New-hire personal-crisis pretext combined with explicit personal-device request within 30 days of hire
Detects email from a new hire (within 30 days of hire date) combining personal-crisis pretext language with an explicit request to use a personal or unmanaged device, corroborated by a non-compliant or untrusted device sign-in, consistent with PurpleDelta's device-substitution social-engineering pattern.
Microsoft Sentinel (KQL)

