NSE7_ADA-6.3 Fortinet NSE 7 - Advanced Analytics 6.3 Questions and Answers

The windows agent is not delivering event logs correctly because the agent is unmanaged, meaning it is not assigned to any organization or customer. The supervisor will drop the logs silently from unmanaged agents, as they are not associated with any valid license or CMDB.

The natural_id value identifies the collector in the FortiSIEM system. The natural_id is a unique identifier that is assigned to each collector during the registration process with the supervisor. The natural_id is used to associate events and performance data with the collector that collected them.

The incident from FortiSIEM shown in the exhibit is a brute force attack on a FortiGate device. The remediation option available to the administrator is to run the block IP FortiOS 5.4 action, which will block the source IP address of the attacker on the FortiGate device using a firewall policy.

The profile database contains CPU utilization values from day one. At midnight on the second day, the CPU utilization values from the daily database will be merged with the profile database using a weighted average formula:

New value = (Old value x Old weight) + (New value x New weight) / (Old weight + New weight)

The weight is determined by the number of days in each database. In this case, the profile database has one day of data and the daily database has one day of data, so the weight is equal for both databases. Therefore, the formula simplifies to:

New value = (Old value + New value) / 2

In the profile database, in the Hour of Day column where 9 is the value, the updated minimum, maximum, and average CPU utilization values are:

Min CPU Util = (32.31 + 32.31) / 2 = 32.31 Max CPU Util = (33.50 + 33.50) / 2 = 33.50 AVG CPU Util = (32.67 + 32.67) / 2 = 32.67

When a user is off-net, meaning they are not connected to a network where a FortiSIEM collector is reachable, then UEBA events will be cached locally by the agent if it cannot upload them to a FortiSIEM collector. The agent will store up to 100 MB of events in a local database file and try to upload them when it detects a network change or every five minutes.

Tactic is what an attacker hopes to achieve in the MITRE ATT&CK framework. Tactic is a high-level category of adversary behavior that describes their objective or goal. For example, some tactics are Initial Access, Persistence, Lateral Movement, Exfiltration, etc. Each tactic consists of one or more techniques that describe how an attacker can accomplish that tactic.

The unused events for the next three minutes for a 520 EPS license can be calculated by multiplying the licensed EPS by the time interval and subtracting the total number of events received in that interval. In this case, the calculation is:

520 x 180 - 27000 = 73460