Mimecast Alert: malicious URL clicked by user

This rule is part of a beta feature. To learn more, contact Support.
mimecast

Classification:

attack

Tactic:

TA0001-initial-access

Technique:

T1566-phishing

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Goal

To detect and alert when an email contains a malicious URL, potentially indicating a phishing attempt or other security threat.

Strategy

This rule identifies emails transiting through the organization’s email gateway that contain URLs classified as malicious under a ttp definition {{@ttpDefinition}}. These URLs may be part of phishing campaigns, malware distribution, or other malicious activities.

Triage and response

  1. Investigate the email source and content, focusing on the sender’s IP address: {{@senderIPAddress}}.
  2. Check the URL against known threat databases and analyse the email for other indicators of compromise.
  3. Follow the organization’s incident response protocol, which may include:
    • Isolating the email to prevent further spread.
    • Notifying affected users and guiding them on how to proceed.
    • Updating security filters to catch similar future attempts.