Complete SY0-601 CompTIA Materials

TLS (Transport Layer Security) is a cryptographic protocol that provides secure communication over the internet. It can protect the data transmitted between the website and the visitors from eavesdropping, tampering, etc. It is the most secure protocol to implement for a website that sells products online using a credit card.

Network and firewall logs should be analyzed to identify the impacted host in a cybersecurity incident involving a command-and-control server. A command-and-control server is a central server that communicates with and controls malware-infected devices or bots. A command-and-control server can send commands to the bots, such as downloading additional malware, stealing data, or launching attacks. Network logs can help to identify any suspicious or anomalous network traffic, such as connections to unknown or malicious domains, high-volume data transfers, or unusual protocols or ports. Firewall logs can help to identify any blocked or allowed traffic based on the firewall rules, such as connections to or from the command-and-control server, or any attempts to bypass the firewall. References:

• https://cybersecurity.att.com/blogs/security-essentials/command-and-control-server-detection-methods-best-practices
• https://www.howtogeek.com/726136/what-is-a-command-and-control-server-for-malware/

Least privilege is a security principle that states that users should only be granted the permissions they need to do their job. This helps to protect against malware infections by preventing users from installing unauthorized software.

A host-based firewall can help to protect against malware infections by blocking malicious traffic from reaching a computer. However, it cannot prevent a user from installing malware if they have the necessary permissions.

System isolation is the practice of isolating systems from each other to prevent malware from spreading. This can be done by using virtual machines or network segmentation. However, system isolation can be complex and expensive to implement.

An application allow list is a list of applications that are allowed to run on a computer. This can help to prevent malware infections by preventing users from running unauthorized applications. However, an application allow list can be difficult to maintain and can block legitimate applications.

Therefore, the best way to protect against an employee inadvertently installing malware on a company system is to use the principle of least privilege. This will help to ensure that users only have the permissions they need to do their job, which will reduce the risk of malware infections.

Here are some additional benefits of least privilege:

• It can help to improve security by reducing the attack surface.
• It can help to simplify security management by reducing the number of permissions that need to be managed.
• It can help to improve compliance by reducing the risk of data breaches.

Mimikatz is a tool that can extract plaintext credentials from memory on Windows systems. A malicious flash drive can bypass the GPO blocking the flash drives by using techniques such as autorun.inf or HID spoofing to execute Mimikatz on the target system without user interaction or consent. This can cause AV alerts indicating Mimikatz attempted to run on the remote systems and also reduce the storage capacity of the flash drives to only 512KB by creating hidden partitions or files on them.