Nessus is a comprehensive vulnerability assessment tool that is widely used for conducting vulnerability assessments. It is known for its ability to generate detailed and easy-to-read reports, which makes it a preferred choice for security consultants who need to document their findings clearly.
Nessus scans for a wide range of vulnerabilities across different systems and applications. It provides a detailed report that includes the vulnerabilities found, their severity levels, and recommendations for remediation. This feature makes it ideal for security consultants who need to perform vulnerability assessments and present their findings to stakeholders in an understandable format.
References:
* Nessus product page: Tenable Nessus
* Use of Nessus in penetration testing reports: The reports generated by Nessus have been referenced in various HTB writeups such as those for Luke and Horizontall.

Credential harvesting is a type of attack that aims to collect usernames and passwords from unsuspecting users by tricking them into entering their credentials on a fake or spoofed website. Credential harvesting can be done by using phishing emails that lure users to click on malicious links or attachments that redirect them to the fake website. The fake website may look identical or similar to the legitimate one, but it will capture and store the user's credentials for later use by the attacker. In this case, the penetration tester set up a fake cloud mail login page and sent phishing emails to all company employees to harvest their credentials.

Netcat and cURL are tools that will help the tester prepare an attack for this scenario, as they can be used to establish a TCP connection, send payloads, and receive responses from the target web server. Netcat is a versatile tool that can create TCP or UDP connections and transfer data between hosts. cURL is a tool that can transfer data using various protocols, such as HTTP, FTP, SMTP, etc. The tester can use these tools to exploit the PHP script that executes shell commands with the value of the "item" variable.

A BLE (Bluetooth Low Energy) attack is specifically designed to exploit vulnerabilities in the Bluetooth Low Energy protocol, which is commonly used in modern wireless devices, including key fobs for electric vehicles.
This type of attack can allow a penetration tester to intercept, manipulate, or take control of the communication between the key fob and the vehicle. Bluejacking and Bluesnarfing are older Bluetooth attacks that are less effective against modern BLE implementations. WPS PIN attacks target Wi-Fi Protected Setup, which is unrelated to key fobs and electric vehicles.