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P4T12ICK
74 lines
2.4 KiB
YAML
74 lines
2.4 KiB
YAML
name: Windows MSIExec Spawn Discovery Command
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id: e9d05aa2-32f0-411b-930c-5b8ca5c4fcee
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version: 1
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date: '2022-06-13'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: The following analytic identifies MSIExec spawning multiple discovery
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commands, including spawning Cmd.exe or PowerShell.exe. Typically, child processes
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are not common from MSIExec other than MSIExec spawning itself.
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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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Image|endswith:
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- powershell.exe
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- cmd.exe
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- nltest.exe
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- ipconfig.exe
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- systeminfo.exe
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ParentImage: msiexec.exe
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condition: selection1
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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: False positives will be present with MSIExec spawning Cmd or
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PowerShell. Filtering will be needed. In addition, add other known discovery processes
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to enhance query.
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references:
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- https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.007/T1218.007.md
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tags:
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analytic_story:
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- Windows System Binary Proxy Execution MSIExec
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asset_type: Endpoint
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confidence: 50
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impact: 70
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ running different discovery commands.
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mitre_attack_id:
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- T1218.007
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observable:
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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: 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 Name
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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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risk_score: 35
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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/T1218.007/atomic_red_team/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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update_timestamp: true
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