Email with malicious attachment opened by user

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abnormal-security

Classification:

attack

Tactic:

TA0001-initial-access

Technique:

T1566-phishing

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Goal

Detect when an email with a malicious attachment is opened.

Strategy

This rule monitors Abnormal logs to detect when a malicious file is opened by a user.

Triage and response

  1. Investigate the user, {{@messages.toAddresses}}, who was impacted by the email.
  2. If confirmed as a threat, implement measures to block or limit the impact of the suspicious activity.
  3. Follow company procedures for handling malicious files, including isolating the endpoint, running antivirus/antimalware scans, analyzing logs, and updating security policies.