Privilege Escalation via CAP_SETUID/SETGID Capabilities
editPrivilege Escalation via CAP_SETUID/SETGID Capabilities
editIdentifies instances where a process (granted CAP_SETUID and/or CAP_SETGID capabilities) is executed, after which the user’s access is elevated to UID/GID 0 (root). In Linux, the CAP_SETUID and CAP_SETGID capabilities allow a process to change its UID and GID, respectively, providing control over user and group identity management. Attackers may leverage a misconfiguration for exploitation in order to escalate their privileges to root.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Linux
- Use Case: Threat Detection
- Tactic: Privilege Escalation
- Data Source: Elastic Defend
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editsequence by host.id, process.entity_id with maxspan=1s [process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and process.name != null and (process.thread.capabilities.effective : "CAP_SET?ID" or process.thread.capabilities.permitted : "CAP_SET?ID") and user.id != "0"] [process where host.os.type == "linux" and event.action == "uid_change" and event.type == "change" and (process.thread.capabilities.effective : "CAP_SET?ID" or process.thread.capabilities.permitted : "CAP_SET?ID") and user.id == "0"]
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/
-
Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
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Sub-technique:
- Name: Setuid and Setgid
- ID: T1548.001
- Reference URL: https://attack.mitre.org/techniques/T1548/001/