Initial person-to-person email contact

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Microsoft 365 Emails
Detection Modules	Email
Detector Tags	Phishing
ATT&CK Tactic	Execution (TA0002), Credential Access (TA0006)
ATT&CK Technique	User Execution (T1204), Brute Force: Password Cracking (T1110.002)
Severity	Informational

Description

Identifies when a sender initiates contact with individuals with no prior history of interaction in the last 30 days.

Attacker's Goals

Trick the user on clicking the link, while avoiding detection.

Investigative actions

• Examine the sender's IP address and reputation.
• Verify whether the sender's IP address has appeared in different log sources before, and if it is recognizable.
• If the message contains attachments/links, scrutinize them for any suspicious indications.
• Monitor further actions taken, such as file downloads or access to potentially malicious links.