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https://github.com/splunk/security_content
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Michael Haag
69 lines
2.4 KiB
YAML
69 lines
2.4 KiB
YAML
name: Spring4Shell Payload URL Request
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id: 9d44d649-7d67-4559-95c1-8022ff49420b
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version: 1
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date: '2022-07-12'
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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 is static indicators related to CVE-2022-22963,
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Spring4Shell. The 3 indicators provide an amount of fidelity that source IP is attemping
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to exploit a web shell on the destination. The filename and cmd are arbitrary in
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this exploitation. Java will write a JSP to disk and a process will spawn from Java
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based on the cmd passed. This is indicative of typical web shell activity.
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data_source: []
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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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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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confidence: 60
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cve:
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- CVE-2022-22965
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impact: 60
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message: A URL was requested related to Spring4Shell POC code on $dest$ by $src$.
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mitre_attack_id:
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- T1505.003
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- T1505
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- T1190
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- T1133
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observable:
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- name: dest
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type: IP Address
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role:
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- Victim
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- name: src
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type: IP Address
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role:
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- Attacker
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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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required_fields:
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- _time
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- Web.http_method
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- Web.url
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- Web.url_length
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- Web.src
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- Web.dest
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- Web.http_user_agent
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risk_score: 36
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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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