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Nasreddine Bencherchali
11c909f725
* Add YAML formatting and validation infrastructure - Add yamlfmt configuration (.yamlfmt) with 4-space indent, LF line endings - Add yamllint configuration (.yamllint) for syntax validation (detections/ only) - Add pre-commit hook for automatic YAML formatting - Add CI validation script with unified error output - Add GitHub Actions workflow for PR validation - Add documentation for setup and usage - Support custom yamlfmt binary path via --yamlfmt-path flag * comment yaml check from pre-commit * apply yamlfmt * Update yaml-validation.yml * Update yaml-validation.yml * application folder search formatting * cloud folder search formatting * web folder search formatting * network folder search formatting * endpoint folder search formatting * resolve first conflict * apply formatting * remove additional pipe * Update README.md * update versions * restore and update formatting (#3920) --------- Co-authored-by: Bhavin Patel <bhavin.j.patel91@gmail.com>
65 lines
3.5 KiB
YAML
65 lines
3.5 KiB
YAML
name: Spring4Shell Payload URL Request
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id: 9d44d649-7d67-4559-95c1-8022ff49420b
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version: 7
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date: '2026-02-25'
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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: The following analytic detects attempts to exploit the Spring4Shell vulnerability (CVE-2022-22963) by identifying specific URL patterns associated with web shell payloads. It leverages web traffic data, focusing on HTTP GET requests with URLs containing indicators like "tomcatwar.jsp," "poc.jsp," and "shell.jsp." This activity is significant as it suggests an attacker is trying to deploy a web shell, which can lead to remote code execution. If confirmed malicious, this could allow the attacker to gain persistent access, execute arbitrary commands, and potentially escalate privileges within the compromised environment.
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data_source:
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- Nginx Access
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search: |-
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| tstats count FROM datamodel=Web
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WHERE Web.http_method IN ("GET") Web.url IN ("*tomcatwar.jsp*","*poc.jsp*","*shell.jsp*")
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BY Web.http_user_agent Web.http_method, Web.url,Web.url_length
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Web.src, Web.dest sourcetype
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| `drop_dm_object_name("Web")`
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `spring4shell_payload_url_request_filter`
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how_to_implement: To successfully implement this search you need to be ingesting information on Web traffic that include fields relavent for traffic into the `Web` datamodel.
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known_false_positives: The jsp file names are static names used in current proof of concept code. =
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references:
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- https://www.microsoft.com/security/blog/2022/04/04/springshell-rce-vulnerability-guidance-for-protecting-against-and-detecting-cve-2022-22965/
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- https://github.com/TheGejr/SpringShell
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- https://www.tenable.com/blog/spring4shell-faq-spring-framework-remote-code-execution-vulnerability
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drilldown_searches:
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- name: View the detection results for - "$dest$"
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search: '%original_detection_search% | search dest = "$dest$"'
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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 - "$dest$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" 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 URL was requested related to Spring4Shell POC code on $dest$ by $src$.
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risk_objects:
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- field: dest
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type: system
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score: 36
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threat_objects:
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- field: src
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type: ip_address
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tags:
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analytic_story:
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- Spring4Shell CVE-2022-22965
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asset_type: Web Server
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cve:
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- CVE-2022-22965
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mitre_attack_id:
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- T1133
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- T1190
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- T1505.003
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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: network
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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/T1190/spring4shell/spring4shell_nginx.log
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source: /var/log/nginx/access.log
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sourcetype: nginx:plus:kv
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