Detection of Proxy Through Victim

Technique Detected:  Proxy Through Victim | T1604

ID: DET0631
Domains: Mobile
Analytics: AN1702
Version: 1.0
Created: 21 October 2025
Last Modified: 12 May 2026

Analytics

AN1702

For Android, detect Proxy Through Victim by correlating analyst-visible device/network evidence and management state; use streaming or batched telemetry only where the documented collector is deployed. Correlate Application Permission via Android Enterprise DPC / Application Vetting [DevicePolicyManager.getPermissionGrantState(); PackageManager manifest/requested-permission review]; 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
Application Permission (DC0114) android:DevicePolicyManager DevicePolicyManager.getPermissionGrantState(); PackageManager manifest/requested-permission review
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
OS API Execution (DC0021) mobile:DynamicAnalysis Dynamic API/runtime trace: App initializes proxy-capable or raw-socket networking constructs (ServerSocket, SOCKS proxy client, bidirectional relay) NOT IN $ApprovedProxyApps$ — proxy initialization is the technique enabler
Mutable Elements
Field Description
ApprovedProxyApps VPN client, enterprise proxy agent, MDM agent with tunnel capability. Derive from MDM catalog. Tightening: only MDM-provisioned VPN apps.
RelayWindow Default 5s between inbound session and outbound relay connection. Proxy relay is near-synchronous. Tightening: 2s.
FanOutThreshold Default 3 distinct outbound destinations per inbound session. Single-destination relay may be VPN; multi-destination fan-out is proxy.