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P4T12ICK
67 lines
2.2 KiB
YAML
67 lines
2.2 KiB
YAML
name: MSBuild Suspicious Spawned By Script Process
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id: 213b3148-24ea-11ec-93a2-acde48001122
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version: 1
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date: '2021-10-04'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: This analytic is to detect a suspicious child process of MSBuild spawned
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by Windows Script Host - cscript or wscript. This behavior or event are commonly
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seen and used by malware or adversaries to execute malicious msbuild process using
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malicious script in the compromised host. During triage, review parallel processes
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and identify any file modifications. MSBuild may load a script from the same path
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without having command-line arguments.
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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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ParentImage:
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- wscript.exe
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- cscript.exe
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selection2:
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OriginalFileName: MSBuild.exe
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selection3:
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Image|endswith: msbuild.exe
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condition: selection1 and selection2 and selection3
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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 should be limited as developers do not spawn
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MSBuild via a WSH.
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references:
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- https://app.any.run/tasks/dc93ee63-050c-4ff8-b07e-8277af9ab939/
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tags:
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analytic_story:
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- Trusted Developer Utilities Proxy Execution MSBuild
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asset_type: Endpoint
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confidence: 70
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impact: 70
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message: Msbuild.exe process spawned by $parent_process_name$ on $dest$ executed
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by $user$
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mitre_attack_id:
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- T1127.001
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- T1127
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observable:
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- name: dest
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type: Endpoint
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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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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: 49
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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/T1127.001/regsvr32_silent/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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