Transcript COT2014_Threat_Intelligence

Cornerstones of Trust 2014
Threat Intelligence
with Open Source tools
@jaimeblasco
@santiagobassett
Presenters
JAIME BLASCO
SANTIAGO BASSETT
Director AlienVault Labs
Security Researcher
Malware Analyst
Incident Response
Security Engineer
OSSIM / OSSEC
Network Security
Logs Management
The attacker’s advantage
• They only need to be successful once
• Determined, skilled and often funded adversaries
• Custom malware, 0days, multiple attack vectors,
social engineering
• Persistent
The defender’s disadvantage
• They can’t make a mistake
• Understaffed, jack of all trades, underfunded
• Increasing complex IT infrastructure:
– Moving to the cloud
– Virtualization
– Bring your own device
• Prevention controls fail to block everything
• Hundreds of systems and vulnerabilities to
patch
What is Threat Intelligence?
• Information about malicious actors
• Helps you make better decisions about
defense
• Examples: IP addresses, Domains, URL’s, File
Hashes, TTP’s, victim’s industries, countries..
State of the art
• Most sharing is unstructured & human-tohuman
• Closed groups
• Actual standards require knowledge,
resources and time to integrate the data
How to use Threat Intelligence
• Detect what my prevention technologies fail
to block
• Security planning, threat assessment
• Improves incident response / Triage
• Decide which vulnerabilities should I patch
first
The Threat Intelligence Pyramid of
Pain
Standards & Tools
• IODEF: Incident Object Description Exchange
Format
• MITRE:
– STIX: Structured Threat Information eXpression
– TAXXII: Trusted Automated eXchange of Indicator
Information
– MAEC, CAPEC, CyBOX
• CIF: Collective Intelligence Framework
Collective Intelligence Framework
Collecting malware
Some malware tracking sites:
• http://malc0de.com/rss
• http://www.malwareblacklist.com/mbl.xml
• http://www.malwaredomainlist.com/hostslist/mdl.xml
• http://vxvault.siri-urz.net/URL_List.php
• http://urlquery.net
• http://support.clean-mx.de/clean-mx/xmlviruses.php
Some Open Source malware crawlers:
• Maltrieve: https://github.com/technoskald/maltrieve
• Ragpicker: https://code.google.com/p/malware-crawler/
Collecting malware
Other malware collection tools
Dionaea honeypot:
• http://dionaea.carnivore.it/
Thug Honeyclient – Drive by download attacks:
• https://github.com/buffer/thug
• Emulates browsers functionality (activeX
controls and plugins)
Analyzing malware
Yara: Flexible, human-readable rules for identifying
malicious streams.
Can be used to analyze:
• files
• memory (volatility)
• network streams.
private rule APT1_RARSilent_EXE_PDF {
meta:
author = "AlienVault Labs"
info = "CommentCrew-threat-apt1"
strings:
$winrar1 = "WINRAR.SFX" wide ascii
$winrar2 = ";The comment below contains SFX
script commands" wide ascii
$winrar3 = "Silent=1" wide ascii
$str1 = /Setup=[\s\w\"]+\.(exe|pdf|doc)/
$str2 = "Steup=\"" wide ascii
condition:
all of ($winrar*) and 1 of ($str*)
}
Analyzing malware
Cuckoo Sandbox: Used for automated malware
analysis.
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Traces Win32 API calls
Files created, deleted and downloaded
Memory dumps of malicious processes
Network traffic pcaps
Analyzing malware
Sandbox – CIF integration
In our example: hxxp://www.garyhart.com, domain
CIF External feed example
Thank you!!
@jaimeblascob
@santiagobassett