70 lines
2.6 KiB
Markdown
70 lines
2.6 KiB
Markdown
# DeepWhite
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Detective safelisting using Sysmon event logs.
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Parses the Sysmon event logs, grabbing the SHA256 hashes from process creation (event 1), driver load (event 6, sys), and image load (event 7, DLL) events.
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## VirusTotal and Safelisting setup
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Setting up VirusTotal hash submissions and safelisting:
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The hash checker requires Post-VirusTotal:
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- https://github.com/darkoperator/Posh-VirusTotal
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It also requires a VirusTotal API key:
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- https://www.virustotal.com/en/documentation/public-api/
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Then configure your VirusTotal API key:
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```powershell
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set-VTAPIKey -APIKey <API Key>
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```
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The script assumes a personal API key, and waits 15 seconds between submissions.
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## Sysmon setup
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Sysmon is required: https://docs.microsoft.com/en-us/sysinternals/downloads/sysmon
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Must log the SHA256 hash, DeepWhite will ignore the others.
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This minimal Sysmon 6.0 config will log the proper events/hashes. Note that image (DLL) logging may create performance issues. This config ignores DLLs signed by Microsoft (which should lighten the load), but please test!
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```xml
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<Sysmon schemaversion="3.3">
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<!-- Capture SHA256 hashes only -->
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<HashAlgorithms>SHA256</HashAlgorithms>
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<EventFiltering>
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<!-- Log all drivers (.sys) except if the signature contains Microsoft or Windows -->
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<DriverLoad onmatch="exclude">
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<Signature condition="contains">microsoft</Signature>
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<Signature condition="contains">windows</Signature>
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</DriverLoad>
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<!-- Log all images (.dll) except if the signature contains Microsoft or Windows -->
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<!-- Note: this may create a performance issue, please test -->
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<ImageLoad onmatch="exclude">
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<Signature condition="contains">microsoft</Signature>
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<Signature condition="contains">windows</Signature>
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</ImageLoad>
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<!-- Do not log process termination -->
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<ProcessTerminate onmatch="include" />
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<!-- Log process creation -->
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<ProcessCreate onmatch="exclude" />
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</EventFiltering>
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</Sysmon>
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```
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These are the events used by DeepBlueCLI and DeepWhite.
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You can go *much* further than this with Sysmon. The Sysinternals Sysmon page has a good basic configuration: https://docs.microsoft.com/en-us/sysinternals/downloads/sysmon
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Also see @swiftonsecurity's awesome Sysmon config here: https://github.com/SwiftOnSecurity/sysmon-config
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## Generating a Safelist
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Generate a custom safelist on Windows (note: this is optional):
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```
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PS C:\> Get-ChildItem c:\windows\system32 -Include '*.exe','*.dll','*.sys','*.com' -Recurse | Get-FileHash| Export-Csv -Path safelist.csv
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```
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Note: this will generate (harmless) 'PermissionDenied' warnings for locked files, etc. They may be ignored.
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