To temporarily or permanently block a file, the administrator should use the Deny List option. Adding a file to the Deny List prevents it from executing or being accessed on the system, providing a straightforward way to block suspicious or unwanted files.

Functionality of Deny List:

Files on the Deny List are effectively blocked from running, which can be applied either temporarily or permanently depending on security requirements.

This list allows administrators to manage potentially malicious files by preventing them from executing across endpoints.

Why Other Options Are Not Suitable:

Delete (Option A) is a one-time action and does not prevent future attempts to reintroduce the file.

Hide (Option B) conceals files but does not restrict access.

Encrypt (Option C) secures the file's data but does not prevent access or execution.

Symantec Endpoint Protection (SEP) may be unable to remediate a file in certain situations. Two primary reasons for this failure are:

The detected file is in use (Option B): When a file is actively being used by the system or an application, SEP cannot remediate or delete it until it is no longer in use. Active files are locked by the operating system, preventing modification.

Insufficient file permissions (Option C): SEP needs adequate permissions to access and modify files. If SEP does not have the necessary permissions for the detected file, it cannot perform remediation.

Why Other Options Are Incorrect:

Another scan in progress (Option A) does not directly prevent remediation.

File marked for deletion on restart (Option D) would typically allow SEP to complete the deletion upon reboot.

File with good reputation (Option E) is less likely to be flagged for remediation but would not prevent it if flagged.

The Exfiltration stage in the threat lifecycle is when attackers attempt to gather and transfer valuable data from a compromised system to an external location under their control. This stage typically follows data discovery and involves:

Data Collection: Attackers collect sensitive information such as credentials, financial data, or intellectual property.

Data Transfer: The data is then transferred out of the organization's network to the attacker's servers, often through encrypted channels to avoid detection.

Significant Impact on Security and Privacy: Successful exfiltration can lead to substantial security and privacy violations, emphasizing the importance of detection and prevention mechanisms.

Exfiltration is a critical stage in a cyber attack, where valuable data is removed, posing a significant risk to the compromised organization.

To block facebook.com use during business hours, the SEP administrator should configure the Action, Hosts(s), and Schedule components within the Firewall rule.

Explanation of Each Component:

Action: Set to 'Block' to deny access to the specified site.

Hosts(s): Specify facebook.com as the target host, ensuring that all traffic to this domain is blocked.

Schedule: Define the rule to apply only during business hours, ensuring that access is restricted within the designated time frame.

Why Other Options Are Incorrect:

Network Interface and Network Service (Options A and B) are not specific to blocking domain access.

Application (Options B and D) is unnecessary if the goal is to block access based on domain and schedule.

Memory Exploit Mitigation in Symantec Endpoint Protection (SEP) works by injecting a DLL (Dynamic Link Library) --- specifically, IPSEng32.dll for 32-bit processes or IPSEng64.dll for 64-bit processes --- into applications that require protection. Here's how it works:

DLL Injection:

When Memory Exploit Mitigation is enabled, SEP injects IPSEng DLLs into processes that it monitors for potential exploit attempts.

This injection allows SEP to monitor the behavior of the process at a low level, enabling it to detect exploit attempts on protected applications.

Exploit Detection and Response:

If an exploit attempt is detected within a protected process, SEP will terminate the process immediately. This termination prevents malicious code from running, stopping potential exploit actions from completing.

Why This Approach is Effective:

By terminating the process upon exploit detection, SEP prevents any code injected or manipulated by an exploit from executing. This proactive approach effectively stops many types of memory-based attacks, such as buffer overflows, before they can harm the system.

Clarification on Other Options:

Option B (UMEngx86.dll) pertains to user-mode protection, which isn't used for Memory Exploit Mitigation.

Option C (sysfer.dll) is involved in file system driver activities, not direct exploit prevention.

Option D is partially correct about IPSEng32.dll but inaccurately specifies that it's for browser processes only; the DLL is used for multiple types of processes.