mirror of
https://github.com/splunk/security_content
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Michael Haag
70 lines
3.6 KiB
YAML
70 lines
3.6 KiB
YAML
name: Windows Sqlservr Spawning Shell
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id: d33aac9f-030c-4830-8701-0c2dd75bb6cb
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version: 1
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date: '2025-02-04'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: This analytic detects instances where the sqlservr.exe process spawns a command shell (cmd.exe) or PowerShell process. This behavior is often indicative of command execution initiated from within the SQL Server process, potentially due to exploitation of SQL injection vulnerabilities or the use of extended stored procedures like xp_cmdshell.
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data_source:
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- Sysmon EventID 1
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- Windows Event Log Security 4688
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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.parent_process_name="sqlservr.exe"
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`process_cmd` OR `process_powershell`
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by Processes.dest Processes.user Processes.parent_process Processes.parent_process_name
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Processes.process_name Processes.process Processes.process_id Processes.original_file_name
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Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_sqlservr_spawning_shell_filter`'
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how_to_implement: To implement this detection, you need to be ingesting endpoint data that captures process creation events, specifically the parent-child process relationships. Ensure that you are collecting Sysmon Event ID 1 or Windows Event Log Security 4688 events. The data should be mapped to the Endpoint data model in Splunk.
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known_false_positives: Legitimate administrative activities or monitoring tools might occasionally spawn command shells from sqlservr.exe. Review the process command-line arguments and consider filtering out known legitimate processes or users.
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references:
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- https://attack.mitre.org/techniques/T1505/001/
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- https://github.com/MHaggis/notes/tree/master/utilities/SQLSSTT
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drilldown_searches:
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- name: View the detection results for - "$dest$" and "$process_name$"
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search: '%original_detection_search% | search dest = "$dest$" process_name = "$process_name$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$" and "$user$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$",
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"$user$") starthoursago=168 | stats count min(_time)
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as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message)
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as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all)
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as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics"
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by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: A command shell was spawned by sqlservr.exe on host $dest$ by user $user$. This may indicate unauthorized command execution.
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risk_objects:
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- field: dest
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type: system
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score: 90
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- field: user
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type: user
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score: 90
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threat_objects:
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- field: parent_process_name
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type: parent_process_name
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- field: process_name
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type: process_name
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tags:
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analytic_story:
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- SQL Server Abuse
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asset_type: Endpoint
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mitre_attack_id:
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- T1505.001
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: endpoint
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cve: []
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1505.001/simulation/sqlservr-windows_sysmon.log
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sourcetype: XmlWinEventLog
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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