Unusual display name in From header

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
ATT&CK Tactic	Reconnaissance (TA0043), Initial Access (TA0001)
ATT&CK Technique	Phishing for Information (T1598), Phishing (T1566)
Severity	Informational

Description

An email was detected with an unusual display name in the From header.

Attacker's Goals

Evade defenses and hide potential malicious data inside the email display name.

Investigative actions

• Analyze the email further to determine the source of the anomaly and what can be done about it.

Variations

Unusual display name in the From header containing an embedded URL

Synopsis

Field	Value
ATT&CK Tactic	Reconnaissance (TA0043), Initial Access (TA0001)
ATT&CK Technique	Phishing for Information (T1598), Phishing (T1566)
Severity	Low

Description

An email was detected with an unusual sender display name in the From header containing an embedded URL.

Attacker's Goals

Evade defenses and hide potential malicious data inside the email display name.

Investigative actions

• Analyze the email further to determine the source of the anomaly and what can be done about it.

Unusual display name in the From header that is identical to the email address

Synopsis

Field	Value
ATT&CK Tactic	Reconnaissance (TA0043), Initial Access (TA0001)
ATT&CK Technique	Phishing for Information (T1598), Phishing (T1566)
Severity	Informational

Description

An email was detected where the display name in the From header is unusual and matches the sender email address.

Attacker's Goals

Evade defenses and hide potential malicious data inside the email display name.

Investigative actions

• Analyze the email further to determine the source of the anomaly and what can be done about it.