that if I hounded you guys enough you would post comments 😉
    Thanks you also for attending my the MUM and also my presentation. I tried to go with something different and hopefully interesting. Without you guys this blog doesn’t exist, so keep interacting!

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