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Recent Posts

  • Physical Security Measures

    Physical Security Measures

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand the importance of physical security controls. Physical security access controls attempt to control entry and exits, and organizations commonly implement different controls at different boundaries Here’s …
  • Identifying Legitimate Access Point

    Identifying Legitimate Access Point

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand different types of wireless attacks. This includes several known attacks against wireless networks such as an access point placed within a network without official authorization. For example, …
  • Discovering Infected Systems

    Discovering Infected Systems

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand different malware types. Attackers install these onto systems using a variety of devious means. Infected systems give various symptoms, such as running slower, starting unknown processes, …
  • Understanding New Threats

    Understanding New Threats

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand new threats and new security trends. The single best protection against many attacks, such as social engineering, is to train and raise the security awareness of …
  • Personnel Security Awareness

    Personnel Security Awareness

    Personnel security awareness training helps mitigate risk and reduce security incidents. If you’re planning to take the SY0-501 version of the Security+ exam, you should understand the importance of training related to organizational security. See if you can answer this question? …
  • Identifying Critical Systems

    Identifying Critical Systems

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand business impact analysis concepts. It helps an organization identify critical systems and components that are essential to the organization’s success. For example, can you answer this …
  • Attacks Against Systems & Networks

    Attacks Against Systems & Networks

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand many common and advanced types of attacks launched against systems and networks. See if you can answer this sample practice test question. Q. While reviewing logs …
  • SY0-601 Differences

    SY0-601 Differences

    As I’m updating the CompTIA Security+ Get Certified Get Ahead: SY0-501 Study Guide, I’ve noticed that the SY0-601 is much more comprehensive. There’s a lot more for test takers to study and understand. I was wondering if I was just …
  • Protecting Data with Backups

    Protecting Data with Backups

    Backups are copies of data created to ensure that when the original data is lost or corrupted, it can be restored. If you’re planning to take the SY0-501 version of the Security+ exam, you should understand backup concepts in relation to …
  • Managing Data from Multiple Sources

    Managing Data from Multiple Sources

    If you’re planning to take the SY0-501 version of the Security+ exam, you should have a basic understanding of some specific tools used to assess networks and manage risks. This includes using a centralized solution for collecting, analyzing, and managing data …
  • Mobile Device Management

    Mobile Device Management

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand mobile device management concepts. This includes tools that help enforce security policies on mobile devices. They also include enforcing strong authentication methods to prevent unauthorized access. …
  • Detecting Trojans

    Detecting Trojans

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand the different types of malware such as Trojans. A Trojan appears to be one thing, such as pirated software or free antivirus software, but is something …
  • Comparing Embedded Systems

    Comparing Embedded Systems

    If you’re planning to take the SY0-501 version of the Security+ exam, you should have a basic understanding of the impact associated with different types of vulnerabilities. This includes the security implications of embedded systems that are now in printers, vehicles, …
  • Creating Secure Applications

    Creating Secure Applications

    If you’re planning to take the SY0-501 version of the Security+ exam, you should understand secure application development and deployment concepts. This includes common methods used to create secure applications such as development life-cycle models and using testing to ensure code …
  • Hi Ho

    Hi Ho

    During my high school days, I picked up a Kurt Vonnegut novel. I don’t remember which one (Slaughterhouse-Five maybe?), but I thoroughly enjoyed it and quickly finished it. Hi ho. I kept going back to the library, checking out another …

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Identifying Legitimate Access Point

Posted by on October 18 in Security+ | 0 comments

If you’re planning to take the SY0-501 version of the Security+ exam, you should understand different types of wireless attacks. This includes several known attacks against wireless networks such as an access point placed within a network without official authorization.

For example, can you answer this question?

Q. A coffee shop recently stopped broadcasting the SSID for their wireless network. Instead, paying customers can view it on their receipt and use it to connect to the coffee shop’s wireless network.  Today, Lisa turned on her laptop computer and saw the SSID. Which of the following is the MOST likely reason why?

A. Rogue AP

B. Evil attacker

C. Jamming

D. Bluejacking

More, do you know why the correct answer is correct and the incorrect answers are incorrect? The answer and explanation are available at the end of this post.

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Rogue AP

A rogue access point (rogue AP) is an AP placed within a network without official authorization. It might be an employee who is bypassing security or installed by an attacker. If an employee installs a rogue AP, the chances are higher that this AP will not be managed properly, increasing vulnerabilities to the network.

Generically, you can think of a rogue as a scoundrel, a crook, or a villain. Clearly, if a rogue is a crook or villain, then rogue access points are not an administrator’s friend. You might also see them called counterfeit access points, which is also a clear indication they aren’t legitimate.

Identifying Legitimate Access Point

Attackers may connect a rogue access point to network devices in wireless closets that lack adequate physical security. This access point acts as a sniffer to capture traffic passing through the wired network device, and then broadcasts the traffic using the wireless capability of the AP. The attacker can then capture the exfiltrated data files while sitting in the parking lot. Data exfiltration is the unauthorized transfer of data from an organization to a location controlled by an attacker.

Additionally, attackers may be able to use the rogue access point to connect into the wired network. This works the same way that regular users can connect to a wired network via a wireless network. The difference is that the attacker configures all the security for the counterfeit access point and can use it for malicious purposes.

If you discover an unauthorized AP, you should disconnect it as quickly as possible. A basic first step to take when you discover any attack is to contain or isolate the threat. By simply unplugging the Ethernet cable, you can stop the unauthorized AP from capturing network traffic.

CompTIA Security+ Study Guide

The 501 Version of the Study Guide

The CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide is an update to the top-selling SY0-201, SY0-301, and SY0-401 study guides, which have helped thousands of readers pass the exam the first time they took it.  It includes the same elements readers raved about in the previous three versions.

Each of the eleven chapters presents topics in an easy to understand manner and includes real-world examples of security principles in action.

You’ll understand the important and relevant security topics for the Security+ exam, without being overloaded with unnecessary details. Additionally, each chapter includes a comprehensive review section to help you focus on what’s important.



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If you plan to pursue any of the advanced security certifications, this guide will also help you lay a solid foundation of security knowledge. Learn this material, and you’ll be a step ahead for other exams. This SY0-501 study guide is for any IT or security professional interested in advancing in their field, and a must-read for anyone striving to master the basics of IT security.

Kindle edition also available.

Evil Twin

An evil twin is a rogue access point with the same SSID as a legitimate access point. For example, many public places such as coffee shops, hotels, and airports include free Wi-Fi as a service. An attacker can set up an AP using the same SSID as the public Wi-Fi network, and many unsuspecting users will connect to this evil twin.

Once a user connects to an evil twin, wireless traffic goes through the evil twin instead of the legitimate AP. Often, the attacker presents bogus logon pages to users to capture usernames and passwords. Other times, they simply capture traffic from the connection, such as email or text typed into web page text boxes, and analyze it to detect sensitive information they can exploit.

Although it might sound complex to set up an evil twin, it’s rather easy. Attackers can configure a laptop that has a wireless access card as an AP. With it running, the attackers look just like any other user in a coffee shop or airport waiting area. They’ll have their laptop open and appear to be working (just like you perhaps), and you’ll have no idea they are trying to steal your credentials or other personal data that you send over the Internet via the evil twin. Similarly, attackers can set one up in a parking lot or another location close to an organization and try to trick employees or visitors.

Often, administrators will use wireless scanners to perform site surveys. In addition to detecting noise on frequency bands, they can also detect rogue APs, including evil twins. The site survey can help them identify the physical location of access points because the signal will get stronger as the administrator gets closer.

Misconfigured Access Points

One of the primary reasons that wireless attacks are successful is because APs are misconfigured. For example, if an AP is not using WPA2 with AES and CCMP, it is susceptible to many attacks. Similarly, if WPS is enabled on an AP, a WPS attack can discover the PIN in a few hours simply by guessing. After it discovers the PIN, it can discover the passphrase.

Although your wireless router might be a little different, you’ll still be able to see many of the typical configuration settings.

Remember this

Rogue access points are often used to capture and exfiltrate data. An evil twin is a rogue access point using the same SSID as a legitimate access point. A secure AP blocks unauthorized users, but a rogue access point provides access to unauthorized users.


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CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide

  • Introduction
  • About the exam (including information on the number of questions, test duration, passing score, types of questions and more. Also includes a listing of the exam objectives)
  • 75 question pre-assessment exam
  • Mastering Security Basics (full content from Chapter 1 of the study guide including the exam topic review and 15 practice test questions)
  • Understanding Identity and Access Management (full content from Chapter 2 of the study guide including the exam topic review and 15 practice test questions)
  • Exploring Network Technologies and Tools (full content from Chapter 3 of the study guide including the exam topic review and 15 practice test questions)
  • Securing Your Network (full content from Chapter 4 of the study guide including the exam topic review and 15 practice test questions)
  • Securing Hosts and Data (full content from Chapter 5 of the study guide including the exam topic review and 15 practice test questions)
  • Comparing Threats, Vulnerabilities, and Common Attacks (full content from Chapter 6 of the study guide including the exam topic review and 15 practice test questions)
  • Protecting Against Advanced Attacks (full content from Chapter 7 of the study guide including the exam topic review and 15 practice test questions)
  • Using Risk Management Tools (full content from Chapter 8 of the study guide including the exam topic review and 15 practice test questions)
  • Implementing Controls to Protect Assets (full content from Chapter 9 of the study guide including the exam topic review and 15 practice test questions)
  • Understanding Cryptography and PKI (full content from Chapter 10 of the study guide including the exam topic review and 15 practice test questions)
  • Implementing Policies to Mitigate Risks (full content from Chapter 11 of the study guide including the exam topic review and 15 practice test questions)
  • 75 question post-assessment exam
  • Glossary

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Q. A coffee shop recently stopped broadcasting the SSID for their wireless network. Instead, paying customers can view it on their receipt and use it to connect to the coffee shop’s wireless network.  Today, Lisa turned on her laptop computer and saw the SSID. Which of the following is the MOST likely reason why?

A. Rogue AP

B. Evil attacker

C. Jamming

D. Bluejacking

Answer is A. This describes a rogue access point (AP). More specifically, it is an evil twin, which is a rogue AP with the same SSID as a legitimate access point.

While the person setting up the rogue AP may be evil, a CompTIA question won’t ask you to evaluate the character of an attacker.

Jamming typically prevents anyone from connecting to a wireless network.

Bluejacking is related to Bluetooth, not wireless networks.

See Chapter 4 of the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide for more information on wireless attacks.

CompTIA Security+ Get Certified Get Ahead: SY0-501 Study Guide

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