Microsoft Warns of ‘Payroll Pirates’ Hijacking HR SaaS Accounts to Steal Employee Salaries

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European organizations should implement phishing-resistant, passwordless multi-factor authentication methods such as FIDO2 security keys to prevent credential and MFA code theft via phishing. Regularly audit HR SaaS accounts and associated email accounts for suspicious activities, including unknown MFA device enrollments and malicious inbox rules that delete or redirect notification emails. Enforce strict monitoring and alerting on changes to payroll and payment information within HR platforms. Conduct targeted user awareness training focused on recognizing sophisticated phishing attempts, especially those employing adversary-in-the-middle techniques. Implement conditional access policies that restrict access based on device compliance and location to reduce risk from compromised credentials. Employ email security solutions with advanced anti-phishing capabilities and anomaly detection to identify and block phishing campaigns early. Establish incident response procedures specifically for SaaS account compromises involving payroll systems, including rapid revocation of unauthorized MFA devices and account recovery steps. Collaborate with SaaS providers to leverage their security features and ensure timely updates on emerging threats. Finally, conduct regular penetration testing and red team exercises simulating social engineering attacks to evaluate organizational resilience against such threats.