What is the first step in investigating based on a detection?

Beginning an investigation based on a detection with a hash search is an effective strategy because it allows you to quickly identify known malicious files that may have been detected in the environment. Hash values are unique identifiers derived from the file's content, enabling a precise way to determine if a file has been previously encountered within threat intelligence databases. This can lead to swift identification of threats, as known malicious files have established signatures that can be correlated with existing datasets.

Starting with a hash search can significantly expedite the investigation process, as it narrows down the focus on files tied to specific threats, facilitating further analysis and response measures. This method is particularly beneficial because it leverages existing intelligence and allows for immediate action in cases where a file is confirmed as malicious.

In contrast, querying the IP address first may not provide as direct or rapid a connection to maliciousness compared to a hash search, especially if the IP has multiple legitimate uses. Utilizing a static analysis tool, while useful in examining file behaviors in a controlled environment, can be more time-intensive and thus less efficient than initiating the process with hash verification. Analyzing host performance metrics can also provide some context, but it typically comes later in the investigation after identifying suspicious files or processes, as performance metrics may not directly indicate