Quick Summary
Many security teams still rely on click rates to measure phishing effectiveness, which can be misleading. The real concern is the potential damage an attacker can inflict once they gain access to a mailbox. With the rise of inbox breaches, organizations need to focus on resilience and containment strategies rather than just prevention.
The Securityish Brief
Security teams often measure phishing success by click rates, which can fluctuate and fail to indicate the actual risk. The more critical question is the potential damage an attacker can cause once they access a mailbox. This issue is compounded by the increasing number of inbox breaches that occur without phishing attempts.
Once inside, attackers can exfiltrate sensitive data, reset passwords for other applications, and use compromised identities to target other employees. Multi-factor authentication (MFA) is not foolproof, as attackers can find ways to bypass it. Therefore, organizations must shift their focus from solely preventing attacks to building resilience against them.
Material Security provides automated remediation workflows that help manage risks by recovering sensitive attachments and revoking risky app permissions without manual intervention. This approach is essential as modern attacks are sophisticated and can occur at scale.
The Layered Approach to Email Security
Effective email security requires a layered approach that includes prevention, detection, recovery, and containment. Prevention focuses on blocking threats and fixing vulnerabilities, while detection involves identifying signs of compromise before damage occurs. Containment aims to minimize the impact of a breach by limiting an attacker’s ability to exfiltrate data or move laterally within the network.
Containment strategies include making mailbox exfiltration more difficult, blocking lateral movement through password resets, and addressing legacy security settings that attackers exploit. These measures significantly reduce the potential damage from a breach.
Organizations often excel in prevention but struggle with detection and containment. As a result, many are unprepared for the realities of modern cyber threats, which require a proactive and comprehensive security posture.
What to Measure Instead
Instead of relying on click rates, organizations should focus on metrics that reflect their actual risk. Key metrics include mailbox lootability, reset-path exposure, and time-to-contain. By understanding these factors, organizations can better assess their security posture and respond effectively to potential breaches.
Key Takeaways
- Evaluate your current email security metrics to ensure they reflect actual risks rather than just click rates.
- Implement automated remediation workflows to handle security incidents without manual intervention.
- Enhance containment measures to limit the damage an attacker can do once they gain access to a mailbox.
- Regularly audit your email settings and permissions to eliminate legacy configurations that could be exploited.
- Train employees on recognizing phishing attempts and the importance of reporting suspicious activity.
Key Terms & Concepts
- Mailbox Lootability: In this article, mailbox lootability refers to the amount of sensitive content accessible without additional verification.
- Reset-Path Exposure: Reset-path exposure describes how many critical applications can be accessed through email-only password resets.
- Containment: Containment is a set of controls aimed at limiting the damage an attacker can inflict after breaching an account.
Read the original article here: https://www.bleepingcomputer.com/news/security/email-security-needs-more-seatbelts-why-click-rate-is-the-wrong-metric/
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