Punycode characters detected in URL(s)

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Hour 30 Minutes
Required Data	Microsoft 365 Emails
Detection Modules	Email
Detector Tags	Malicious URLs
ATT&CK Tactic	Stealth (TA0005), Execution (TA0002)
ATT&CK Technique	Masquerading (T1036), User Execution (T1204)
Severity	Informational

Description

Punycode character(s) detected within URL(s) in email content.

Attacker's Goals

Cause a different URL to be presented to the user as a legitimate URL, prompting user engagement.

Investigative actions

• Examine the sender's IP address and reputation.
• Check the email address and content for any unusual spellings, missing letters, or unknown domains.
• 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.