AI SECURITY
AI Data Security Remediation
A global financial services firm rolled out Microsoft Copilot across its entire distributed workforce, giving employees AI-assisted access to its Microsoft 365 and Azure estate. Under an accelerated time frame, SIS Cyber implemented and tested security controls to prevent unrestricted access to data by Copilot, thereby reducing risk and increasing visibility and auditability, while still enabling high velocity innovation by the client’s knowledge workers.
The Challenge
The organization had recently rolled out Microsoft Copilot across teams with access to SharePoint, Outlook, and Teams, but had no visibility into whether the AI assistant could be manipulated into revealing sensitive information it wasn’t meant to surface. Leadership needed to understand their actual exposure to prompt injection and data exfiltration before an incident — not after.
Our Approach
1
Mapped risk categories specific to Copilot’s integration with SharePoint, Outlook, and Teams to define the scope of data access.
2
Conducted reconnaissance to determine what environment and data information Copilot could be prompted to reveal.
3
Engineered and refined prompt injection payloads targeting Copilot’s data access boundaries.
4
Developed test methodologies for data exfiltration exposure to validate real-word exploitability.
5
Assessed findings against client policy, data governance, and employee usage patterns.
6
Delivered mitigation recommendations spanning policy tuning, prompt governance, employee training, and technical controls.
4
Developed test methodologies for data exfiltration exposure to validate real-word exploitability.
5
Assessed findings against client policy, data governance, and employee usage patterns.
6
Delivered mitigation recommendations spanning policy tuning, prompt governance, employee training, and technical controls.
Key Outcomes
Remediated exploitable prompt injection paths within the Microsoft 365 Copilot environment.
Implemented security controls for data exposure risks across SharePoint, Outlook, Teams, and Copilot Studio.
Delivered a prioritized mitigation roadmap covering policy, governance, and technical controls.
Gave leadership a clear, evidence-based picture of AI-related data security risk.
Additional Projects
A sample of the real-world engagements we have delivered for our clients.
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OWASP SAMM Assessments
Structured software assurance maturity assessments using the OWASP SAMM framework to benchmark and improve secure development practices.
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CNAPP Migration
Seamless migration to modern CNAPP solutions with zero operational downtime, preserving policy continuity and security posture throughout.
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Whether you are dealing with an active incident or planning your next-generation security architecture, our team of experts is ready to assist.
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