mirror of
https://github.com/splunk/security_content
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Lou Stella
53 lines
2.0 KiB
YAML
53 lines
2.0 KiB
YAML
name: Splunk User Enumeration Attempt
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id: 25625cb4-1c4d-4463-b0f9-7cb462699cde
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version: 1
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date: '2022-04-29'
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author: Lou Stella, Splunk
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type: TTP
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datamodel: []
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description: On May 3rd, 2022, Splunk published a security advisory for username enumeration stemming from verbose login failure messages present on some REST endpoints. This detection will alert on attempted exploitation in patched versions of Splunk as well as actual exploitation in unpatched version of Splunk.
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search: ' `splunkd_failed_auths` | stats count(user) as auths by user, src | where auths>5 | stats values(user) as "Users", sum(auths) as TotalFailedAuths by src | `splunk_user_enumeration_attempt_filter`'
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how_to_implement: This detection does not require you to ingest any new data. The detection does require the ability to search the _audit index. This detection may assist in efforts to find password spraying or brute force authorization attempts in addition to someone enumerating usernames.
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known_false_positives: Automation executing authentication attempts against your Splunk infrastructure with outdated credentials may cause false positives.
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references:
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- https://www.splunk.com/en_us/product-security/announcements/svd-2022-0502.html
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tags:
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analytic_story:
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- Splunk Vulnerabilities
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asset_type: endpoint
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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: 80
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context:
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- Source:Endpoint
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cve:
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- CVE-2021-33845
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078/splunkd_auth/audittrail.log
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impact: 50
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kill_chain_phases:
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- Reconnaissance
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message: $TotalFailedAuths$ failed authentication events to Splunk from $src$ detected.
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mitre_attack_id:
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- T1078
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nist:
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- DE.CM
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observable:
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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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- user
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- src
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- info
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- action
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risk_score: 40
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security_domain: access
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