Nessus — TryHackMe

Here I will learn how to set up and use Nessus, a popular vulnerability scanner.

Task 2 :Installation:

If you feel a problem in this paragraph you can read my article on the installation of Nessus in Linux.

Task 3: Navigation and Scans:

What is the name of the button which is used to launch a scan?

Answer: New Scan

Note:

What side menu option allows us to create custom templates?

Answer: Policies

Note:

Click on the Create new policies

What menu allows us to change plugin properties such as hiding them or changing their severity?

Answer: plugin rules

Note:

Now click on the “Create a new plugin rule” and create a new plugin.

In the ‘Scan Templates’ section after clicking on ‘New Scan’, what scan allows us to see simply what hosts are alive?

Answer: Host Discovery

Note:

One of the most useful scan types, which is considered to be ‘suitable for any host’?

Answer: Basic Network Scan

Note:

What scan allows you to ‘Authenticate to hosts and enumerate missing updates’?

Answer: Credential Patch Audit

What scan is specifically used for scanning Web Applications?

Answer: Web Application Tests

Note:

Task 4: Scanning!:

Create a new ‘Basic Network Scan’ targeting the deployed VM. What option can we set under ‘BASIC’ (on the left) to set a time for this scan to run? This can be very useful when network congestion is an issue.

Answer: Schedule

Note:

But remember if you are using free Nessus then off the Schedule before scanning otherwise no scan will happen

Under ‘DISCOVERY’ (on the left) set the ‘Scan Type’ to cover ports 1–65535. What is this type called?

Answer: Port Scan (all ports)

Note:

What ‘Scan Type’ can we change to under ‘ADVANCED’ for a lower bandwidth connection?

Answer: Scan low bandwidth links

Note:

Now press the Launch button. After that, it will show in the dashboard.

After the scan completes, which ‘Vulnerability’ in the ‘Port scanners’ family can we view the details of to see the open ports on this host?

Answer: Nessus SYN scanner

Note:

After the scan, finish click on the “dvwa” and enter there.

After entering the program.

Click on the blue line and see the list of the vulnerabilities.

What Apache HTTP Server Version is reported by Nessus?

Answer: 2.4.99

Note:

The version is 2.4.25. but the answer is not acceptable. The acceptable answer is 2.4.99. But I do not know why.

Task 5: Scanning a Web Application!:

What is the plugin id of the plugin that determines the HTTP server type and version?

Answer: 10107

Note:

Select the “New Scan” button from the dashboard.

Select the “Web Application Tests” option.

Inside the template.

Set up everything as the previous process done in Basic Network Scan.

The vulnerabilities list:

Click on the yellow marked column below.

Inside the yellow mark select the “HTTP Server Type and Version” option:

The plugin ID:

What authentication page is discovered by the scanner that transmits credentials in cleartext?

Answer: login.php

Note:

Select the option “HyperText Transfer Protocol (HTTP) Redirect Information”:

What is the file extension of the config backup?

Answer: .bak

Note:

Visit the “Backup Files Disclosure” option.

Inside the option.

Which directory contains example documents? (This will be in a php directory)

Answer: /external/phpids/0.6/docs/examples

Note:

Visit the yellow marked option below:

Visit the “HTTP Methods Allowed (per directory)” :

The example file path.

What vulnerability is this application susceptible to that is associated with X-Frame-Options?

Answer: Clickjacking

Note:

So, Happy learning happy journey.

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