Suspicious SharePoint File Download Using PowerShell User Agent
- Product
- m365
- Service
- sharepoint
- Author
- HuntRule
- Published
- 2026-10-12
- Updated
- 2026-10-12
ATT&CK techniques
CollectionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects SharePoint or OneDrive file download events whose user agent contains PowerShell as observed in ShinyHunters branded SaaS data theft. Attackers script bulk downloads of documents after harvesting SSO credentials through vishing.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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Also included
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