Arkitekturfor ny porteføljeav sikkerhetsverktøy · Arkitekturfor ny porteføljeav...

Arkitektur for nyportefølje avsikkerhetsverktøyIRT fagsamling, 20. november 2017

Arne Øslebø, arne.oslebo@uninett.no

27. November 2017 SLIDE 2

“We are drowning in information butstarved for knowledge.”

John Naisbitt

Basic requirements

Modular

Scalable

Full auditing

Access control

27. November 2017 SLIDE 3

Insert everything into Elastic Stack or Splunk?

27. November 2017 SLIDE 4

Commercial SIEM?

27. November 2017 SLIDE 5

ArcSight

LogRhythm

Splunk Enterprise Security

Open source SIEM?

27. November 2017 SLIDE 6

OSSIM

Apache Metron

27. November 2017 SLIDE 7

High level architecture

27. November 2017 SLIDE 8

Data transport: Apache NiFi

27. November 2017 SLIDE 9

Data transport: Apache MiNiFi

27. November 2017 SLIDE 10

Storage: Elasticsearch withSiren Plugin

27. November 2017 SLIDE 11

Vanguard Siren platform

Manual analysis: Kibi

27. November 2017 SLIDE 12

27. November 2017 SLIDE 13

Threat analysis/sharing: MISP

27. November 2017 SLIDE 14

Detailed architecture

27. November 2017 SLIDE 15

Siren platform

Wazuh

27. November 2017 SLIDE 16

Wazuh: rulebased

27. November 2017 SLIDE 17

<rule id="5700" level="0" noalert="1”><decoded_as>sshd</decoded_as><description>SSHD messages grouped.</description>

</rule>

<rule id="5710" level="5"><if_sid>5700</if_sid><match>illegal user|invalid user</match><description>sshd: Attempt to login using a non-

existent user</description></rule>

OpenSCAPOpenSCAP is a tool designed to check the security compliance and hardening of the systems using industry standard security baselines for enterprise environments.

Security Content Automation Protocol (SCAP)

�OVAL (Open Vulnerability Assessment Language)

�XCCDF (Extensible Configuration Checklist Description Format)

�ASR (Asset Reporting Format)

�CPE (Common Platform Enumeration)

�CVE (Common Vulnerabilities and Exposures)

�CWE (Common Weakness Enumeration)

Example: sudo chown root /etc/shadow

27. November 2017 SLIDE 18

Wazuh: Kibana AppGeneralOverview

27. November 2017 SLIDE 19

Wazuh: Kibana AppFile integrity

27. November 2017 SLIDE 20

Current status and future workAll components have been tested individually with limited data set

Working on setting up SiLK for production

Working on Wazuh

Full prototype

�Will start working on it soon

�Anonymized data in the beginning

�Real data when things are secured

• Small scale from selected sources• UNINETT CERT will use it every day for analysis

Production

�Late 2018?

27. November 2017 SLIDE 21

SiLKNetFlow/IPFIX tool

>50 commands

�Connected through pipes, named pipes or files

�Essential: Rwfilter, rwstats, rwcount, rwcut, rwsort, rwuniq

Flexiblearchitecture

27. November 2017 SLIDE 22

SiLK traffic types

27. November 2017 SLIDE 23

rwfilter

27. November 2017 SLIDE 24

Multiple rwfilter

27. November 2017 SLIDE 25

SiLK commands

27. November 2017 SLIDE 26

$ rwfilter --start-date=2017/11/17T11 --end-date=2017/11/17T12 --type=all --ip-version=6 --print-volume-statistics

| Recs| Packets| Bytes| Files|Total| 31227822| 733951870| 581778614555| 12| Pass| 2200839| 17778318| 13850680377| | Fail| 29026983| 716173552| 567927934178| |

$ rwfilter --start-date=2017/11/17T11 --end-date=2017/11/17T12 --sensors=oslo-gw7 --type=in --protocol=6 --packets=100- --pass=stdout --max-pass-records=5 | rwcut--fields=1-5

sIP| dIP|sPort|dPort|pro|78.83.x.y| 128.39.x.y| 56084|33896| 6| 78.83.x.y| 128.39.x.y |56084| 3308| 6| 78.83.x.y| 128.39.x.y |56084| 3483| 6| 78.83.x.y| 128.39.x.y |56084| 3344| 6| 91.247x.y| 128.39.x.y |45762| 911| 6|

SiLK commands (2)

27. November 2017 SLIDE 27

$ rwfilter --start-date=2017/11/17T11 --end-date=2017/11/17T12 --type=all --protocol=6 --pass=stdout | rwuniq --fields=sIP --values=Bytes,Packets,Flows,Distinct:dIP --flows=1000-

sIP| Bytes| Packets| Records|dIP-Distin| 13.33.x.y| 13028387| 29081| 6729| 81|

151.157.x.y| 8558322| 20683| 1490| 111| 40.101.x.y| 4038893| 7921| 1554| 51| 185.33.x.y| 4872539| 10564| 1195| 47| 37.252.x.y| 7671261| 14449| 1404| 52| 17.252.x.y| 1744592| 8616| 1058| 31|

Manual analysis: FlowViewer

27. November 2017 SLIDE 28

SilkWeb

27. November 2017 SLIDE 29

Automatic analysis: Analysis Pipeline

Processes flows in realtime

Simple but powerful scripting language

27. November 2017 SLIDE 30

Router stops sending data:

FILE_EVALUATION sensorOutageCHECK FILE_OUTAGE

SENSOR_LIST ALL SENSORSTIME_WINDOW 2 HOURS

END CHECKEND FILE_EVALUATION

Outbound SSH scan:FILTER Ssh

DPORT == 22END FILTER

EVALUATION SSHScanFILTER SshFOREACH SIPCHECK THRESHOLD

DISTINCT DIP > 20TIME_WINDOW 5 MINUTES

END CHECKALERT 1 TIMES 7 DAYSALERT TYPE OutboundSSHScanCLEAR ALWAYS

END EVALUATION

Analysis Pipeline Alerts

27. November 2017 SLIDE 31

{"@timestamp":"2017-11-16T13:24:05.135Z","_service":"certlogs","_token":"CSE1D7A0176X59CG","beat":{"hostname":"trd-col.cert.uninett.no","name":"trd-col.cert.uninett.no","version":"5.6.4"},"input_type":"log","message":"{\n\"envelope\": {\n \"generator\": \"org.cert.netsa.pipeline\",\n\"generator_version\": \"4.5.1\",\n \"severity\": 3,\n\"timestamp\": \"2017-11-16T13:23:58.837102Z\",\n\"analysis_tags\": [\"type:OutboundSSHScan\",\"analysis:SSHScan\"]\n},\n \"body\": {\n\"flow\": [{\"stime\": \"2017-11-16T13:22:44.744000Z\", \"elapsed\": 2.304, \"sip\": \"158.38.x.y\", \"dip\": \"158.39.x.y\", \"sport\": 60941, \"dport\": 22, \"proto\": 6, \"packets\": 32, \"bytes\": 5001, \"flags\": \"\", \"flags_initial\": \"\", \"sensor_name\": \"teknobyen-gw2\", \"flow_class\": \"all\", \"flow_type\": \"int2int\", \"application_id\": 0, \"icmp_type\": 0, \"icmp_code\": 0}],\n \"sip.cc\": [\"no\"],\n\"dip.cc\": [\"no\"],\n \"pipeline.unique.field\": [\"SIP\"],\n\"pipeline.unique.value\": [158.38.x.y],\n\"pipeline.metric.type\": [\"DISTINCT\"],\n\"pipeline.metric.fields\": [\"DIP\"],\n\"pipeline.metric.value\": [3]}\n}","offset":5068063,"source":"/data/pipeline/log/pipeline-20171116.log","type":"analysis_pipeline"}

Questions?

Arne Oslebo

arne.oslebo@uninett.no

27. November 2017 SLIDE 32