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P4T12ICK
65 lines
2.4 KiB
YAML
65 lines
2.4 KiB
YAML
name: System Info Gathering Using Dxdiag Application
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id: f92d74f2-4921-11ec-b685-acde48001122
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version: 1
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date: '2021-11-19'
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author: Teoderick Contreras, Splunk
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status: production
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type: Hunting
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description: This analytic is to detect a suspicious dxdiag.exe process command-line
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execution. Dxdiag is used to collect the system info of the target host. This technique
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has been used by Remcos RATS, various actors, and other malware to collect information
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as part of the recon or collection phase of an attack. This behavior should rarely
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be seen in a corporate network, but this command line can be used by a network administrator
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to audit host machine specifications. Thus in some rare cases, this detection will
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contain false positives in its results. To triage further, analyze what commands
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were passed after it pipes out the result to a file for further processing.
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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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OriginalFileName: dxdiag.exe
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selection2:
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Image|endswith: dxdiag.exe
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selection3:
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CommandLine: '* /t *'
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condition: (selection1 or 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` and `Filesystem`
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node. In addition, confirm the latest CIM App 4.20 or higher is installed and the
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latest TA for the endpoint product.
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known_false_positives: This commandline can be used by a network administrator to
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audit host machine specifications. Thus, a filter is needed.
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references:
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- https://app.any.run/tasks/df0baf9f-8baf-4c32-a452-16562ecb19be/
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tags:
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analytic_story:
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- Remcos
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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: dxdiag.exe process with commandline $process$ on $dest$
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mitre_attack_id:
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- T1592
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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: 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: 25
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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/t1592/host_info_dxdiag/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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