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* Add detection links for scripts * Add detection links for OtherMSBins. Fixed and updated as needed. * Add detection links for MSBins. Fixed and updated as needed. * Add detection links for oslibraries * Updating template for Detections * Removing empty Detection:Sigma entries * Remove redundant blank line * Replacing commit URL with file URL Co-authored-by: root <root@DESKTOP-5CR935D.localdomain> Co-authored-by: Wietze <wietze@users.noreply.github.com>
35 lines
2.1 KiB
YAML
35 lines
2.1 KiB
YAML
---
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Name: Eventvwr.exe
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Description: Displays Windows Event Logs in a GUI window.
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Author: 'Jacob Gajek'
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Created: 2018-11-01
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Commands:
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- Command: eventvwr.exe
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Description: During startup, eventvwr.exe checks the registry value HKCU\Software\Classes\mscfile\shell\open\command for the location of mmc.exe, which is used to open the eventvwr.msc saved console file. If the location of another binary or script is added to this registry value, it will be executed as a high-integrity process without a UAC prompt being displayed to the user.
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Usecase: Execute a binary or script as a high-integrity process without a UAC prompt.
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Category: UAC bypass
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Privileges: User
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MitreID: T1548.002
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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Full_Path:
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- Path: C:\Windows\System32\eventvwr.exe
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- Path: C:\Windows\SysWOW64\eventvwr.exe
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Code_Sample:
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- Code: https://github.com/enigma0x3/Misc-PowerShell-Stuff/blob/master/Invoke-EventVwrBypass.ps1
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Detection:
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- Sigma: https://github.com/SigmaHQ/sigma/blob/b08b3e2b0d5111c637dbede1381b07cb79f8c2eb/rules/windows/process_creation/process_creation_sysmon_uac_bypass_eventvwr.yml
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- Sigma: https://github.com/SigmaHQ/sigma/blob/b08b3e2b0d5111c637dbede1381b07cb79f8c2eb/rules/windows/registry_event/registry_event_uac_bypass_eventvwr.yml
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- Elastic: https://github.com/elastic/detection-rules/blob/d31ea6253ea40789b1fc49ade79b7ec92154d12a/rules/windows/privilege_escalation_uac_bypass_event_viewer.toml
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- Splunk: https://github.com/splunk/security_content/blob/86a5b644a44240f01274c8b74d19a435c7dae66e/detections/endpoint/eventvwr_uac_bypass.yml
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- IOC: eventvwr.exe launching child process other than mmc.exe
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- IOC: Creation or modification of the registry value HKCU\Software\Classes\mscfile\shell\open\command
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Resources:
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- Link: https://enigma0x3.net/2016/08/15/fileless-uac-bypass-using-eventvwr-exe-and-registry-hijacking/
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- Link: https://github.com/enigma0x3/Misc-PowerShell-Stuff/blob/master/Invoke-EventVwrBypass.ps1
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Acknowledgement:
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- Person: Matt Nelson
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Handle: '@enigma0x3'
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- Person: Matt Graeber
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Handle: '@mattifestation'
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---
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