Suspicious User and Network Namespace Creation via unshare on Linux

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1068Exploitation for Privilege Escalation
- T1548.001Setuid and Setgid
Defense Evasion
- T1548.001Setuid and Setgid
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects use of unshare to create combined user and network namespaces as leveraged by the Copy Fail and DirtyFrag Linux page cache exploits in Elastic research. Unprivileged user namespace creation is a common precursor to kernel exploitation that grants capabilities inside the new namespace for privilege escalation.

Reporting behind it

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Suspicious User and Network Namespace Creation via unshare on Linux

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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