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CTCore.py
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CTCore.py
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#
# CapTipper is a malicious HTTP traffic explorer tool
# By Omri Herscovici <omriher AT gmail.com>
# http://omriher.com
# @omriher
#
# This file is part of CapTipper
#
# CapTipper is a free software under the GPLv3 License
#
from collections import namedtuple
import StringIO
import json
import urllib
import urllib2
import os
import collections
import urlparse
import gzip
import re
import sys
import zipfile
from CTMagic import Whatype
newLine = os.linesep
conversations = []
objects = []
Errors = []
hosts = collections.OrderedDict()
request_logs = []
plugins = []
plugins_folder = "plugins/"
pcap_file = ""
VERSION = "0.3"
BUILD = "13"
ABOUT = "CapTipper v" + VERSION + " b" + BUILD + " - Malicious HTTP traffic explorer tool" + newLine + \
"Copyright 2015 Omri Herscovici <omriher@gmail.com>" + newLine
USAGE = ("CapTipper.py <pcap_file> [options]" + newLine + newLine +
"Examples: CapTipper.py ExploitKit.pcap - explore and start server on port 80" + newLine +
" CapTipper.py ExploitKit.pcap -p 1234 - explore and start server on port 1234" + newLine +
" CapTipper.py ExploitKit.pcap -d /tmp/ - dumps all files and exit" + newLine +
" CapTipper.py ExploitKit.pcap -r /tmp/ - create json & html report and exit" + newLine +
" CapTipper.py ExploitKit.pcap -s - explore without web server" + newLine)
# WS configurations
web_server_turned_on = False
HOST = "0.0.0.0"
PORT = 80
console_output = False
b_use_short_uri = False
b_auto_ungzip = False
class msg_type:
GOOD = 0
ERROR = 1
INFO = 2
class colors:
SKY = '\033[36m'
PINK = '\033[35m'
BLUE = '\033[34m'
GREEN = '\033[32m'
YELLOW = '\033[33m'
RED = '\033[31m'
END = '\033[0;0m'
#END = '\033[37m'
STRONG_BRIGHT = '\033[1m'
NORMAL_BRIGHT = '\033[22m'
# VirusTotal PUBLIC API KEY
VT_APIKEY = ""
try:
WhatypeMagic = Whatype(os.path.join(os.path.dirname(os.path.realpath(__file__)),"magics.csv"))
except Exception, e:
Errors.append("Couldn't load Whatype for magic identification: " + e.message)
class client_struct:
def __init__(self):
self.headers = collections.OrderedDict()
self.headers["IP"] = ""
self.headers["MAC"] = ""
self.ignore_headers = ['ACCEPT','ACCEPT-ENCODING','ACCEPT-LANGUAGE','CONNECTION','HOST','REFERER', \
'CACHE-CONTROL','CONTENT-TYPE', 'COOKIE', 'CONTENT-LENGTH', 'X-REQUESTED-WITH', \
'IF-MODIFIED-SINCE','IF-NONE-MATCH','ORIGIN','ACCEPT-ASTEROPE','IF-UNMODIFIED-SINCE']
def add_header(self, key, value):
if not self.headers.has_key(key.upper()) and not key.upper() in self.ignore_headers:
self.headers[key.upper()] = value
def get_information(self):
return self.headers
def alert_message(text, type):
if type == msg_type.GOOD:
message = colors.GREEN + "[+] " + colors.END
elif type == msg_type.ERROR:
message = colors.RED + " [E] " + colors.END
elif type == msg_type.INFO:
message = colors.YELLOW + "[!] " + colors.END
message += text
print message
def show_errors():
global Errors
if len(Errors) > 0:
for err in Errors:
print err
def check_errors():
global Errors
if len(Errors) > 0:
return True
else:
return False
# Client Information object
client = client_struct()
activity_date_time = ""
def add_object(type, value, id=-1, empty=False, name=""):
object_num = len(objects)
objects.append(collections.namedtuple('obj', ['type', 'value', 'conv_id', 'name']))
objects[object_num].type = type
if not empty:
objects[object_num].value = value
if id != -1:
objects[object_num].conv_id = str(id)
objects[object_num].name = type + "-" + get_name(id)
else:
objects[object_num].conv_id = str(object_num)
objects[object_num].name = name
return object_num
def fmt_size(size_bytes):
for unit in ['B','KB','MB','GB','TB']:
if size_bytes < 1024.0:
return "%3.1f %s" % (size_bytes, unit)
size_bytes /= 1024.0
return "{%3.1f} {}".format(size_bytes, 'PB')
def get_name(id):
name = ""
try:
name = objects[int(id)].name
finally:
return name
def show_hosts():
for host, ip in hosts.keys():
print " " + host + " ({})".format(ip)
hostkey = (host, ip)
for host_uri,obj_num in hosts[hostkey]:
#chr_num = 195 # Extended ASCII tree symbol
chr_num = 9500 # UNICODE tree symbol
# Checks if last one
if ((host_uri,obj_num) == hosts[hostkey][len(hosts[hostkey]) - 1]):
#chr_num = 192 # Extended ASCII tree symbol
chr_num = 9492 # UNICODE tree symbol
try:
print " " + unichr(chr_num) + "-- " + host_uri.encode('utf8') + " [{}]".format(obj_num)
except:
print " |-- " + host_uri.encode('utf8') + " [{}]".format(obj_num)
print newLine
def check_duplicate_url(host, uri):
bDup = False
for conv in conversations:
if (conv.uri.lower() == uri.lower()) and (conv.host.lower() == host.lower()):
bDup = True
break
return bDup
def check_duplicate_uri(uri):
bDup = False
for conv in conversations:
if (conv.uri.lower() == uri.lower()):
bDup = True
break
return bDup
# In case of a duplicate URI, turns "/index.html" to "/index.html(2)"
def create_next_uri(uri):
duplicate_uri = True
orig_uri = uri
uri_num = 2
while duplicate_uri:
duplicate_uri = False
for conv in conversations:
if (conv.uri.lower() == uri.lower()):
uri = orig_uri + "(" + str(uri_num) + ")"
uri_num += 1
duplicate_uri = True
break
return uri
SHORT_URI_SIZE = 20
def getShortURI(uri):
shortURL = uri
if len(uri) > SHORT_URI_SIZE:
shortURL = uri[0:int(SHORT_URI_SIZE/2)] + "..." + uri[len(uri)-int(SHORT_URI_SIZE/2):len(uri)]
return shortURL
def byTime(Conv):
return int(Conv.req_microsec)
def sort_convs():
conversations.sort(key=byTime)
for cnt, conv in enumerate(conversations):
conv.id = cnt
add_object("body", conv.res_body)
objects[cnt].name = conv.filename
# Populating hosts list
host_tuple = (conv.host, conv.server_ip_port)
if (hosts.has_key(host_tuple)):
hosts[host_tuple].append((conv.uri,str(cnt)))
else:
hosts[host_tuple] = [(conv.uri,str(cnt))]
def check_order(Conv):
for curr_conv in conversations:
if int(curr_conv.req_microsec) > int(str(Conv.time)[:10]):
return False
return True
def finish_conversation(self):
if not (check_duplicate_url(self.host, self.uri)):
#if check_duplicate_uri(self.uri):
# self.uri = create_next_uri(self.uri)
obj_num = len(conversations)
conversations.append(namedtuple('Conv',
['id','server_ip_port', 'uri','req','res_body','res_head','res_num','res_type','host','referer', \
'filename','method','redirect_to','req_microsec', 'res_len','magic_name', 'magic_ext']))
# convs list
conversations[obj_num].id = obj_num
conversations[obj_num].server_ip_port = str(self.remote_host[0]) + ":" + str(self.remote_host[1])
conversations[obj_num].uri = self.uri
conversations[obj_num].redirect_to = self.redirect_to
conversations[obj_num].short_uri = getShortURI(self.uri)
conversations[obj_num].req = self.req
conversations[obj_num].res_body = self.res_body
try:
# FindMagic
mgc_name = ""
mgc_ext = ""
mgc_name, mgc_ext = WhatypeMagic.identify_buffer(self.res_body)
except:
pass
conversations[obj_num].magic_name = mgc_name.rstrip()
conversations[obj_num].magic_ext = mgc_ext.rstrip()
conversations[obj_num].orig_chunked_resp = self.orig_chunked_resp
conversations[obj_num].orig_resp = self.orig_resp
conversations[obj_num].res_head = self.res_head
conversations[obj_num].res_num = self.res_num
if ";" in self.res_type:
conversations[obj_num].res_type = self.res_type[:self.res_type.find(";")]
else:
conversations[obj_num].res_type = self.res_type
conversations[obj_num].host = self.host
conversations[obj_num].referer = self.referer
conversations[obj_num].filename = self.filename
conversations[obj_num].method = self.method
conversations[obj_num].req_microsec = str(self.time)[:10]
# In case no filename was given from the server, split by URI
if (conversations[obj_num].filename == ""):
uri_name = urlparse.urlsplit(str(conversations[obj_num].uri)).path
conversations[obj_num].filename = uri_name.split('/')[-1]
if (str(conversations[obj_num].filename).find('?') > 0):
conversations[obj_num].filename = \
conversations[obj_num].filename[:str(conversations[obj_num].filename).find('?')]
if (str(conversations[obj_num].filename).find('&') > 0):
conversations[obj_num].filename = \
conversations[obj_num].filename[:str(conversations[obj_num].filename).find('&')]
# In case the URI was '/' then this is still empty
if (conversations[obj_num].filename == ""):
conversations[obj_num].filename = str(obj_num) + ".html"
conversations[obj_num].res_len = self.res_len
# Display all found conversations
def show_conversations():
if (b_use_short_uri):
alert_message("Displaying shortened URI paths" + newLine, msg_type.INFO)
for cnt, conv in enumerate(conversations):
try:
typecolor = colors.END
if ("pdf" in conv.res_type):
typecolor = colors.RED
elif ("javascript" in conv.res_type):
typecolor = colors.BLUE
elif ("octet-stream" in conv.res_type) or ("application" in conv.res_type):
typecolor = colors.YELLOW
elif ("image" in conv.res_type):
typecolor = colors.GREEN
print str(conv.id) + ": " + colors.PINK,
if (b_use_short_uri):
print conv.short_uri,
else:
print conv.uri,
print colors.END + " -> " + conv.res_type,
if (conv.filename != ""):
print typecolor + "(" + conv.filename.rstrip() + ")" + colors.END + " [" + str(fmt_size(conv.res_len)) + "]",
# If magic found
if conv.magic_ext != "":
print " (Magic: " + colors.STRONG_BRIGHT + "{}".format(conv.magic_ext) + colors.NORMAL_BRIGHT + ")"
else:
print ""
else:
print newLine
except:
pass
print ""
def show_objects():
print "Displaying Objects:" + newLine
print " ID CID TYPE NAME"
print "---- ----- ----------- --------"
for id, obj in enumerate(objects):
print "{0:3} | {1:3} | {2:11} | {3}".format(id, obj.conv_id, obj.type, obj.name)
def hexdump(src, length=16):
result = []
digits = 4 if isinstance(src, unicode) else 2
for i in xrange(0, len(src), length):
s = src[i:i + length]
hexa = b' '.join(["%0*X" % (digits, ord(x)) for x in s])
text = b''.join([x if 0x20 <= ord(x) < 0x7F else b'.' for x in s])
result.append(b"%04X %-*s %s" % (i, length * (digits + 1), hexa, text))
return b'\n'.join(result)
from HTMLParser import HTMLParser
class srcHTMLParser(HTMLParser):
def __init__(self, find_tag):
HTMLParser.__init__(self)
self.find_tag = find_tag
self.tags = []
def handle_starttag(self, tag, attrs):
if tag == self.find_tag:
for att in attrs:
if att[0] == "src":
self.tags.append(att[1])
def print_objects(self):
if len(self.tags) > 0:
print " " + str(len(self.tags)) + " {}(s) Found!".format(self.find_tag) + newLine
for cnt, curr_tag in enumerate(self.tags):
print " [I] " + str(cnt + 1) + " : " + curr_tag
else:
print " No {} Found".format(self.find_tag)
def update_captipper():
currentVersion = "v{} b{}".format(VERSION,BUILD)
rawURL = "https://raw.githubusercontent.com/omriher/CapTipper/master/"
archiveURL = "https://github.com/omriher/CapTipper/archive/"
CoreFile = "CTCore.py"
CTArchive = "master.zip"
CoreURL = rawURL + CoreFile
print "Checking for updates (Current version: {})".format(currentVersion)
try:
print "Connecting to CapTipper Repository"
coreRepFile = urllib2.urlopen(CoreURL).read()
except:
sys.exit("[-] Error connecting to CapTipper repository")
verPattern = "VERSION = " + chr(34) + "(.*)" + chr(34) + "\s*?BUILD = " + chr(34) + "(.*)" + chr(34)
repoVer = re.findall(verPattern, coreRepFile)
if repoVer:
newVersion = "v{} b{}".format(repoVer[0][0],repoVer[0][1])
else:
sys.exit('[-] Error getting repository version')
if newVersion == currentVersion:
sys.exit("[+] You have the newest version!")
else:
print "[+] Updating CapTipper to {}".format(newVersion)
bPackSize = False
nAttempts = 0
while (not bPackSize and nAttempts < 3):
try:
url = archiveURL + CTArchive
u = urllib2.urlopen(url)
content_length = u.info().getheaders("content-length")
if len(content_length) > 0:
file_size = int(content_length[0])
bPackSize = True
else:
print("[-] Couldn't get package size, Retrying ({} / 3)...".format(str(nAttempts)))
except Exception,e:
sys.exit("[-] Error downloading update: {}".format(e.message))
finally:
nAttempts += 1
if not bPackSize:
sys.exit("[-] Couldn't get package size, Please try again later...")
try:
package_name = "CapTipper-package.zip"
f = open(package_name, 'wb')
file_downloaded = 0
block_size = 8192
while True:
buffer = u.read(block_size)
if not buffer:
break
file_downloaded += len(buffer)
f.write(buffer)
output = "[+] Downloading {0:.2f}%".format(file_downloaded * 100. / file_size)
sys.stdout.write('\r%s' % output)
sys.stdout.flush()
f.close()
CapTipper_Folder = os.path.dirname(os.path.realpath(__file__))
except Exception, e:
print "[-] Error downloading file: {}".format(e.message)
print "\nExtracting Files..."
try:
z = zipfile.ZipFile('CapTipper-package.zip')
master_folder = ""
for name in z.namelist():
if not master_folder:
master_folder = name[:-1]
full_path = CapTipper_Folder + name.replace(master_folder,"")
# Case of directory
if full_path.endswith(r"/"):
if not os.path.exists(full_path):
os.makedirs(full_path)
else:
if os.name == 'nt':
full_path = full_path.replace("/",r"\\")
print "Extracting {}".format(full_path)
with open(full_path,"wb") as out:
out.write(z.read(name))
try:
os.remove("CapTipper-package.zip")
except Exception, ed:
print "Failed deleting CapTipper-package.zip : " + ed.message
print "Update Complete! (New version: {})".format(newVersion)
except Exception,e:
sys.exit("Failed extracting files: {}".format(e.message))
sys.exit("Finished updating CapTipper")
def send_to_vt(md5, key_vt):
if key_vt == "":
return(-1, "No Public API Key Found")
url_vt = 'https://www.virustotal.com/vtapi/v2/file/report'
params = {'resource':md5,'apikey':key_vt}
try:
body = urllib.urlencode(params)
req = urllib2.Request(url_vt, body)
res = urllib2.urlopen(req)
res_json = res.read()
except:
return (-1, 'Request to VirusTotal Failed')
try:
json_dict = json.loads(res_json)
except:
return (-1, 'Error during VirusTotal response parsing')
return (0, json_dict)
def get_strings(content):
strings = re.findall("[\x1f-\x7e]{5,}", content)
strings += [str(ws.decode("utf-16le")) for ws in re.findall("(?:[\x1f-\x7e][\x00]){5,}", content)]
return strings
def get_request_size(id, size, full_request=False):
if int(id) >= len(objects) or int(id) < 0:
raise Exception(" ID number " + str(id) + " isn't within range")
request = conversations[int(id)].req
if (size.lower() == "all"):
size = len(request)
else:
size = int(size)
request = request[0:size]
if len(request) < size:
size = len(request)
return request, size
def get_response_and_size(id, size, full_response=False):
global Errors
Errors = []
if int(id) >= len(objects) or int(id) < 0:
raise Exception(" ID number " + str(id) + " isn't within range")
# if full response is needed and not just the body
if (full_response):
body = conversations[int(id)].header + '\r\n\r\n' + conversations[int(id)].res_body
else:
body = objects[int(id)].value
if not (isinstance(body, basestring)):
comp_header = conversations[int(id)].res_head
test_res = conversations[int(id)].res_head + "\r\n\r\n" + conversations[int(id)].orig_chunked_resp
body = ""
if (comp_header + "\r\n\r\n" == test_res):
#print colors.RED + newLine + "[E] Object: {} ({}) : Response body was empty, showing header instead".format(id, CTCore.objects[int(id)].name) + colors.END + newLine
Errors.append(colors.RED + newLine + "[E] Object: {} ({}) : Response body was empty".format(id, objects[int(id)].name) + colors.END + newLine)
else:
#print colors.RED + newLine + "[E] Object: {} ({}) : Couldn't retrieve BODY, showing full response instead".format(id, CTCore.objects[int(id)].name) + colors.END + newLine
Errors.append(colors.RED + newLine + "[E] Object: {} ({}) : Couldn't retrieve BODY".format(id, objects[int(id)].name) + colors.END + newLine)
if (size != "all"):
size = size * 2
if (size == "all"):
response = body
size = len(response)
else:
size = int(size)
response = body[0:size]
if len(response) < size:
size = len(response)
return response, size
def ungzip_all():
for conv in conversations:
try:
if conv.res_head.lower().find("gzip") > -1:
name = ""
try:
id = int(conv.id)
name = get_name(id)
obj_num, name = ungzip_and_add(id)
if obj_num != -1:
print " GZIP Decompression of object {} ({}) successful!".format(str(id), name)
print " New object created: {}".format(obj_num) + newLine
except Exception, e:
print "Error in: {} - {}".format(name,str(e))
except:
pass
def ungzip(id):
body, sz = get_response_and_size(id, "all")
obj_num = -1
name = ""
if not check_errors():
name = get_name(id)
decomp = gzip.GzipFile('', 'rb', 9, StringIO.StringIO(body))
page = decomp.read()
return page, name
def ungzip_and_add(id):
page, name = ungzip(id)
obj_num = add_object("ungzip",page,id=id)
return obj_num, name
def dump_all_files(path, dump_exe):
for i in range(0,len(objects)):
try:
if (not objects[i].name.lower().endswith(".exe")) or dump_exe:
dump_file(i, os.path.join(path, str(i) + "-" + objects[i].name))
except Exception, ef:
print str(ef)
def dump_file(id, path):
id = int(id)
body, sz = get_response_and_size(id, "all")
show_errors()
f = open(path, "wb")
f.write(body)
f.close()
print " Object {} written to {}".format(id, path)
def find_plugin(name):
for plug in plugins:
if plug.name.lower() == name.lower():
return plug.module
return None
def run_plugin(name, *args):
try:
module = find_plugin(name)
if module:
current = module()
result = current.run(*args)
return result
else:
return "Plugin " + name + " Does not exist"
except Exception,e:
print str(e)