Impair Defenses
Where this stands
No Sigma rule can address this — the telemetry MITRE names has no Sigma logsource behind it.
Sigma has no logsource taxonomy for mobile platforms. MITRE's telemetry here is mobile EDR and device APIs, which no Sigma rule can address.
What the technique is
Adversaries may maliciously modify components of a victim environment in order to hinder or disable defensive mechanisms. This not only involves impairing preventative defenses, such as anti-virus, but also detection capabilities that defenders can use to audit activity and identify malicious behavior. This may span both native defenses as well as supplemental capabilities installed by users or mobile endpoint administrators.
Read it on attack.mitre.orgWhat MITRE says you would watch
- 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.
Technique names and descriptions © MITRE ATT&CK®, CC BY 4.0. Not endorsed by MITRE.