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pyth0n1c
90 lines
3.5 KiB
YAML
90 lines
3.5 KiB
YAML
name: Office Spawning Control
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id: 053e027c-10c7-11ec-8437-acde48001122
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version: 1
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date: '2021-09-08'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: The following detection identifies control.exe spawning from an office
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product. This detection identifies any Windows Office Product spawning `control.exe`.
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In malicious instances, the command-line of `control.exe` will contain a file path
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to a .cpl or .inf, related to CVE-2021-40444. In this instance, we narrow our detection
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down to the Office suite as a parent process. During triage, review all file modifications.
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Capture and analyze any artifacts on disk. review parallel and child processes to
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identify further suspicious behavior
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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")
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Processes.process_name=control.exe by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`|
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`office_spawning_control_filter`'
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how_to_implement: 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 `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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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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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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confidence: 100
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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cve:
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- CVE-2021-40444
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dataset:
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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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impact: 80
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kill_chain_phases:
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- Exploitation
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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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mitre_attack_id:
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- T1566
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- T1566.001
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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: parent_process_name
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type: Process
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role:
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- Parent Process
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- name: process_name
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type: Process
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role:
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- Child Process
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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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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.original_file_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_path
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- Processes.process_path
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- Processes.parent_process_id
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risk_score: 80
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security_domain: endpoint
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supported_tas:
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- Splunk_TA_microsoft_sysmon
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asset_type: Endpoint
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