IT Security:

Threats, Vulnerabilities
and Countermeasures

REYNOLD G. BUSTILLO, D.I.T.

New Cyber Security World

 New threats
 New tools and services to protect
 New organization to manage
 Better results under worse conditions

 cyber crime impact

 Better audit results

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Introduction to Cyber Crime
 Cyber crime and terrorism has escalated
during recent years
 It is well-organized
 It is advanced technically
 It is well-financed
 It has adopted a new view
 The old view: quick entry and exit
 The new view: hidden long term presence
 The best attack is undetected, and undetectable

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Why the Increase In Cyber Intelligence
 Recent open source network compromises
disclosure, becoming more common, used as a
nation enabler
 Easier to steal digits, than to integrate a spy
 Larger ROI in stealing R&D, vice actually doing it.
(Past events have shown that .EDU has been used
as a gateway to .GOV)

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Why the Increase In Cyber Intelligence

 Economic motivation
 Globalization empowerment
 Continuous national interest into US
directions and intentions
 If you can’t out shoot them out spend
them. (costly to recover form breaches)

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Incident Trends
Events per Day Investigated Events per Day

1000000

100000 Findings per Day Confirmed Incidents per Day

3.5

10000 3
2.5
2
1000 1.5
1

100 0.5
0
2002 2003 2004 2005 2006 2007

10

1
2002 2003 2004 2005 2006 2007

Typical Civil Agency Cyber Levels of Interest / Activities

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Previous Defense Strategy
 Blocked known attack patterns
 Blocked known infiltration methods
 Used best tools available in 1998
Intel
Collection
Nation-State
Actions
Cyber
Terrorists
Parasitic Awareness is key
Hackers

Malicious Friendly
Code Forces

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Government Response: A New Cyber Initiative

 Security measures are essential and urgent in the face of stronger criminals and
nations
 The P Government Response: A New Cyber Initiative resident issued directives, on
January 8, 2008, that we strengthen our defenses
 National Security Directive 54 and Homeland Security Directive 23
 Collectively, the cyber initiative is to secure the government's computer systems against
attacks by foreign adversaries and other intruders
 OMB has mandated all agencies will have a Trusted Internet Connection (TIC)
 A national multi-part defense against cyber crime
 Department of Education is part of the defense
 First combination of separate federal security areas
 National defense and intelligence
 Sensitive civilian information
 Two major goals in this cyber initiative:
 One: stop critical vulnerabilities now in each agency
 Two: extend protection from global predators by cross-agency cooperation

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 Threat Summary
 Exfiltration of US sensitive data from local networks and systems
committed by hostile countries and organizations increasing

 FBI Report to Congress: Terrorist cell used stolen PII/ SI to

conduct much of their business

 Increased cases of a critical nature against critical networks

identified by the US CERT

 In FY 2009, events detected will continue to rise

 Stronger awareness and countermeasures will be required to

protect against future threats

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 Security Vulnerabilities

Know your vulnerabilities

• OWASP
(http://www.owasp.org)

• National Vulnerability Database

(http://nvd.nist.gov)
• SANS Top 20
(www.sans.org/top20)
• Others
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 OWASP Top 10 Security Vulnerabilities
 1 - Cross Site Scripting (XSS) XSS flaws occur whenever an application takes user supplied data and sends it to a web browser without first
validating or encoding that content. XSS allows attackers to execute script in the victim's browser which can hijack user sessions, deface web
sites, possibly introduce worms, etc.

 2 - Injection Flaws Injection flaws, particularly SQL injection, are common in web applications. Injection occurs when user-supplied data is sent
to an interpreter as part of a command or query. The attacker's hostile data tricks the interpreter into executing unintended commands or
changing data.

 3 - Malicious File Execution Code vulnerable to remote file inclusion (RFI) allows attackers to include hostile code and data, resulting in
devastating attacks, such as total server compromise. Malicious file execution attacks affect PHP, XML and any framework which accepts
filenames or files from users.

 4 - Insecure Direct Object Reference A direct object reference occurs when a developer exposes a reference to an internal implementation
object, such as a file, directory, database record, or key, as a URL or form parameter. Attackers can manipulate those references to access other
objects without authorization.

 5 - Cross Site Request Forgery (CSRF) A CSRF attack forces a logged-on victim's browser to send a pre-authenticated request to a vulnerable
web application, which then forces the victim's browser to perform a hostile action to the benefit of the attacker. CSRF can be as powerful as
the web application that it attacks.

 6 - Information Leakage and Improper Error Handling Applications can unintentionally leak information about their configuration, internal
workings, or violate privacy through a variety of application problems. Attackers use this weakness to steal sensitive data, or conduct more
serious attacks.

 7 - Broken Authentication and Session Management Account credentials and session tokens are often not properly protected. Attackers
compromise passwords, keys, or authentication tokens to assume other users' identities.

 8 - Insecure Cryptographic Storage Web applications rarely use cryptographic functions properly to protect data and credentials. Attackers use
weakly protected data to conduct identity theft and other crimes, such as credit card fraud.

 9 - Insecure Communications Applications frequently fail to encrypt network traffic when it is necessary to protect sensitive communications.

 10 - Failure to Restrict URL Access Frequently, an application only protects sensitive functionality by preventing the display of links or URLs to
unauthorized users. Attackers can use this weakness to access and perform unauthorized operations by accessing those URLs directly.

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OWASP Top 1: Cross Site Scripting
 What is Cross Site Scripting?
 In it’s simplest form, it’s a process that can occur anywhere a web application
uses input from a malicious user to generate output without validating or
encoding the input.
 During a Cross Site Scripting attack, a malicious source sends a script that is
executed by the end user’s browser. It allows attackers to embed code from
one webpage into another webpage by changing its HTML code .
 It’s been used to deface web sites, conduct phishing attacks, or it can take over
a user’s browser and force them to execute commands they’re unaware of .
 Cross Site Scripting attacks usually come in the form of JavaScript however,
any active content poses a potential danger.
 Prevention
 Validate the users input against what is expected
 Encode user supplied output
 After you believe you’ve done the right things during code development,
inspect your code with a scan. 12
OWASP Top 2: Injection Flaws (SQL Injection)
 What is SQL Injection
 SQL injection is the actual injection of SQL commands into web
applications through user input fields.

 When an application uses internal SQL commands and you also have user
input capabilities (like a login screen), SQL commands can be injected that
can create, read, update, or delete any data available to the application.

 Prevention

 You can put tight constraints on user inputs. But the best method of
preventing SQL injection is to avoid the use of dynamically generated SQL
in your code. Instead use stored or canned procedures.
 And then again, run a scan to make sure your application is not vulnerable
to SQL injections.

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OWASP Top 3: Malicious File
Execution
 What is Malicious File Execution
 When Developers program applications to use input files provided by the
user and the bad guy is the one entering the file, a malicious file is executed
unknowingly, thus we have malicious file execution.

 Malicious file execution attacks can occur anytime the application accepts
filenames or files from a users.

 When these files are executed, they can be used to do just about anything
from stealing data to taking over the entire system.

 Prevention

 Strongly validate user input using "accept known good" as a strategy, or

isolate incoming files and check them legitimacy before executing them.
 Disable certain PHP commands: I suggest that you visit the OWASP website
to see what commands to disable.
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OWASP Vulnerabilities: A Common Thread
From looking at OWASP vulnerabilities
it appears that there is a common
theme. Applications with Dynamic
code or user inputs have the most
vulnerabilities – and that seems to be
the current trend in application
development.
So if you’re building applications of
that nature, make sure you test them
carefully.

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SANS Top 20 Security Vulnerabilities

 Information goes here

 2nd level info
 2nd level cont’d
 Information goes here
 Information goes here

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National Vulnerability Database

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National Vulnerability Database

In the near future, information

warfare will control the form and
future of war... Our sights must
not be fixed on the fire-power of
the industrial age; rather, they
must be trained on the
information warfare of the
information age.

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National Vulnerability Database

In the near future, information

warfare will control the form and
future of war... Our sights must
not be fixed on the fire-power of
the industrial age; rather, they
must be trained on the
information warfare of the
information age.

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Other Vulnerabilities
 Code Mistakes

 Untrained Users

 Insecure Configuration Settings

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Code Mistakes
Federal Student Aid has had Code
Mistakes
 Implement Prevention in Code
 Thoroughly Test
 Use Tools

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Untrained Users
 Security ignorance compromises data
 Provide the training
 Rules of Behavior
 Annual refresher training

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Insecure Configuration Settings
NIST, DISA, CIS vs. Business Needs
Builds
System Upgrades
Vulnerability Scans

 Note: Federal Student Aid Secure Configuration Guides are based off
the NIST checklist located at http://checklists.nist.gov

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 Items of Special Interest
 Keyloggers & WSNPOEM

 What are these threats and why are they of

Special Interest to Federal Student Aid and
learning institutions?
 What can be done to mitigate these
threats?

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Item of Special Interest: Keyloggers

 What’s
a Keylogger and how does it exploit a
Web Application?
 Downloaded unknowingly
 Resident on Personal Computers
 Captures User Activity
 Usually part of a malicious Network or BOTNET
 Education notified of compromises by US-CERT

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Keylogger Mitigations
 Train users
 Implement effective Anti-Spyware, Anti-Virus
 Keep patches and versions current
 Firewall
 Automatic form filler programs
 Cut and paste
 One-time passwords
 Smartcards
 Virtual keyboards

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Virtual Keyboard
A virtual keyboard is provided on Federal Student Aid’s Enterprise Security login page
and does not require end users to acquire additional software.

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 Virtual Keyboard
 Some of the features of Federal Student Aid’s Virtual Keyboard Include:

 Highly effective in evading true “Key Logging”

 Widely used by many financial institutions
 Low cost technology to deploy (even for 50 million users)
 Does not require any new hardware or software on client machines
 Can work in conjunction with the existing keyboard
 Keys can be entered by mouse click or by leaving mouse on the key
for 2 seconds
 Virtual keyboard randomly shifts on the screen

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 Item of Special Interest: WSNPOEM
 WSNPOEM
 What is it?
 Variant of the Banker/InfoStealer/Bancos/Zbot family (identified as
PWS-Banker.gen.bw by McAfee, as Infostealer.Banker.C by
Symantec, as Trojan-Spy.Win32.Bancos.aam by Kaspersky and as
Mal/Zbot-A by Sophos).

 How does it exploit a Web Application?

 WinInet interception
 In-process key-logging

 How do we know about it and what’s the impact?

 What can be done?

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 Item of Special Interest WSNPOEM
 How do we know about it:
 Since 2004 we have been receiving periodic files from US-CERT
 Now provided weekly
 Government wide concern

 Impact:
 > 22,000 unique compromised SSNs
 > 300 unique compromised userids and passwords
 Analysis from the raw logs has identified wsnpoem as the
number one threat

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Item of Special Interest: WSNPOEM
Malware Occurances
wsnpoem_v2 296475
wsnpoem_v3 394
 The wsnpoem malware &
wsnpoem_v6 15643 variants make up 95% of
wsnpoem_v4 3447 the incidents captured in
wsnpoem 5019 the US-CERT files
haxdoor 4888
nethelper 4025
win32agent 3412
fireming 3063
silentbanker_v2 1583
passsickle 264
manda 259
nowhere 217
win32agent_v4 39
urlzone 6

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Item of Special Interest: WSNPOEM
 What can be done at the application side?
 Require two factor authentication
 Virtual Keyboards, URL encoding, header encryption, shared keys,
security questions, and images are all vulnerable to this type of attack
 Training and awareness for client side prevention
 Train those that are accessible
 Broadcast messages or post warnings on websites

 What can be done at the client side?

 Use two factor authentication
 Keep patches and versions current
 Run reputable security software scans (in safe mode)

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Item of Special Interest: FSA Actions

 Revoke User Access

 Notify User / School
 Review Logs
 Assist User / School Clean Computer

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 How Much Security is Enough?
 We implement security based on Cost
vs. Risk
 Threat * Vulnerability = Risk
 Cost of Implementing Controls – Cost of not Implementing Controls = Cost

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Questions?

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