This process tree indicates a phishing attack, as it shows a user opening an email attachment (outlook.exe) that launches a malicious macro (cmd.exe) that downloads and executes a payload (powershell.exe) that connects to a remote server (svchost.exe). A phishing attack is a type of social engineering attack that uses deceptive emails or messages to trick users into opening malicious attachments or links that can compromise their systems or credentials.

Bulk Domain Search is the tool that you should use in Falcon to review a list of domains recently banned by your organization's acceptable use policy and look for the number of hosts that have visited each domain. Bulk Domain Search is an Investigate tool that allows you to search for multiple domains at once and view their network connection events across all hosts in your environment. It shows information such as domain name, number of hosts visited, number of detections generated, etc. for each domain. Create a custom alert for each domain, Allowed Domain Summary Report, and IP Addresses Search are not tools that you should use for this purpose.

_time is the SPL (Splunk) field name that can be used to automatically convert Unix times (Epoch) to UTC readable time within the Falcon Event Search. It is a default field that shows the timestamp of each event in a human-readable format. utc_time, conv_time, and time are not valid SPL field names for converting Unix times to UTC readable time.

The strftime eval function is used to convert Unix times (Epoch) into UTC readable time. It takes two arguments: a Unix time field and a format string that specifies how to display the time. The now, typeof, and relative_time eval functions are not used to convert Unix times into UTC readable time.

A threat hunting framework is a methodology that guides threat hunters in planning, executing, and improving their threat hunting activities. A benefit of using a threat hunting framework is that it provides actionable, repeatable steps to conduct threat hunting in a consistent and efficient manner. A threat hunting framework does not automatically generate incident reports, eliminate false positives, or provide high fidelity threat actor attribution, as these are dependent on other factors such as data sources, tools, and analysis skills.