mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
64 lines
2.9 KiB
YAML
64 lines
2.9 KiB
YAML
name: Detect Remote Access Software Usage URL
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id: 9296f515-073c-43a5-88ec-eda5a4626654
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version: 1
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date: '2024-02-22'
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author: Steven Dick
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status: production
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type: Anomaly
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description: The following analytic detects when a known remote access software is executed with the environment. Adversaries use these utilities to retain remote access capabilities to the environment. Utilities in the lookup include AnyDesk, GoToMyPC, LogMeIn, TeamViewer and much more. Review the lookup for the entire list and add any others.
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data_source: []
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search: '| tstats count min(_time) as firstTime max(_time) as lastTime latest(Web.http_method) as http_method latest(Web.http_user_agent) as http_user_agent latest(Web.url) as url latest(Web.user) as user latest(Web.dest) as dest from datamodel=Web by Web.action Web.src Web.category Web.url_domain
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `drop_dm_object_name("Web")`
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| lookup remote_access_software remote_domain AS url_domain OUTPUT isutility, description as signature, comment_reference as desc, category
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| search isutility = True
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| `detect_remote_access_software_usage_url_filter`'
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how_to_implement: The detection is based on data that originates from network logs. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the network logs. The logs must also be mapped to the `Web` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process.
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known_false_positives: It is possible that legitimate remote access software is used within the environment. Ensure that the lookup is reviewed and updated with any additional remote access software that is used within the environment.
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references:
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- https://attack.mitre.org/techniques/T1219/
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- https://thedfirreport.com/2022/08/08/bumblebee-roasts-its-way-to-domain-admin/
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- https://thedfirreport.com/2022/11/28/emotet-strikes-again-lnk-file-leads-to-domain-wide-ransomware/
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tags:
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analytic_story:
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- Insider Threat
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- Command And Control
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- Ransomware
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asset_type: Network
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confidence: 50
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impact: 50
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message: A domain for a known remote access software $url_domain$ was contacted by $src$.
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mitre_attack_id:
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- T1219
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observable:
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- name: src
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type: Hostname
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role:
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- Victim
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- name: user
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type: User
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role:
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- Victim
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- name: url_domain
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type: Hostname
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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.action
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- Web.src
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- Web.category
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- Web.url_domain
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risk_score: 25
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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/T1219/screenconnect/screenconnect_palo.log
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source: screenconnect_palo
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sourcetype: pan:threat |