mirror of
https://github.com/splunk/security_content
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Eric
75 lines
3.3 KiB
YAML
75 lines
3.3 KiB
YAML
name: Spring4Shell Payload URL Request
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id: 9d44d649-7d67-4559-95c1-8022ff49420b
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version: 6
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date: '2025-05-02'
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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
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(CVE-2022-22963) by identifying specific URL patterns associated with web shell
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payloads. It leverages web traffic data, focusing on HTTP GET requests with URLs
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containing indicators like "tomcatwar.jsp," "poc.jsp," and "shell.jsp." This activity
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is significant as it suggests an attacker is trying to deploy a web shell, which
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can lead to remote code execution. If confirmed malicious, this could allow the
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attacker to gain persistent access, execute arbitrary commands, and potentially
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escalate privileges within the compromised environment.
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data_source:
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- Nginx Access
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search: '| tstats count from datamodel=Web where Web.http_method IN ("GET") Web.url
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IN ("*tomcatwar.jsp*","*poc.jsp*","*shell.jsp*") by Web.http_user_agent Web.http_method,
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Web.url,Web.url_length Web.src, Web.dest sourcetype | `drop_dm_object_name("Web")`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `spring4shell_payload_url_request_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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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
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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 ("$dest$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `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:
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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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