Internet Connection Discovery
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 check for Internet connectivity on compromised systems. This may be performed during automated discovery and can be accomplished in numerous ways such as using adb shell netstat for Android. Adversaries may use the results and responses from these requests to determine if the mobile devices are capable of communicating with adversary-owned C2 servers before attempting to connect to them. The results may also be used to identify routes, redirectors, and proxy servers.
Read it on attack.mitre.orgWhat MITRE says you would watch
- AN1831
Application vetting services could look for usage of the READ_PRIVILEGED_PHONE_STATE Android permission. This could indicate that non-system apps are attempting to access information that they do not have access to.
- AN1832
Application vetting services could look for usage of the READ_PRIVILEGED_PHONE_STATE Android permission. This could indicate that non-system apps are attempting to access information that they do not have access to.
Technique names and descriptions © MITRE ATT&CK®, CC BY 4.0. Not endorsed by MITRE.