Hacking For Dummies

Hacking For Dummies
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Learn to think like a hacker to secure your own systems and data Your smartphone, laptop, and desktop computer are more important to your life and business than ever before. On top of making your life easier and more productive, they hold sensitive information that should remain private. Luckily for all of us, anyone can learn powerful data privacy and security techniques to keep the bad guys on the outside where they belong. Hacking For Dummies takes you on an easy-to-follow cybersecurity voyage that will teach you the essentials of vulnerability and penetration testing so that you can find the holes in your network before the bad guys exploit them. You will learn to secure your Wi-Fi networks, lock down your latest Windows 11 installation, understand the security implications of remote work, and much more. You’ll find out how to: Stay on top of the latest security weaknesses that could affect your business’s security setup Use freely available testing tools to “penetration test” your network’s security Use ongoing security checkups to continually ensure that your data is safe from hackers Perfect for small business owners, IT and security professionals, and employees who work remotely, Hacking For Dummies is a must-have resource for anyone who wants to keep their data safe.

Оглавление

Kevin Beaver. Hacking For Dummies

Hacking For Dummies® To view this book's Cheat Sheet, simply go to www.dummies.com and search for “Hacking For Dummies Cheat Sheet” in the Search box. Table of Contents

List of Tables

List of Illustrations

Guide

Pages

Introduction

About This Book

Foolish Assumptions

Icons Used in This Book

Beyond the Book

Where to Go from Here

Building the Foundation for Security Testing

Introduction to Vulnerability and Penetration Testing

Straightening Out the Terminology

Hacker

Malicious user

Recognizing How Malicious Attackers Beget Ethical Hackers

SECURITY TESTING CERTIFICATIONS

Vulnerability and penetration testing versus auditing

Policy considerations

Compliance and regulatory concerns

Understanding the Need to Hack Your Own Systems

Understanding the Dangers Your Systems Face

Nontechnical attacks

Network infrastructure attacks

Operating system attacks

Application and other specialized attacks

Following the Security Assessment Principles

Working ethically

Respecting privacy

Not crashing your systems

Using the Vulnerability and Penetration Testing Process

Formulating your plan

Selecting tools

Executing the plan

Evaluating results

Moving on

Cracking the Hacker Mindset

What You’re Up Against

THINKING LIKE THE BAD GUYS

Who Breaks into Computer Systems

Hacker skill levels

Hacker motivations

Why They Do It

HACKING IN THE NAME OF LIBERTY?

Planning and Performing Attacks

HACKING MAGAZINES

Maintaining Anonymity

Developing Your Security Testing Plan

Establishing Your Goals

DO YOU NEED INSURANCE?

Determining Which Systems to Test

ATTACK-TREE ANALYSIS

Creating Testing Standards

Timing your tests

Running specific tests

A CASE STUDY IN SELF-INFLICTED DENIAL OF SERVICE

Conducting blind versus knowledge assessments

Picking your location

Responding to vulnerabilities you find

Making silly assumptions

Selecting Security Assessment Tools

Hacking Methodology

Setting the Stage for Testing

Seeing What Others See

Scanning Systems

Hosts

Open ports

Determining What’s Running on Open Ports

Assessing Vulnerabilities

Penetrating the System

Putting Security Testing in Motion

Information Gathering

Gathering Public Information

Social media

Web search

Web crawling

Websites

Mapping the Network

WHOIS

Privacy policies

Social Engineering

Introducing Social Engineering

Starting Your Social Engineering Tests

Knowing Why Attackers Use Social Engineering

Understanding the Implications

Building trust

Exploiting the relationship

Deceit through words and actions

Deceit through technology

Performing Social Engineering Attacks

Determining a goal

Seeking information

Using the Internet

Dumpster diving

Phone systems

Phishing emails

Social Engineering Countermeasures

Policies

User awareness and training

Physical Security

Identifying Basic Physical Security Vulnerabilities

Pinpointing Physical Vulnerabilities in Your Office

Building infrastructure

Attack points

Countermeasures

Utilities

Attack points

Countermeasures

Office layout and use

Attack points

Countermeasures

Network components and computers

Attack points

Countermeasures

Passwords

Understanding Password Vulnerabilities

Organizational password vulnerabilities

Technical password vulnerabilities

Cracking Passwords

Cracking passwords the old-fashioned way

Social engineering

TECHNIQUES

COUNTERMEASURES

Shoulder surfing

TECHNIQUES

COUNTERMEASURES

Inference

Weak authentication

BYPASSING AUTHENTICATION

COUNTERMEASURES

Cracking passwords with high-tech tools

Password-cracking software

Dictionary attacks

KNOW WHERE YOUR PASSWORDS LIE

Brute-force attacks

Rainbow attacks

Cracking Windows passwords with pwdump3 and John the Ripper

Cracking Unix/Linux passwords with John the Ripper

PASSWORDS BY THE NUMBERS

Cracking password-protected files

Cracking files

Countermeasures

Understanding other ways to crack passwords

Keystroke logging

LOGGING TOOLS

COUNTERMEASURES

Weak password storage

SEARCHING

COUNTERMEASURES

Network analyzer

TESTING

COUNTERMEASURES

Weak BIOS passwords

Weak passwords in limbo

WEAKNESSES

COUNTERMEASURES

General Password Cracking Countermeasures

Storing passwords

Creating password policies

Taking other countermeasures

THE FALLACY OF MULTIFACTOR AUTHENTICATION

Securing Operating Systems

Windows

Linux and Unix

Hacking Network Hosts

Network Infrastructure Systems

Understanding Network Infrastructure Vulnerabilities

Choosing Tools

Scanners and analyzers

Vulnerability assessment

Scanning, Poking, and Prodding the Network

Scanning ports

Ping sweeping

Using port scanning tools

NMAP

NetScanTools Pro

Countermeasures against ping sweeping and port scanning

Scanning SNMP

Vulnerabilities

Countermeasures against SNMP attacks

Grabbing banners

Telnet

Countermeasures against banner-grabbing attacks

Testing firewall rules

Testing

NETCAT

RULEBASE ANALYZERS

Countermeasures against firewall rulebase vulnerabilities

Analyzing network data

Network analyzer programs

Countermeasures against network protocol vulnerabilities

PHYSICAL SECURITY

NETWORK ANALYZER DETECTION

The MAC-daddy attack

ARP spoofing

Using Cain & Abel for ARP poisoning

MAC address spoofing

LINUX-BASED SYSTEMS

WINDOWS

Countermeasures against ARP poisoning and MAC address Spoofing attacks

Testing denial of service attacks

WHAT YOU NEED TO KNOW ABOUT ADVANCED MALWARE

DoS attacks

Testing

DEMONSTRATE EXPLOITS WHEN NEEDED

Countermeasures against DoS attacks

Detecting Common Router, Switch, and Firewall Weaknesses

Finding unsecured interfaces

Uncovering issues with SSL and TLS

Putting Up General Network Defenses

Wireless Networks

Understanding the Implications of Wireless Network Vulnerabilities

Choosing Your Tools

Discovering Wireless Networks

Checking for worldwide recognition

Scanning your local airwaves

Discovering Wireless Network Attacks and Taking Countermeasures

DON’T OVERLOOK BLUETOOTH

Encrypted traffic

Countermeasures against encrypted traffic attacks

Wi-Fi Protected Setup

Countermeasures against the WPS PIN flaw

Rogue wireless devices

Countermeasures against rogue wireless devices

MAC spoofing

Countermeasures against MAC spoofing

Physical security problems

Countermeasures against physical security problems

Vulnerable wireless workstations

Countermeasures against vulnerable wireless workstations

Default configuration settings

Countermeasures against default configuration settings exploits

Mobile Devices

Sizing Up Mobile Vulnerabilities

Cracking Laptop Passwords

Choosing your tools

Applying countermeasures

THE FALLACY OF FULL-DISK ENCRYPTION

Cracking Phones and Tablets

Cracking iOS passwords

Taking countermeasures against password cracking

HACKING THE INTERNET OF THINGS

Hacking Operating Systems

Windows

Introducing Windows Vulnerabilities

Choosing Tools

Free Microsoft tools

All-in-one assessment tools

Task-specific tools

Gathering Information About Your Windows Vulnerabilities

System scanning

Testing

Countermeasures against system scanning

NetBIOS

Hacks

UNAUTHENTICATED ENUMERATION

SHARES

Countermeasures against NetBIOS attacks

Detecting Null Sessions

Mapping

Gleaning information

net view

Configuration and user information

Countermeasures against null-session hacks

Checking Share Permissions

Windows defaults

Windows 2000/NT

Windows XP and later

Testing

Exploiting Missing Patches

Using Metasploit

WINDOWS 11 SECURITY

Countermeasures against missing patch vulnerability exploits

Running Authenticated Scans

Linux and macOS

Understanding Linux Vulnerabilities

Choosing Tools

Gathering Information About Your System Vulnerabilities

System scanning

Countermeasures against system scanning

Finding Unneeded and Unsecured Services

Searches

Vulnerabilities

Tools

Countermeasures against attacks on unneeded services

Disabling unneeded services

INETD.CONF (OR XINETD.CONF)

CHKCONFIG

Access control

Securing the .rhosts and hosts.equiv Files

Hacks using the hosts.equiv and .rhosts files

hosts.equiv

.rhosts

Countermeasures against .rhosts and hosts.equiv file attacks

Disabling commands

Blocking access

Assessing the Security of NFS

NFS hacks

Countermeasures against NFS attacks

Checking File Permissions

File permission hacks

Countermeasures against file permission attacks

Manual testing

Automatic testing

Finding Buffer Overflow Vulnerabilities

Attacks

Countermeasures against buffer overflow attacks

Checking Physical Security

Physical security hacks

Countermeasures against physical security attacks

Performing General Security Tests

Patching

Distribution updates

Multiplatform update managers

Hacking Applications

Communication and Messaging Systems

Introducing Messaging System Vulnerabilities

Recognizing and Countering Email Attacks

Email bombs

Attachments

ATTACKS USING EMAIL ATTACHMENTS

COUNTERMEASURES AGAINST EMAIL ATTACHMENT ATTACKS

Connections

ATTACKS USING FLOODS OF EMAILS

COUNTERMEASURES AGAINST CONNECTION ATTACKS

Automated email security controls

Banners

Gathering information

Countermeasures against banner attacks

SMTP attacks

Account enumeration

ATTACKS USING ACCOUNT ENUMERATION

COUNTERMEASURES AGAINST ACCOUNT ENUMERATION

Relay

AUTOMATIC TESTING

MANUAL TESTING

COUNTERMEASURES AGAINST SMTP RELAY ATTACKS

Email header disclosures

TESTING

COUNTERMEASURES AGAINST HEADER DISCLOSURES

Capturing traffic

Malware

General best practices for minimizing email security risks

Software solutions

Operating guidelines

Understanding VoIP

VoIP vulnerabilities

Scanning for vulnerabilities

Capturing and recording voice traffic

Countermeasures against VoIP vulnerabilities

Web Applications and Mobile Apps

Choosing Your Web Security Testing Tools

Seeking Out Web Vulnerabilities

Directory traversal

MANUAL ANALYSIS REQUIRED!

Crawlers

Google

Countermeasures against directory traversals

Input-filtering attacks

Buffer overflows

URL manipulation

Hidden field manipulation

Code injection and SQL injection

Cross-site scripting

Countermeasures against input attacks

SENSITIVE INFORMATION STORED LOCALLY

Default script attacks

Countermeasures against default script attacks

Unsecured login mechanisms

Countermeasures against unsecured login systems

Performing general security scans for web application vulnerabilities

TESTING MODERN WEB APPLICATIONS

Minimizing Web Security Risks

Practicing security by obscurity

Putting up firewalls

Analyzing source code

Uncovering Mobile App Flaws

Databases and Storage Systems

Diving Into Databases

Choosing tools

Finding databases on the network

Cracking database passwords

Scanning databases for vulnerabilities

Following Best Practices for Minimizing Database Security Risks

Opening Up About Storage Systems

Choosing tools

Finding storage systems on the network

Rooting out sensitive text in network files

Following Best Practices for Minimizing Storage Security Risks

Security Testing Aftermath

Reporting Your Results

Pulling the Results Together

Prioritizing Vulnerabilities

Creating Reports

Plugging Your Security Holes

Turning Your Reports into Action

Patching for Perfection

Patch management

Patch automation

Commercial tools

Free tools

Hardening Your Systems

PAYING THE PIPER

Assessing Your Security Infrastructure

Managing Security Processes

Automating the Security Assessment Process

Monitoring Malicious Use

Outsourcing Security Assessments

THINKING ABOUT HIRING A REFORMED HACKER?

Instilling a Security-Aware Mindset

Keeping Up with Other Security Efforts

The Part of Tens

Ten Tips for Getting Security Buy-In

Cultivate an Ally and a Sponsor

Don’t Be a FUDdy-Duddy

Demonstrate That the Organization Can’t Afford to Be Hacked

Outline the General Benefits of Security Testing

Show How Security Testing Specifically Helps the Organization

Get Involved in the Business

Establish Your Credibility

Speak on Management’s Level

Show Value in Your Efforts

Be Flexible and Adaptable

Ten Reasons Hacking Is the Only Effective Way to Test

The Bad Guys Think Bad Thoughts, Use Good Tools, and Develop New Methods

IT Governance and Compliance Are More Than High-Level Audits

Vulnerability and Penetration Testing Complements Audits and Security Evaluations

Customers and Partners Will Ask How Secure Your Systems Are

The Law of Averages Works Against Businesses

Security Assessments Improve Understanding of Business Threats

If a Breach Occurs, You Have Something to Fall Back On

In-Depth Testing Brings Out the Worst in Your Systems

Combined Vulnerability and Penetration Testing Is What You Need

Proper Testing Can Uncover Overlooked Weaknesses

Ten Deadly Mistakes

Not Getting Approval

Assuming That You Can Find All Vulnerabilities

Assuming That You Can Eliminate All Vulnerabilities

Performing Tests Only Once

Thinking That You Know It All

Running Your Tests Without Looking at Things from a Hacker’s Viewpoint

Not Testing the Right Systems

Not Using the Right Tools

Pounding Production Systems at the Wrong Time

Outsourcing Testing and Not Staying Involved

Tools and Resources

Bluetooth

Certifications

Databases

Denial of Service (DoS) Protection

Exploits

Firewall Rulebase Analyzers

General Research and OSINT Tools

Hacker and Security Testing Publications

Internet of Things

Keyloggers

Laws and Regulations

Linux

Live Toolkits

Log Analysis

Messaging

Miscellaneous

Mobile

Networks

Password Cracking

Patch Management

Security Education and Learning Resources

Security Frameworks

Security Reports and Statistics

Social Engineering and Phishing

Source Code Analysis

Storage

User Awareness and Training

Voice over Internet Protocol

Vulnerability Databases

Websites and Applications

Windows

Wireless Networks

Index. A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

About the Author

Dedication

Author’s Acknowledgments

WILEY END USER LICENSE AGREEMENT

Отрывок из книги

Welcome to Hacking For Dummies, 7th Edition. This book outlines — in plain English — computer hacking tricks and techniques that you can use to assess the security of your information systems, find the vulnerabilities that matter, and fix the weaknesses before criminal hackers and malicious insiders take advantage of them. This hacking is the professional, aboveboard, and legal type of security testing — which I refer to as vulnerability and penetration testing or ethical hacking throughout the book.

Computer and network security is a complex subject and an ever-moving target. You must stay on top of it to ensure that your information is protected from the bad guys and their exploits, including the growing challenges associated with ransomware. The techniques and tools outlined in this book can help.

.....

Vulnerabilities and attacks have grown enormously in recent years because of virtualization, cloud computing, and even social media. These three things alone add immeasurable complexity to your environment. On top of that, with the new ways of the world and so many people working from home, the complexities have grown exponentially.

Exploits that involve manipulating people — your users and even you — are often the greatest vulnerability. Humans are trusting by nature, which can lead to social engineering exploits. Social engineering is exploiting the trusting nature of human beings to gain information — often via email phishing — for malicious purposes. With dramatic increases in the size of the remote workforce, social engineering has become an even greater threat, especially with more personal devices being used that are likely much less secure. Check out Chapter 6 for more information about social engineering and how to guard your systems and users against it.

.....

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