Unusual process accessed a messaging app's files

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent with eXtended Threat Hunting (XTH)
Detector Tags	Sensitive Information Stealing Analytics
ATT&CK Tactic	Collection (TA0009), Reconnaissance (TA0043)
ATT&CK Technique	Data from Local System (T1005), Gather Victim Host Information (T1592)
Severity	Low

Description

An unusual process has accessed files belonging to a messaging app.

Attacker's Goals

Obtain access to the user's message history and steal their contents.

Investigative actions

• Determine whether it is legitimate for the process to access such files.
• Analyze the process/application that accessed the file.
• Check for any other suspicious actions that were performed by the process.
• Look for unusual access of resources using credentials that may have been associated with the above messaging app.