Case Study: International Bank achieves regulatory compliance and prevents insider fraud with Splunk

How Splunk Software Is Used To Meet Audit Requirements And Prevent Insider Fraud At An International Bank

An international bank faced an urgent audit for Mandatory Block Leave — a regulatory requirement that certain employees take two contiguous weeks off with no access to work systems — but its time-off records were inconsistent (paper, disparate HRIS) and employees logged into dozens of different systems with varied identity fields. Auditors demanded rapid proof of “no activity,” a task that would have taken months and new headcount using the bank’s existing tools, while the risk of insider fraud further complicated compliance efforts.

The bank leveraged Splunk Enterprise (and later the Splunk App for Enterprise Security) to ingest and normalize log data across systems, correlate user identities, and build Block Leave dashboards and searches to validate inactivity and flag anomalies. The solution produced auditor-ready reports, exposed and stopped credential‑spoofing fraud rings that had been approving risky loans, avoided millions in regulatory penalties and losses, and delivered operational savings (including ~$300K/year avoided hiring and ~$1.5M/year of staff costs redirected).