[New Rule] Privilege Elevation via Sudoers File Modification (#917)

* [New Rule] Privilege Elevation via Sudoers File Modification * Update privilege_escalation_echo_nopasswd_sudoers.toml * group args * Update rules/cross-platform/privilege_escalation_echo_nopasswd_sudoers.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * Update rules/cross-platform/privilege_escalation_echo_nopasswd_sudoers.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * lint rule * added subtechnique Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>
2021-02-09 21:58:31 +01:00
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commit 769ced1001
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+[metadata]
+creation_date = "2021/01/26"
+maturity = "production"
+updated_date = "2021/01/26"
+
+[rule]
+author = ["Elastic"]
+description = """
+A sudoers file specifies the commands users or groups can run and from which terminals. Adversaries can take advantage
+of these configurations to execute commands as other users or spawn processes with higher privileges.
+"""
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Potential Privilege Escalation via Sudoers File Modification"
+risk_score = 73
+rule_id = "76152ca1-71d0-4003-9e37-0983e12832da"
+severity = "high"
+tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Privilege Escalation"]
+type = "query"
+
+query = '''
+event.category:process and event.type:start and process.args:(echo and *NOPASSWD*ALL*)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1548"
+name = "Abuse Elevation Control Mechanism"
+reference = "https://attack.mitre.org/techniques/T1548/"
+[[rule.threat.technique.subtechnique]]
+id = "T1548.003"
+name = "Sudo and Sudo Caching"
+reference = "https://attack.mitre.org/techniques/T1548/003/"
+
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"
+