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P4T12ICK
68 lines
2.4 KiB
YAML
68 lines
2.4 KiB
YAML
name: SLUI RunAs Elevated
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id: 8d124810-b3e4-11eb-96c7-acde48001122
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version: 1
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date: '2021-05-13'
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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 the Microsoft Software Licensing User
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Interface Tool, `slui.exe`, elevating access using the `-verb runas` function. This
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particular bypass utilizes a registry key/value. Identified by two sources, the
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registry keys are `HKCU\Software\Classes\exefile\shell` and `HKCU\Software\Classes\launcher.Systemsettings\Shell\open\command`.
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To simulate this behavior, multiple POC are available. The analytic identifies the
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use of `runas` by `slui.exe`.
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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: slui.exe
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selection2:
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CommandLine: '*runas*'
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selection3:
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CommandLine: '*-verb*'
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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.
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known_false_positives: Limited false positives should be present as this is not commonly
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used by legitimate applications.
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references:
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- https://www.exploit-db.com/exploits/46998
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- https://mattharr0ey.medium.com/privilege-escalation-uac-bypass-in-changepk-c40b92818d1b
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- https://gist.github.com/r00t-3xp10it/0c92cd554d3156fd74f6c25660ccc466
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- https://www.rapid7.com/db/modules/exploit/windows/local/bypassuac_sluihijack/
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- https://www.mandiant.com/resources/shining-a-light-on-darkside-ransomware-operations
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tags:
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analytic_story:
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- DarkSide Ransomware
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- Windows Defense Evasion Tactics
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asset_type: Endpoint
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confidence: 90
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impact: 70
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message: A slui process $process_name$ with elevated commandline $process$ in host
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$dest$
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mitre_attack_id:
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- T1548.002
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- T1548
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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: Hostname
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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: 63
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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/T1548.002/slui/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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