/
logontracer.py
1863 lines (1630 loc) · 78.6 KB
/
logontracer.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# LICENSE
# Please refer to the LICENSE.txt in the https://github.com/JPCERTCC/aa-tools/
#
import os
import sys
import re
import pickle
import shutil
import argparse
import datetime
import subprocess
from ssl import create_default_context
try:
from lxml import etree
has_lxml = True
except ImportError:
has_lxml = False
try:
from evtx import PyEvtxParser
has_evtx = True
except ImportError:
has_evtx = False
try:
from py2neo import Graph, GraphService
has_py2neo = True
except ImportError:
has_py2neo = False
try:
import numpy as np
has_numpy = True
except ImportError:
has_numpy = False
try:
import changefinder
has_changefinder = True
except ImportError:
has_changefinder = False
try:
from flask import Flask, render_template, request
has_flask = True
except ImportError:
has_flask = False
try:
import pandas as pd
has_pandas = True
except ImportError:
has_pandas = False
try:
from hmmlearn import hmm
has_hmmlearn = True
except ImportError:
has_hmmlearn = False
try:
from sklearn.externals import joblib
has_sklearn = True
except ImportError:
has_sklearn = False
try:
from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search, Q
has_es = True
except ImportError:
has_es = False
# neo4j password
NEO4J_PASSWORD = "password"
# neo4j user name
NEO4J_USER = "neo4j"
# neo4j server
NEO4J_SERVER = "localhost"
# neo4j listen port
NEO4J_PORT = "7474"
# Web application port
WEB_PORT = 8080
# Web application address
WEB_HOST = "0.0.0.0"
# Websocket port
WS_PORT = 7687
# Elastic Search server
ES_SERVER = "localhost:9200"
# Elastic index
ES_INDEX = "winlogbeat-*"
# Elastic prefix
ES_PREFIX = "winlog"
# Elastic auth user
ES_USER = "elastic"
# Check Event Id
EVENT_ID = [4624, 4625, 4662, 4768, 4769, 4776, 4672, 4720, 4726, 4728, 4729, 4732, 4733, 4756, 4757, 4719, 5137, 5141]
# EVTX Header
EVTX_HEADER = b"\x45\x6C\x66\x46\x69\x6C\x65\x00"
# String Check list
UCHECK = r"[%*+=\[\]\\/|;:\"<>?,&]"
HCHECK = r"[*\\/|:\"<>?&]"
# IPv4 regex
IPv4_PATTERN = re.compile(r"\A\d+\.\d+\.\d+\.\d+\Z", re.DOTALL)
# IPv6 regex
IPv6_PATTERN = re.compile(r"\A(::(([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})){0,5})?|([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(::(([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})){0,4})?|:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(::(([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})){0,3})?|:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(::(([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})){0,2})?|:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(::(([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3}))?)?|:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})(::([0-9a-f]|[1-9a-f][0-9a-f]{1,3})?|(:([0-9a-f]|[1-9a-f][0-9a-f]{1,3})){3}))))))\Z", re.DOTALL)
# LogonTracer folder path
FPATH = os.path.dirname(os.path.abspath(__file__))
# CategoryId
CATEGORY_IDs = {
"%%8280": "Account_Logon",
"%%8270": "Account_Management",
"%%8276": "Detailed_Tracking",
"%%8279": "DS_Access",
"%%8273": "Logon/Logoff",
"%%8274": "Object_Access",
"%%8277": "Policy_Change",
"%%8275": "Privilege_Use",
"%%8272": "System"}
# Auditing Constants
AUDITING_CONSTANTS = {
"{0cce9210-69ae-11d9-bed3-505054503030}": "SecurityStateChange",
"{0cce9211-69ae-11d9-bed3-505054503030}": "SecuritySubsystemExtension",
"{0cce9212-69ae-11d9-bed3-505054503030}": "Integrity",
"{0cce9213-69ae-11d9-bed3-505054503030}": "IPSecDriverEvents",
"{0cce9214-69ae-11d9-bed3-505054503030}": "Others",
"{0cce9215-69ae-11d9-bed3-505054503030}": "Logon",
"{0cce9216-69ae-11d9-bed3-505054503030}": "Logoff",
"{0cce9217-69ae-11d9-bed3-505054503030}": "AccountLockout",
"{0cce9218-69ae-11d9-bed3-505054503030}": "IPSecMainMode",
"{0cce9219-69ae-11d9-bed3-505054503030}": "IPSecQuickMode",
"{0cce921a-69ae-11d9-bed3-505054503030}": "IPSecUserMode",
"{0cce921b-69ae-11d9-bed3-505054503030}": "SpecialLogon",
"{0cce921c-69ae-11d9-bed3-505054503030}": "Others",
"{0cce921d-69ae-11d9-bed3-505054503030}": "FileSystem",
"{0cce921e-69ae-11d9-bed3-505054503030}": "Registry",
"{0cce921f-69ae-11d9-bed3-505054503030}": "Kernel",
"{0cce9220-69ae-11d9-bed3-505054503030}": "Sam",
"{0cce9221-69ae-11d9-bed3-505054503030}": "CertificationServices",
"{0cce9222-69ae-11d9-bed3-505054503030}": "ApplicationGenerated",
"{0cce9223-69ae-11d9-bed3-505054503030}": "Handle",
"{0cce9224-69ae-11d9-bed3-505054503030}": "Share",
"{0cce9225-69ae-11d9-bed3-505054503030}": "FirewallPacketDrops",
"{0cce9226-69ae-11d9-bed3-505054503030}": "FirewallConnection",
"{0cce9227-69ae-11d9-bed3-505054503030}": "Other",
"{0cce9228-69ae-11d9-bed3-505054503030}": "Sensitive",
"{0cce9229-69ae-11d9-bed3-505054503030}": "NonSensitive",
"{0cce922a-69ae-11d9-bed3-505054503030}": "Others",
"{0cce922b-69ae-11d9-bed3-505054503030}": "ProcessCreation",
"{0cce922c-69ae-11d9-bed3-505054503030}": "ProcessTermination",
"{0cce922d-69ae-11d9-bed3-505054503030}": "DpapiActivity",
"{0cce922e-69ae-11d9-bed3-505054503030}": "RpcCall",
"{0cce922f-69ae-11d9-bed3-505054503030}": "AuditPolicy",
"{0cce9230-69ae-11d9-bed3-505054503030}": "AuthenticationPolicy",
"{0cce9231-69ae-11d9-bed3-505054503030}": "AuthorizationPolicy",
"{0cce9232-69ae-11d9-bed3-505054503030}": "MpsscvRulePolicy",
"{0cce9233-69ae-11d9-bed3-505054503030}": "WfpIPSecPolicy",
"{0cce9234-69ae-11d9-bed3-505054503030}": "Others",
"{0cce9235-69ae-11d9-bed3-505054503030}": "UserAccount",
"{0cce9236-69ae-11d9-bed3-505054503030}": "ComputerAccount",
"{0cce9237-69ae-11d9-bed3-505054503030}": "SecurityGroup",
"{0cce9238-69ae-11d9-bed3-505054503030}": "DistributionGroup",
"{0cce9239-69ae-11d9-bed3-505054503030}": "ApplicationGroup",
"{0cce923a-69ae-11d9-bed3-505054503030}": "Others",
"{0cce923b-69ae-11d9-bed3-505054503030}": "DSAccess",
"{0cce923c-69ae-11d9-bed3-505054503030}": "AdAuditChanges",
"{0cce923d-69ae-11d9-bed3-505054503030}": "Replication",
"{0cce923e-69ae-11d9-bed3-505054503030}": "DetailedReplication",
"{0cce923f-69ae-11d9-bed3-505054503030}": "CredentialValidation",
"{0cce9240-69ae-11d9-bed3-505054503030}": "Kerberos",
"{0cce9241-69ae-11d9-bed3-505054503030}": "Others",
"{0cce9242-69ae-11d9-bed3-505054503030}": "KerbCredentialValidation",
"{0cce9243-69ae-11d9-bed3-505054503030}": "NPS"}
# Flask instance
if not has_flask:
sys.exit("[!] Flask must be installed for this script.")
else:
app = Flask(__name__)
parser = argparse.ArgumentParser(description="Visualizing and analyzing active directory Windows logon event logs.")
parser.add_argument("-r", "--run", action="store_true", default=False,
help="Start web application.")
parser.add_argument("-l", "--learn", action="store_true", default=False,
help="Machine learning event logs using Hidden Markov Model.")
parser.add_argument("-o", "--port", dest="port", action="store", type=int, metavar="PORT",
help="Port number to be started web application. (default: 8080).")
parser.add_argument("--host", dest="host", action="store", type=str, metavar="HOST",
help="Host address to bind the web application. (default: 0.0.0.0).")
parser.add_argument("--es-server", dest="esserver", action="store", type=str, metavar="ESSERVER",
help="Elastic Search server address. (default: localhost:9200)")
parser.add_argument("--es-index", dest="esindex", action="store", type=str, metavar="ESINDEX",
help="Elastic Search index to search. (default: winlogbeat-*)")
parser.add_argument("--es-prefix", dest="esprefix", action="store", type=str, metavar="ESPREFIX",
help="Elastic Search event object prefix. (default: winlog)")
parser.add_argument("--es-user", dest="esuser", action="store", type=str, metavar="ESUSER",
help="Elastic Search ssl authentication user. (default: elastic)")
parser.add_argument("--es-pass", dest="espassword", action="store", type=str, metavar="ESPASSWORD",
help="Elastic Search ssl authentication password.")
parser.add_argument("--es-cafile", dest="escafile", action="store", type=str, metavar="ESCAFILE",
help="Elastic Search ssl cert file.")
parser.add_argument("--es", action="store_true", default=False,
help="Import data from Elastic Search. (default: False)")
parser.add_argument("--postes", action="store_true", default=False,
help="Post data to Elastic Search. (default: False)")
parser.add_argument("-s", "--server", dest="server", action="store", type=str, metavar="SERVER",
help="Neo4j server. (default: localhost)")
parser.add_argument("-u", "--user", dest="user", action="store", type=str, metavar="USERNAME",
help="Neo4j account name. (default: neo4j)")
parser.add_argument("-p", "--password", dest="password", action="store", type=str, metavar="PASSWORD",
help="Neo4j password. (default: password).")
parser.add_argument("--wsport", dest="wsport", action="store", type=str, metavar="PORT",
help="Neo4j websocket port number. (default: 7687).")
parser.add_argument("-e", "--evtx", dest="evtx", nargs="*", action="store", type=str, metavar="EVTX",
help="Import to the AD EVTX file. (multiple files OK)")
parser.add_argument("-x", "--xml", dest="xmls", nargs="*", action="store", type=str, metavar="XML",
help="Import to the XML file for event log. (multiple files OK)")
parser.add_argument("-z", "--timezone", dest="timezone", action="store", type=int, metavar="UTC",
help="Event log time zone. (for example: +9) (default: GMT)")
parser.add_argument("-f", "--from", dest="fromdate", action="store", type=str, metavar="DATE",
help="Parse Security Event log from this time. (for example: 2017-01-01T00:00:00)")
parser.add_argument("-t", "--to", dest="todate", action="store", type=str, metavar="DATE",
help="Parse Security Event log to this time. (for example: 2017-02-28T23:59:59)")
parser.add_argument("--add", action="store_true", default=False,
help="Add additional data to Neo4j database. (default: False)")
parser.add_argument("--delete", action="store_true", default=False,
help="Delete all nodes and relationships from this Neo4j database. (default: False)")
args = parser.parse_args()
statement_user = """
MERGE (user:Username{{ user:'{user}' }}) set user.rights='{rights}', user.sid='{sid}', user.rank={rank}, user.status='{status}', user.counts='{counts}', user.counts4624='{counts4624}', user.counts4625='{counts4625}', user.counts4768='{counts4768}', user.counts4769='{counts4769}', user.counts4776='{counts4776}', user.detect='{detect}'
RETURN user
"""
statement_ip = """
MERGE (ip:IPAddress{{ IP:'{IP}' }}) set ip.rank={rank}, ip.hostname='{hostname}'
RETURN ip
"""
statement_r = """
MATCH (user:Username{{ user:'{user}' }})
MATCH (ip:IPAddress{{ IP:'{IP}' }})
CREATE (ip)-[event:Event]->(user) set event.id={id}, event.logintype={logintype}, event.status='{status}', event.count={count}, event.authname='{authname}', event.date={date}
RETURN user, ip
"""
statement_date = """
MERGE (date:Date{{ date:'{Daterange}' }}) set date.start='{start}', date.end='{end}'
RETURN date
"""
statement_domain = """
MERGE (domain:Domain{{ domain:'{domain}' }})
RETURN domain
"""
statement_dr = """
MATCH (domain:Domain{{ domain:'{domain}' }})
MATCH (user:Username{{ user:'{user}' }})
CREATE (user)-[group:Group]->(domain)
RETURN user, domain
"""
statement_del = """
MERGE (date:Deletetime{{ date:'{deletetime}' }}) set date.user='{user}', date.domain='{domain}'
RETURN date
"""
statement_pl = """
MERGE (id:ID{{ id:{id} }}) set id.changetime='{changetime}', id.category='{category}', id.sub='{sub}'
RETURN id
"""
statement_pr = """
MATCH (id:ID{{ id:{id} }})
MATCH (user:Username{{ user:'{user}' }})
CREATE (user)-[group:Policy]->(id) set group.date='{date}'
RETURN user, id
"""
es_doc_user = """
{{"@timestamp":"{datetime}", "user":"{user}", "rights":"{rights}", "sid":"{sid}", "status":"{status}", "rank":{rank}}}
"""
es_doc_ip = """
{{"@timestamp":"{datetime}", "IP":"{IP}", "hostname":"{hostname}", "rank":{rank}}}
"""
if args.user:
NEO4J_USER = args.user
if args.password:
NEO4J_PASSWORD = args.password
if args.server:
NEO4J_SERVER = args.server
if args.port:
WEB_PORT = args.port
if args.host:
WEB_HOST = args.host
if args.wsport:
WS_PORT = args.wsport
if args.esserver:
ES_SERVER = args.esserver
if args.esindex:
ES_INDEX = args.esindex
if args.esprefix:
ES_PREFIX = args.esprefix
if args.esuser:
ES_USER = args.esuser
if args.espassword:
ES_PASSWORD = args.espassword
if args.escafile:
ES_CAFILE = args.escafile
# Web application index.html
@app.route('/')
def index():
return render_template("index.html", server_ip=NEO4J_SERVER, ws_port=WS_PORT, neo4j_password=NEO4J_PASSWORD, neo4j_user=NEO4J_USER)
# Timeline view
@app.route('/timeline')
def timeline():
return render_template("timeline.html", server_ip=NEO4J_SERVER, ws_port=WS_PORT, neo4j_password=NEO4J_PASSWORD, neo4j_user=NEO4J_USER)
# Web application logs
@app.route('/log')
def logs():
with open(FPATH + "/static/logontracer.log", "r") as lf:
logdata = lf.read()
return logdata
# Web application upload
@app.route("/upload", methods=["POST"])
def do_upload():
UPLOAD_DIR = os.path.join(FPATH, 'upload')
filelist = ""
if os.path.exists(UPLOAD_DIR) is False:
os.mkdir(UPLOAD_DIR)
print("[+] make upload folder {0}.".format(UPLOAD_DIR))
try:
timezone = request.form["timezone"]
logtype = request.form["logtype"]
addlog = request.form["addlog"]
for i in range(0, len(request.files)):
loadfile = "file" + str(i)
file = request.files[loadfile]
if file and file.filename:
if "EVTX" in logtype:
filename = os.path.join(UPLOAD_DIR, str(i) + ".evtx")
elif "XML" in logtype:
filename = os.path.join(UPLOAD_DIR, str(i) + ".xml")
else:
continue
file.save(filename)
filelist += filename + " "
if "EVTX" in logtype:
logoption = " -e "
elif "XML" in logtype:
logoption = " -x "
else:
return "FAIL"
if not re.search(r"\A-{0,1}[0-9]{1,2}\Z", timezone):
return "FAIL"
if addlog in "true":
log_option = "--add"
else:
log_option = "--delete"
parse_command = "nohup python3 " + FPATH + "/logontracer.py " + log_option + " -z " + timezone + logoption + filelist + " -s " + NEO4J_SERVER + " -u " + NEO4J_USER + " -p " + NEO4J_PASSWORD + " > " + FPATH + "/static/logontracer.log 2>&1 &"
subprocess.call("rm -f " + FPATH + "/static/logontracer.log > /dev/null", shell=True)
subprocess.call(parse_command, shell=True)
# parse_evtx(filename)
return "SUCCESS"
except:
return "FAIL"
# Load from Elasticsearch
@app.route("/esload", methods=["POST"])
def es_load():
try:
fromdatetime = request.form["fromdatetime"]
todatetime = request.form["todatetime"]
timezone = request.form["timezone"]
es_server = request.form["es_server"]
addlog = request.form["addlog"]
addes = request.form["addes"]
if fromdatetime not in "false":
try:
datetime.datetime.strptime(fromdatetime, "%Y-%m-%dT%H:%M:%S")
fromdatetime = " -f " + fromdatetime
except:
return "FAIL"
else:
fromdatetime = ""
if todatetime not in "false":
try:
datetime.datetime.strptime(todatetime, "%Y-%m-%dT%H:%M:%S")
todatetime = " -t " + todatetime
except:
return "FAIL"
else:
todatetime = ""
es_ip, es_port = es_server.split(":")
if (re.search(IPv4_PATTERN, es_ip) or es_ip in "localhost") and re.search(r"\A\d{2,5}\Z", es_port):
es_server = " --es-server " + es_server
else:
return "FAIL"
if not re.search(r"\A-{0,1}[0-9]{1,2}\Z", timezone):
return "FAIL"
if addlog in "true":
log_option = "--add"
else:
log_option = "--delete"
if addes in "true":
es_option = " --postes "
else:
es_option = ""
parse_command = "nohup python3 " + FPATH + "/logontracer.py --es " + log_option + es_option + " -z " + timezone + fromdatetime + todatetime + es_server + " -s " + NEO4J_SERVER + " -u " + NEO4J_USER + " -p " + NEO4J_PASSWORD + " --es-index " + ES_INDEX + " --es-prefix " + ES_PREFIX + " > " + FPATH + "/static/logontracer.log 2>&1 &"
subprocess.call("rm -f " + FPATH + "/static/logontracer.log > /dev/null", shell=True)
subprocess.call(parse_command, shell=True)
return "SUCCESS"
except:
return "FAIL"
# Calculate ChangeFinder
def adetection(counts, users, starttime, tohours):
count_array = np.zeros((5, len(users), tohours + 1))
count_all_array = []
result_array = []
cfdetect = {}
for _, event in counts.iterrows():
column = int((datetime.datetime.strptime(event["dates"], "%Y-%m-%d %H:%M:%S") - starttime).total_seconds() / 3600)
row = users.index(event["username"])
# count_array[row, column, 0] = count_array[row, column, 0] + count
if event["eventid"] == 4624:
count_array[0, row, column] = event["count"]
elif event["eventid"] == 4625:
count_array[1, row, column] = event["count"]
elif event["eventid"] == 4768:
count_array[2, row, column] = event["count"]
elif event["eventid"] == 4769:
count_array[3, row, column] = event["count"]
elif event["eventid"] == 4776:
count_array[4, row, column] = event["count"]
# count_average = count_array.mean(axis=0)
count_sum = np.sum(count_array, axis=0)
count_average = count_sum.mean(axis=0)
num = 0
for udata in count_sum:
cf = changefinder.ChangeFinder(r=0.04, order=1, smooth=5)
ret = []
for i in count_average:
cf.update(i)
for i in udata:
score = cf.update(i)
ret.append(round(score, 2))
result_array.append(ret)
cfdetect[users[num]] = max(ret)
count_all_array.append(udata.tolist())
for var in range(0, 5):
con = []
for i in range(0, tohours + 1):
con.append(count_array[var, num, i])
count_all_array.append(con)
num += 1
return count_all_array, result_array, cfdetect
# Calculate PageRank
def pagerank(event_set, admins, hmm, cf, ntml):
graph = {}
nodes = []
for _, events in event_set.iterrows():
nodes.append(events["ipaddress"])
nodes.append(events["username"])
for node in list(set(nodes)):
links = []
for _, events in event_set.iterrows():
if node in events["ipaddress"]:
links.append(events["username"])
if node in events["username"]:
links.append(events["ipaddress"])
graph[node] = links
# d = 0.85
numloops = 30
ranks = {}
d = {}
npages = len(graph)
# Calc damping factor and initial value
for page in graph:
if page in admins:
df = 0.6
elif "@" in page[-1]:
df = 0.85
else:
df = 0.8
if page in hmm:
df -= 0.2
if page in ntml:
df -= 0.1
if page in cf:
df -= cf[page] / 200
d[page] = df
ranks[page] = 1.0 / npages
for i in range(0, numloops):
newranks = {}
for page in graph:
newrank = (1 - d[page]) / npages
for node in graph:
if page in graph[node]:
newrank = newrank + d[node] * ranks[node]/len(graph[node])
newranks[page] = newrank
ranks = newranks
nranks = {}
max_v = max(ranks.values())
min_v = min(ranks.values())
for key, value in ranks.items():
nranks[key] = (value - min_v) / (max_v - min_v)
return nranks
# Calculate Hidden Markov Model
def decodehmm(frame, users, stime):
detect_hmm = []
model = joblib.load(FPATH + "/model/hmm.pkl")
while(1):
date = stime.strftime("%Y-%m-%d")
for user in users:
hosts = np.unique(frame[(frame["user"] == user)].host.values)
for host in hosts:
udata = []
for _, data in frame[(frame["date"].str.contains(date)) & (frame["user"] == user) & (frame["host"] == host)].iterrows():
id = data["id"]
if id == 4776:
udata.append(0)
elif id == 4768:
udata.append(1)
elif id == 4769:
udata.append(2)
elif id == 4624:
udata.append(3)
elif id == 4625:
udata.append(4)
if len(udata) > 2:
data_decode = model.predict(np.array([np.array(udata)], dtype="int").T)
unique_data = np.unique(data_decode)
if unique_data.shape[0] == 2:
if user not in detect_hmm:
detect_hmm.append(user)
stime += datetime.timedelta(days=1)
if frame.loc[(frame["date"].str.contains(date))].empty:
break
return detect_hmm
# Learning Hidden Markov Model
def learnhmm(frame, users, stime):
lengths = []
data_array = np.array([])
# start_probability = np.array([0.52, 0.37, 0.11])
emission_probability = np.array([[0.09, 0.05, 0.35, 0.51],
[0.0003, 0.0004, 0.0003, 0.999],
[0.0003, 0.0004, 0.0003, 0.999]])
while(1):
date = stime.strftime("%Y-%m-%d")
for user in users:
hosts = np.unique(frame[(frame["user"] == user)].host.values)
for host in hosts:
udata = np.array([])
for _, data in frame[(frame["date"].str.contains(date)) & (frame["user"] == user) & (frame["host"] == host)].iterrows():
id = data["id"]
udata = np.append(udata, id)
# udata = udata[(udata*np.sign(abs(np.diff(np.concatenate(([0], udata)))))).nonzero()]
if udata.shape[0] > 2:
data_array = np.append(data_array, udata)
lengths.append(udata.shape[0])
stime += datetime.timedelta(days=1)
if frame.loc[(frame["date"].str.contains(date))].empty:
break
data_array[data_array == 4776] = 0
data_array[data_array == 4768] = 1
data_array[data_array == 4769] = 2
data_array[data_array == 4624] = 3
data_array[data_array == 4625] = 4
# model = hmm.GaussianHMM(n_components=3, covariance_type="full", n_iter=10000)
model = hmm.MultinomialHMM(n_components=3, n_iter=10000)
# model.startprob_ = start_probability
model.emissionprob_ = emission_probability
model.fit(np.array([data_array], dtype="int").T, lengths)
joblib.dump(model, FPATH + "/model/hmm.pkl")
# Post to Elastic Search cluster
def post_es(index, es, doc):
es.index(index=index, body=doc)
# Create mattings to Elastic Search
def create_map(es, index):
with open(FPATH + "/es-index/" + index + ".json", "r") as f:
body = f.read()
es.indices.create(index=index, body=body)
def to_lxml(record_xml):
rep_xml = record_xml.replace("xmlns=\"http://schemas.microsoft.com/win/2004/08/events/event\"", "")
fin_xml = rep_xml.encode("utf-8")
parser = etree.XMLParser(resolve_entities=False)
return etree.fromstring(fin_xml, parser)
def xml_records(filename):
if args.evtx:
with open(filename, "rb") as evtx:
parser = PyEvtxParser(evtx)
for record in parser.records():
try:
yield to_lxml(record["data"]), None
except etree.XMLSyntaxError as e:
yield record["data"], e
if args.xmls:
xdata = ""
with open(filename, 'r') as fx:
for line in fx:
xdata += line.replace("<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>", "").replace("</Events>", "").replace("<Events>", "")
# fixdata = xdata.replace("<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>", "")
xml_list = re.split("<Event xmlns=[\'\"]http://schemas.microsoft.com/win/2004/08/events/event[\'\"]>", xdata)
del xdata
for xml in xml_list:
if xml.startswith("<System>"):
try:
yield to_lxml("<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><Event>" + xml), None
except etree.XMLSyntaxError as e:
yield xml, e
# Parse the EVTX file
def parse_evtx(evtx_list):
cache_dir = os.path.join(FPATH, 'cache')
# Load cache files
if args.add and os.path.exists(cache_dir) and len(os.listdir(cache_dir)):
print("[+] Load cashe files.")
event_set = pd.read_pickle(os.path.join(cache_dir, "event_set.pkl"))
count_set = pd.read_pickle(os.path.join(cache_dir, "count_set.pkl"))
ml_frame = pd.read_pickle(os.path.join(cache_dir, "ml_frame.pkl"))
with open(os.path.join(cache_dir, "username_set.pkl"), "rb") as f:
username_set = pickle.load(f)
with open(os.path.join(cache_dir, "domain_set.pkl"), "rb") as f:
domain_set = pickle.load(f)
with open(os.path.join(cache_dir, "admins.pkl"), "rb") as f:
admins = pickle.load(f)
with open(os.path.join(cache_dir, "domains.pkl"), "rb") as f:
domains = pickle.load(f)
with open(os.path.join(cache_dir, "ntmlauth.pkl"), "rb") as f:
ntmlauth = pickle.load(f)
with open(os.path.join(cache_dir, "deletelog.pkl"), "rb") as f:
deletelog = pickle.load(f)
with open(os.path.join(cache_dir, "policylist.pkl"), "rb") as f:
policylist = pickle.load(f)
with open(os.path.join(cache_dir, "addusers.pkl"), "rb") as f:
addusers = pickle.load(f)
with open(os.path.join(cache_dir, "delusers.pkl"), "rb") as f:
delusers = pickle.load(f)
with open(os.path.join(cache_dir, "addgroups.pkl"), "rb") as f:
addgroups = pickle.load(f)
with open(os.path.join(cache_dir, "removegroups.pkl"), "rb") as f:
removegroups = pickle.load(f)
with open(os.path.join(cache_dir, "sids.pkl"), "rb") as f:
sids = pickle.load(f)
with open(os.path.join(cache_dir, "hosts.pkl"), "rb") as f:
hosts = pickle.load(f)
with open(os.path.join(cache_dir, "dcsync.pkl"), "rb") as f:
dcsync = pickle.load(f)
with open(os.path.join(cache_dir, "dcshadow.pkl"), "rb") as f:
dcshadow = pickle.load(f)
with open(os.path.join(cache_dir, "date.pkl"), "rb") as f:
starttime, endtime = pickle.load(f)
else:
event_set = pd.DataFrame(index=[], columns=["eventid", "ipaddress", "username", "logintype", "status", "authname", "date"])
count_set = pd.DataFrame(index=[], columns=["dates", "eventid", "username"])
ml_frame = pd.DataFrame(index=[], columns=["date", "user", "host", "id"])
username_set = []
domain_set = []
admins = []
domains = []
ntmlauth = []
deletelog = []
policylist = []
addusers = {}
delusers = {}
addgroups = {}
removegroups = {}
sids = {}
hosts = {}
dcsync = {}
dcshadow = {}
starttime = None
endtime = None
dcsync_count = {}
dcshadow_check = []
count = 0
record_sum = 0
if os.path.exists(cache_dir) is False:
os.mkdir(cache_dir)
print("[+] make cache folder {0}.".format(cache_dir))
if args.timezone:
try:
datetime.timezone(datetime.timedelta(hours=args.timezone))
tzone = args.timezone
print("[+] Time zone is {0}.".format(args.timezone))
except:
sys.exit("[!] Can't load time zone {0}.".format(args.timezone))
else:
tzone = 0
if args.fromdate:
try:
fdatetime = datetime.datetime.strptime(args.fromdate, "%Y-%m-%dT%H:%M:%S")
print("[+] Parse the EVTX from {0}.".format(fdatetime.strftime("%Y-%m-%d %H:%M:%S")))
except:
sys.exit("[!] From date does not match format '%Y-%m-%dT%H:%M:%S'.")
if args.todate:
try:
tdatetime = datetime.datetime.strptime(args.todate, "%Y-%m-%dT%H:%M:%S")
print("[+] Parse the EVTX from {0}.".format(tdatetime.strftime("%Y-%m-%d %H:%M:%S")))
except:
sys.exit("[!] To date does not match format '%Y-%m-%dT%H:%M:%S'.")
for evtx_file in evtx_list:
if args.evtx:
with open(evtx_file, "rb") as fb:
fb_data = fb.read(8)
if fb_data != EVTX_HEADER:
sys.exit("[!] This file is not EVTX format {0}.".format(evtx_file))
with open(evtx_file, "rb") as evtx:
parser = PyEvtxParser(evtx)
records = list(parser.records())
record_sum = len(records)
if args.xmls:
with open(evtx_file, "r") as fb:
fb_header = fb.read(6)
if "<?xml" not in fb_header:
sys.exit("[!] This file is not XML format {0}.".format(evtx_file))
for line in fb:
record_sum += line.count("<System>")
print("[+] Last record number is {0}.".format(record_sum))
# Parse Event log
print("[+] Start parsing the EVTX file.")
for evtx_file in evtx_list:
print("[+] Parse the EVTX file {0}.".format(evtx_file))
for node, err in xml_records(evtx_file):
if err is not None:
continue
count += 1
eventid = int(node.xpath("/Event/System/EventID")[0].text)
if not count % 100:
sys.stdout.write("\r[+] Now loading {0} records.".format(count))
sys.stdout.flush()
if eventid in EVENT_ID:
logtime = node.xpath("/Event/System/TimeCreated")[0].get("SystemTime")
try:
etime = datetime.datetime.strptime(logtime.split(".")[0], "%Y-%m-%d %H:%M:%S") + datetime.timedelta(hours=tzone)
except:
etime = datetime.datetime.strptime(logtime.split(".")[0], "%Y-%m-%dT%H:%M:%S") + datetime.timedelta(hours=tzone)
stime = datetime.datetime(*etime.timetuple()[:4])
if args.fromdate or args.todate:
if args.fromdate and fdatetime > etime:
continue
if args.todate and tdatetime < etime:
endtime = stime
break
if starttime is None:
starttime = stime
elif starttime > etime:
starttime = stime
if endtime is None:
endtime = stime
elif endtime < etime:
endtime = stime
event_data = node.xpath("/Event/EventData/Data")
logintype = 0
username = "-"
domain = "-"
ipaddress = "-"
hostname = "-"
status = "-"
sid = "-"
authname = "-"
###
# Detect admin users
# EventID 4672: Special privileges assigned to new logon
###
if eventid == 4672:
for data in event_data:
if data.get("Name") in "SubjectUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
if username not in admins and username != "-":
admins.append(username)
###
# Detect removed user account and added user account.
# EventID 4720: A user account was created
# EventID 4726: A user account was deleted
###
elif eventid in [4720, 4726]:
for data in event_data:
if data.get("Name") in "TargetUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
if eventid == 4720:
addusers[username] = etime.strftime("%Y-%m-%d %H:%M:%S")
else:
delusers[username] = etime.strftime("%Y-%m-%d %H:%M:%S")
###
# Detect Audit Policy Change
# EventID 4719: System audit policy was changed
###
elif eventid == 4719:
for data in event_data:
if data.get("Name") in "SubjectUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
if data.get("Name") in "CategoryId" and data.text is not None and re.search(r"\A%%\d{4}\Z", data.text):
category = data.text
if data.get("Name") in "SubcategoryGuid" and data.text is not None and re.search(r"\A{[\w\-]*}\Z", data.text):
guid = data.text
policylist.append([etime.strftime("%Y-%m-%d %H:%M:%S"), username, category, guid.lower(), int(stime.strftime("%s"))])
###
# Detect added users from specific group
# EventID 4728: A member was added to a security-enabled global group
# EventID 4732: A member was added to a security-enabled local group
# EventID 4756: A member was added to a security-enabled universal group
###
elif eventid in [4728, 4732, 4756]:
for data in event_data:
if data.get("Name") in "TargetUserName" and data.text is not None and not re.search(UCHECK, data.text):
groupname = data.text
elif data.get("Name") in "MemberSid" and data.text not in "-" and data.text is not None and re.search(r"\AS-[0-9\-]*\Z", data.text):
usid = data.text
addgroups[usid] = "AddGroup: " + groupname + "(" + etime.strftime("%Y-%m-%d %H:%M:%S") + ") "
###
# Detect removed users from specific group
# EventID 4729: A member was removed from a security-enabled global group
# EventID 4733: A member was removed from a security-enabled local group
# EventID 4757: A member was removed from a security-enabled universal group
###
elif eventid in [4729, 4733, 4757]:
for data in event_data:
if data.get("Name") in "TargetUserName" and data.text is not None and not re.search(UCHECK, data.text):
groupname = data.text
elif data.get("Name") in "MemberSid" and data.text not in "-" and data.text is not None and re.search(r"\AS-[0-9\-]*\Z", data.text):
usid = data.text
removegroups[usid] = "RemoveGroup: " + groupname + "(" + etime.strftime("%Y-%m-%d %H:%M:%S") + ") "
###
# Detect DCSync
# EventID 4662: An operation was performed on an object
###
elif eventid == 4662:
for data in event_data:
if data.get("Name") in "SubjectUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
dcsync_count[username] = dcsync_count.get(username, 0) + 1
if dcsync_count[username] == 3:
dcsync[username] = etime.strftime("%Y-%m-%d %H:%M:%S")
dcsync_count[username] = 0
###
# Detect DCShadow
# EventID 5137: A directory service object was created
# EventID 5141: A directory service object was deleted
###
elif eventid in [5137, 5141]:
for data in event_data:
if data.get("Name") in "SubjectUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
if etime.strftime("%Y-%m-%d %H:%M:%S") in dcshadow_check:
dcshadow[username] = etime.strftime("%Y-%m-%d %H:%M:%S")
else:
dcshadow_check.append(etime.strftime("%Y-%m-%d %H:%M:%S"))
###
# Parse logon logs
# EventID 4624: An account was successfully logged on
# EventID 4625: An account failed to log on
# EventID 4768: A Kerberos authentication ticket (TGT) was requested
# EventID 4769: A Kerberos service ticket was requested
# EventID 4776: The domain controller attempted to validate the credentials for an account
###
else:
for data in event_data:
# parse IP Address
if data.get("Name") in ["IpAddress", "Workstation"] and data.text is not None and (not re.search(HCHECK, data.text) or re.search(IPv4_PATTERN, data.text) or re.search(r"\A::ffff:\d+\.\d+\.\d+\.\d+\Z", data.text) or re.search(IPv6_PATTERN, data.text)):
ipaddress = data.text.split("@")[0]
ipaddress = ipaddress.lower().replace("::ffff:", "")
ipaddress = ipaddress.replace("\\", "")
# Parse hostname
if data.get("Name") == "WorkstationName" and data.text is not None and (not re.search(HCHECK, data.text) or re.search(IPv4_PATTERN, data.text) or re.search(r"\A::ffff:\d+\.\d+\.\d+\.\d+\Z", data.text) or re.search(IPv6_PATTERN, data.text)):
hostname = data.text.split("@")[0]
hostname = hostname.lower().replace("::ffff:", "")
hostname = hostname.replace("\\", "")
# Parse username
if data.get("Name") in "TargetUserName" and data.text is not None and not re.search(UCHECK, data.text):
username = data.text.split("@")[0]
if username[-1:] not in "$":
username = username.lower() + "@"
else:
username = "-"
# Parse targeted domain name
if data.get("Name") in "TargetDomainName" and data.text is not None and not re.search(HCHECK, data.text):