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patel-bhavin
70 lines
2.5 KiB
YAML
70 lines
2.5 KiB
YAML
name: Web Spring Cloud Function FunctionRouter
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id: 89dddbad-369a-4f8a-ace2-2439218735bc
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version: 1
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date: '2022-04-05'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Web
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description: The following analytic identifies activity related to the web application Spring Cloud Function that was recently idenfied as vulnerable. This is CVE-2022-22963.
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Multiple proof of concept code was released.
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The URI that is hit includes `functionrouter`. The specifics of the exploit include a status of 500. In this query we did not include it, but for filtering you can add Web.status=500.
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The exploit data itself (based on all the POCs) is located in the form_data field. This field will include all class.modules being called.
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search: '| tstats count from datamodel=Web where Web.http_method IN ("POST") Web.url="*/functionRouter*"
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by Web.http_user_agent Web.http_method, Web.url,Web.url_length Web.src, Web.dest Web.status 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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| `web_spring_cloud_function_functionrouter_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: False positives may be present with legitimate applications. Attempt to filter by dest IP or use Asset groups to restrict to servers.
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references:
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- https://github.com/rapid7/metasploit-framework/pull/16395
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- https://github.com/hktalent/spring-spel-0day-poc
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tags:
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analytic_story:
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- Spring4Shell CVE-2022-22965
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cve:
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- CVE-2022-22963
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asset_type: Web Server
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 60
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context:
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- Scope:Network
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1190/spring4shell/all_functionrouter_http_streams.log
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impact: 70
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kill_chain_phases:
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- Exploitation
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message: A suspicious URL has been requested against $dest$ by $src$, related to a vulnerability in Spring Cloud.
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mitre_attack_id:
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- T1190
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nist:
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- DE.CM
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observable:
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- name: dest
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type: Hostname
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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: 42
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security_domain: network
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