mirror of
https://github.com/splunk/security_content
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Eric
77 lines
3.7 KiB
YAML
77 lines
3.7 KiB
YAML
name: Windows Modify Registry ProxyEnable
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id: b27f20bd-ef20-41d1-a1e9-25dedd5bf2f5
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version: 8
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date: '2025-05-02'
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author: Teoderick Contreras, Splunk
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status: production
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type: Anomaly
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data_source:
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- Sysmon EventID 13
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description:
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The following analytic detects modifications to the Windows registry
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key "ProxyEnable" to enable proxy settings. It leverages data from the Endpoint.Registry
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datamodel, specifically monitoring changes to the "Internet Settings\ProxyEnable"
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registry path. This activity is significant as it is commonly exploited by malware
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and adversaries to establish proxy communication, potentially connecting to malicious
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Command and Control (C2) servers. If confirmed malicious, this could allow attackers
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to redirect network traffic through a proxy, facilitating unauthorized communication
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and data exfiltration, thereby compromising the security of the affected host.
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search:
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'| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Registry where Registry.registry_path = "*\\Internet
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Settings\\ProxyEnable" Registry.registry_value_data = 0x00000001 by Registry.action
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Registry.dest Registry.process_guid Registry.process_id Registry.registry_hive Registry.registry_path
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Registry.registry_key_name Registry.registry_value_data Registry.registry_value_name
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Registry.registry_value_type Registry.status Registry.user Registry.vendor_product
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| `drop_dm_object_name(Registry)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `windows_modify_registry_proxyenable_filter`'
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how_to_implement:
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To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Registry` node. Also make sure
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that this registry was included in your config files ex. sysmon config to be monitored.
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known_false_positives:
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Administrators may enable or disable this feature that may
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cause some false positive, however is not common. Filter as needed.
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references:
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- https://malpedia.caad.fkie.fraunhofer.de/details/win.darkgate
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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:
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'| 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: the registry settings was modified to enable proxy on $dest$.
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risk_objects:
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- field: dest
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type: system
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score: 49
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threat_objects: []
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tags:
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analytic_story:
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- DarkGate Malware
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asset_type: Endpoint
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mitre_attack_id:
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- T1112
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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: endpoint
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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/T1112/proxy_enable/proxyenable.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog
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