Suspicious Unprivileged User Namespace Creation via unshare for OverlayFS Exploitation (via process_creation)

ATT&CK techniques

Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1068Exploitation for Privilege Escalation
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects unshare creating a new user namespace with root mapping, the entry point the GameOverlay Ubuntu OverlayFS exploit uses to gain mount privileges inside an unprivileged namespace. While container tooling can use unshare legitimately, this pattern combined with interactive shells on a workload can indicate an attempt at local privilege escalation.

Reporting behind it

Related detections9 linkedT1068 — drag to rearrange

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Suspicious Modification of Privileged Authentication Binaries via Kernel LPE

Malicious EDR Evasion Driver Load from AnyDesk Directory via k.sys (via image_load)

Suspicious Unprivileged User Namespace Creation via unshare for OverlayFS Exploitation (via process_creation)

Pivot detection · T1068 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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