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Added detection testing service results inLinux Setuid Using Chmod Utility
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@@ -15,18 +15,19 @@ description: This analytic looks for suspicious chmod utility execution to enabl
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is the SGID, or set group id bit. It is similar to the SUID bit, except it can temporarily
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change group membership, usually to execute a program. The SGID bit is set if an
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s or an S appears in the group section of permissions.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
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WHERE (Processes.process_name = chmod OR Processes.process = "*chmod *") AND Processes.process IN("* g+s *", "* u+s *", "* 4777 *", "* 4577 *")
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by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
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| `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `linux_setuid_using_chmod_utility_filter`'
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes WHERE (Processes.process_name = chmod
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OR Processes.process = "*chmod *") AND Processes.process IN("* g+s *", "* u+s *",
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"* 4777 *", "* 4577 *") by Processes.dest Processes.user Processes.parent_process_name
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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Processes.process_guid | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `linux_setuid_using_chmod_utility_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: administrator or network operator can execute this command. filter is needed
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Sysmon TA.
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known_false_positives: administrator or network operator can execute this command.
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filter is needed
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references:
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- https://www.hackingarticles.in/linux-privilege-escalation-using-capabilities/
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tags:
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@@ -46,17 +47,16 @@ tags:
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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security_domain: endpoint
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impact: 70
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confidence: 70
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# (impact * confidence)/100
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confidence: 70
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risk_score: 49
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context:
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- source:endpoint
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@@ -73,3 +73,4 @@ tags:
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- CIS 3
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- CIS 5
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- CIS 16
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automated_detection_testing: passed
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