Analytics BIOC Informational
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External email display name impersonation of internal personnel

Potential email attempting to impersonate an internal user has been detected. The sender's email address appears unusual in relation to the provided display name, suggesting a possible impersonation attempt targeting an internal user.

Module:
Email Security
Licensed by:
Email Security
Data source:
Microsoft 365 Emails
ATT&CK tactics: Defense Evasion (TA0005)
ATT&CK techniques: Impersonation (T1656)
Detector tags: Employee Impersonation Spear Phishing
Attacker's goals:

Impersonate internal users or familiar individuals and trick them into clicking on malicious links or attachments.

Investigative actions:

Check the email address for any unusual spellings, missing letters, or unknown domains. 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 or links, scrutinize them for any suspicious indications. Monitor further actions taken, such as file downloads or access to potentially malicious links.

Test period:
N/A (single event)
Deduplication:
1 Hour 30 Minutes
1 variation:
  • External email display name impersonation of internal personnel, using a public provider Informational