T1424Not expressible in SigmaMOBILE

Process Discovery

DiscoveryAndroid, iOS

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 attempt to get information about running processes on a device. Information obtained could be used to gain an understanding of common software/applications running on devices within a network. Adversaries may use the information from Process Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions. Recent Android security enhancements have made it more difficult to obtain a list of running processes. On Android 7 and later, there is no way for an application to obtain the process list without abusing elevated privileges. This is due to the Android kernel utilizing the hidepid mount feature. Prior to Android 7, applications could utilize the ps command or examine the /proc directory on the device. In iOS, applications have previously been able to use the sysctl command to obtain a list of running processes. This functionality has been removed in later iOS versions.

Read it on attack.mitre.org

What MITRE says you would watch

AN1804
Defender observes an app/package attempting to enumerate running processes by triggering restricted process visibility mechanisms (e.g., repeated queries for running tasks/services, rapid iteration over process identifiers, or access attempts against /proc entries) that are atypical for its declared function and occur without an associated user-facing diagnostic workflow. The detection relies on correlating (1) OS/API calls or shell/system utility execution indicative of process listing or /proc traversal, (2) app privilege context (root, debug build, device owner/profile owner, accessibility/IME status), (3) background execution state, and (4) optional follow-on behaviors consistent with au […]
AN1805
Defender observes signals consistent with attempted process listing on iOS where modern OS protections generally prevent broad process enumeration for non-root apps. Detections therefore focus on: (1) feasibility gating via integrity/jailbreak posture, and (2) observable security/log anomalies consistent with attempts to query process tables or restricted system interfaces (e.g., repeated sandbox denials, suspicious sysctl-like access attempts, or abnormal use of private frameworks). […]