Detection of System Information Discovery

ID: DET0601
Domains: Mobile
Analytics: AN1648, AN1649
Version: 1.0
Created: 21 October 2025
Last Modified: 12 May 2026

Analytics

AN1648

For Android, detect System Information Discovery by correlating analyst-visible device/network evidence and management state; use streaming or batched telemetry only where the documented collector is deployed. Correlate API Calls via Application Vetting / Instrumented Dynamic Analysis [Dynamic API/runtime trace: android.os.Build field reads > $SysInfoFieldThreshold$ distinct fields within $SysInfoWindow$ by app NOT IN $SysInfoAllowList$ at launch or in background]; Application State via Android Enterprise / EMM [Managed package inventory/status and package metadata]; Network Connection Creation via Android Enterprise Network Logging / Enterprise VPN [DevicePolicyManager.retrieveNetworkLogs(): DnsEvent / ConnectEvent; VPN flow metadata]. Alert on a sequence or state change inconsistent with the device/app baseline, approved management policy, or expected user workflow; do not infer unobserved API calls, file/process activity, or payload content from management state alone.

Log Sources
Data Component Name Channel
API Calls (DC0112) mobile:DynamicAnalysis Dynamic API/runtime trace: android.os.Build field reads > $SysInfoFieldThreshold$ distinct fields within $SysInfoWindow$ by app NOT IN $SysInfoAllowList$ at launch or in background
Application State (DC0123) android:EMM Managed package inventory/status and package metadata
Network Connection Creation (DC0082) android:EnterpriseNetworkLog DevicePolicyManager.retrieveNetworkLogs(): DnsEvent / ConnectEvent; VPN flow metadata
Mutable Elements
Field Description
SysInfoFieldThreshold Default 5 distinct Build fields within window. Single-field reads are legitimate.
SysInfoWindow Default 30s at launch.
SysInfoAllowList MDM agent, crash reporter, analytics SDK (if pre-approved). Derive from MDM catalog.
AppCDNList Per-app CDN. Derive by measurement.
FollowOnWindow Default 120s.

AN1649

For iOS, detect System Information Discovery by correlating analyst-visible device/network evidence and management state; use streaming or batched telemetry only where the documented collector is deployed. Correlate API Calls via Application Vetting / Instrumented Dynamic Analysis [Dynamic API/runtime trace: UIDevice.current.model]; Application State via Apple MDM [InstalledApplicationList / ManagedApplicationList]; Network Connection Creation via Apple Network Extension / Enterprise VPN [NEFilterFlow / per-app VPN / secure-web-gateway flow metadata]. Alert on a sequence or state change inconsistent with the device/app baseline, approved management policy, or expected user workflow; do not infer unobserved API calls, file/process activity, or payload content from management state alone.

Log Sources
Data Component Name Channel
API Calls (DC0112) mobile:DynamicAnalysis Dynamic API/runtime trace: UIDevice.current.model
Application State (DC0123) iOS:MDM InstalledApplicationList / ManagedApplicationList
Network Connection Creation (DC0082) iOS:NetworkExtension NEFilterFlow / per-app VPN / secure-web-gateway flow metadata
Mutable Elements
Field Description
SysInfoAllowList MDM agent, analytics SDK (pre-approved), crash reporter.
SysInfoWindow Default 30s at launch.
AppCDNList Per-app CDN. Derive by measurement.
FollowOnWindow Default 120s.