Detection of Impair Defenses

Technique Detected:  Impair Defenses | T1629

ID: DET0687
Domains: Mobile
Analytics: AN1797
Version: 1.0
Created: 21 October 2025
Last Modified: 21 October 2025

Analytics

AN1797

Correlates (1) application-driven modification of device security posture or monitoring capability (e.g., accessibility abuse, disabling security app components, altering monitoring configuration), (2) immediate degradation or cessation of expected telemetry sources such as mobile EDR, sensor visibility, or system monitoring, and (3) subsequent application activity continuing with reduced observability. The defender observes a causal chain where defensive visibility or enforcement is altered first, followed by continued execution under reduced monitoring conditions.

Log Sources
Data Component Name Channel
Application Permission (DC0114) android:MDMLog change to security-relevant device configuration or managed policy (e.g., accessibility enablement, app admin changes, security service state change) preceding telemetry degradation
Application State (DC0123) MobileEDR:telemetry ecurity or monitoring application transitions to disabled, inactive, or non-reporting state while other applications remain active
OS API Execution (DC0021) MobileEDR:telemetry application invokes system framework operations that alter monitoring, accessibility, or execution visibility followed by reduction in expected telemetry generation
Mutable Elements
Field Description
TimeWindow Correlation window between configuration change, telemetry degradation, and subsequent activity
ExpectedTelemetrySources Baseline set of telemetry sources expected to report continuously (EDR, sensor feeds, monitoring services)
TelemetryGapThreshold Duration or volume threshold defining abnormal loss of telemetry
AllowedAppList Applications legitimately capable of modifying device configuration or security posture
CriticalControlSet Set of security-relevant controls considered high-impact if altered (EDR, accessibility, admin APIs)
UplinkBytesThreshold Outbound traffic threshold used to confirm continued activity during telemetry loss