Detection of Impersonate SS7 Nodes

ID: DET0662
Domains: Mobile
Analytics: AN1753, AN1754
Version: 1.0
Created: 21 October 2025
Last Modified: 12 May 2026

Analytics

AN1753

For Android, detect Impersonate SS7 Nodes by correlating analyst-visible device/network evidence and management state; use streaming or batched telemetry only where the documented collector is deployed. Correlate Network Communication via Android Enterprise Network Logging / Enterprise VPN [DevicePolicyManager.retrieveNetworkLogs(): DnsEvent / ConnectEvent; VPN flow metadata]; Network Traffic Content via Enterprise Secure Web Gateway / Proxy [DNS/HTTP(S) inspection or proxy transaction metadata where enterprise decryption/inspection is deployed]; Network Traffic Flow 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
Network Communication (DC0113) android:EnterpriseNetworkLog DevicePolicyManager.retrieveNetworkLogs(): DnsEvent / ConnectEvent; VPN flow metadata
Network Traffic Content (DC0085) webproxy:applog DNS/HTTP(S) inspection or proxy transaction metadata where enterprise decryption/inspection is deployed
Network Traffic Flow (DC0078) android:EnterpriseNetworkLog DevicePolicyManager.retrieveNetworkLogs(): DnsEvent / ConnectEvent; VPN flow metadata
Mutable Elements
Field Description
LegitimateRoamingPartners Carrier-maintained verified roaming partner GT/PC list.
MonitoredMSISDNList Enterprise employee MSISDN list for targeted monitoring. Derive from HR.
SS7QueryThreshold Default 3 queries for same MSISDN within window.
SS7QueryWindow Default 3600s.

AN1754

For iOS, detect Impersonate SS7 Nodes by correlating analyst-visible device/network evidence and management state; use streaming or batched telemetry only where the documented collector is deployed. Correlate Network Communication via Apple Network Extension / Enterprise VPN [NEFilterFlow / per-app VPN / secure-web-gateway flow metadata]; Network Traffic Content via Enterprise Secure Web Gateway / Proxy [DNS/HTTP(S) inspection or proxy transaction metadata where enterprise decryption/inspection is deployed]; Network Traffic Flow 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
Network Communication (DC0113) iOS:NetworkExtension NEFilterFlow / per-app VPN / secure-web-gateway flow metadata
Network Traffic Content (DC0085) webproxy:applog DNS/HTTP(S) inspection or proxy transaction metadata where enterprise decryption/inspection is deployed
Network Traffic Flow (DC0078) iOS:NetworkExtension NEFilterFlow / per-app VPN / secure-web-gateway flow metadata
Mutable Elements
Field Description
LegitimateRoamingPartners Same carrier roaming partner list.
SS7QueryThreshold Default 3 queries.
SS7QueryWindow Default 3600s.