Storm-2657 Payroll Pirates HR SaaS salary-diversion campaign
Campaign
Summary
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The Storm-2657 Payroll Pirates operation is hijacking employee accounts to redirect salary payments, creating immediate fraud risk for U.S.-based organizations and especially higher education. The group uses phishing, adversary-in-the-middle (AitM) credential theft, and SSO takeover to reach HR systems such as Workday. Compromised mailboxes are then used to hide warnings, persist access, and push follow-on phishing across universities.
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Timeline
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10.10.2025 16:31 2 articles · 7mo ago
Microsoft discloses Storm-2657 Payroll Pirates campaign
Initial DisclosureMicrosoft reported that Storm-2657 is actively targeting U.S.-based organizations, especially higher education employees, to hijack Workday and Exchange Online accounts and divert salary payments to attacker-controlled accounts. The campaign uses phishing and adversary-in-the-middle credential theft to seize employee accounts, create inbox rules that hide Workday warning messages, enroll attacker-controlled MFA devices, and push follow-on phishing to other universities.
Show sources
- Microsoft Warns of ‘Payroll Pirates’ Hijacking HR SaaS Accounts to Steal Employee Salaries — thehackernews.com — 10.10.2025 16:31
- Microsoft Warns of ‘Payroll Pirates’ Hijacking HR SaaS Accounts to Steal Employee Salaries — thehackernews.com — 10.10.2025 16:31