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https://github.com/splunk/security_content
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Eric
93 lines
4.7 KiB
YAML
93 lines
4.7 KiB
YAML
name: Office Spawning Control
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id: 053e027c-10c7-11ec-8437-acde48001122
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version: 12
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date: '2025-02-10'
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author: Michael Haag, Splunk
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status: removed
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type: TTP
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description: The following analytic has been deprecated. The following analytic identifies
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instances where `control.exe` is spawned by a Microsoft Office product. It leverages
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data from Endpoint Detection and Response (EDR) agents, focusing on process and
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parent process relationships. This activity is significant because it can indicate
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exploitation attempts related to CVE-2021-40444, where `control.exe` is used to
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execute malicious .cpl or .inf files. If confirmed malicious, this behavior could
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allow an attacker to execute arbitrary code, potentially leading to system compromise,
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data exfiltration, or further lateral movement within the network.
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data_source:
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- Sysmon EventID 1
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- Windows Event Log Security 4688
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- CrowdStrike ProcessRollup2
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where Processes.parent_process_name
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IN ("winword.exe","excel.exe","powerpnt.exe","mspub.exe","visio.exe","wordpad.exe","wordview.exe","onenote.exe","onenotem.exe","onenoteviewer.exe","onenoteim.exe","msaccess.exe")
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Processes.process_name=control.exe by Processes.dest Processes.user Processes.parent_process_name
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Processes.parent_process Processes.process_name Processes.process Processes.process_id
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Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`|
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`security_content_ctime(lastTime)`| `office_spawning_control_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection
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and Response (EDR) agents. These agents are designed to provide security-related
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telemetry from the endpoints where the agent is installed. To implement this search,
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you must ingest logs that contain the process GUID, process name, and parent process.
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Additionally, you must ingest complete command-line executions. These logs must
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be processed using the appropriate Splunk Technology Add-ons that are specific to
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the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
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data model. Use the Splunk Common Information Model (CIM) to normalize the field
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names and speed up the data modeling process.
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known_false_positives: Limited false positives should be present.
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references:
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- https://strontic.github.io/xcyclopedia/library/control.exe-1F13E714A0FEA8887707DFF49287996F.html
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- https://app.any.run/tasks/36c14029-9df8-439c-bba0-45f2643b0c70/
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- https://attack.mitre.org/techniques/T1218/011/
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- https://www.echotrail.io/insights/search/control.exe/
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- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.002/T1218.002.yaml
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- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/trojanized-onenote-document-leads-to-formbook-malware/
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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: '| 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: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ clicking a suspicious attachment.
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risk_objects:
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- field: dest
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type: system
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score: 80
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threat_objects:
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- field: parent_process_name
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type: parent_process_name
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- field: process_name
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type: process_name
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tags:
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analytic_story:
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- Spearphishing Attachments
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- Microsoft MSHTML Remote Code Execution CVE-2021-40444
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- Compromised Windows Host
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asset_type: Endpoint
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cve:
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- CVE-2021-40444
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mitre_attack_id:
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- T1566.001
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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:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1566.001/macro/windows-sysmon_control.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog
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