CSEC_PUBLIC/WELA
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update

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fukusuket
2025-03-14 18:02:21 +09:00
parent e286e5666f
commit bce8f13efd
1 changed files with 29 additions and 3 deletions
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32
WELA.ps1
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@@ -43,7 +43,8 @@ foreach ($rule in $jsonContent) {
$rules = $jsonContent
# Step 4: Count the number of usable and unusable rules for each level
$usableSecRules = $rules | Where-Object { $_.applicable -eq $true }
$usableSecRules = $rules | Where-Object { $_.applicable -eq $true -and $_.channel -eq "sec" }
$usablePwshRules = $rules | Where-Object { $_.applicable -eq $true -and $_.channel -eq "pwsh" }
$unusableRules = $rules | Where-Object { $_.applicable -eq $false }
$totalCounts = $rules | Group-Object -Property level | ForEach-Object {
@@ -60,6 +61,14 @@ $usableSecCounts = $usableSecRules | Group-Object -Property level | ForEach-Obje
}
}
$usablePwshCounts = $usablePwshRules | Group-Object -Property level | ForEach-Object {
[PSCustomObject]@{
Level = $_.Name
Count = $_.Count
}
}
# Step 5: Calculate the percentages
$usableSecPercentages = $usableSecCounts | ForEach-Object {
$total = ($totalCounts | Where-Object Level -match $PSItem.Level | Select-Object -ExpandProperty Count)[0]
@@ -71,19 +80,36 @@ $usableSecPercentages = $usableSecCounts | ForEach-Object {
}
}
$usablePwshPercentages = $usablePwshCounts | ForEach-Object {
$total = ($totalCounts | Where-Object Level -match $PSItem.Level | Select-Object -ExpandProperty Count)[0]
[PSCustomObject]@{
Level = $PSItem.Level
UsableCount = $PSItem.Count
TotalCount = $total
Percentage = "{0:N2}" -f ($PSItem.Count / $total * 100)
}
}
# Step 6: Generate the required outputtotal
$customOrder = @("critical", "high", "medium", "low", "informational")
Write-Output "Detection rules that can be used on this system versus total possible rules:"
Write-Output "Security event log detection rules:"
$usableSecPercentages = $usableSecPercentages | Sort-Object { $customOrder.IndexOf($_.Level) }
$usableSecPercentages | ForEach-Object {
Write-Output "$($_.Level) rules: $($_.UsableCount) / $($_.TotalCount) ($($_.Percentage)%)"
}
Write-Output "PowerShell event log detection rules:"
$usablePwshPercentages = $usablePwshPercentages | Sort-Object { $customOrder.IndexOf($_.Level) }
$usablePwshPercentages | ForEach-Object {
Write-Output "$($_.Level) rules: $($_.UsableCount) / $($_.TotalCount) ($($_.Percentage)%)"
}
Write-Output ""
Write-Output "Usable detection rules list saved to: UsableRules.csv"
Write-Output "Unusable detection rules list saved to: UnusableRules.csv"
Write-Output ""
$totalUsable = ($usableSecPercentages | Measure-Object -Property UsableCount -Sum).Sum
$totalUsable = ($usableSecPercentages + $usablePwshPercentages| Measure-Object -Property UsableCount -Sum).Sum
$totalRulesCount = ($totalCounts | Measure-Object -Property Count -Sum).Sum
$utilizationPercentage = "{0:N2}" -f (($totalUsable / $totalRulesCount) * 100)
Write-Output "You can utilize $utilizationPercentage% of your detection rules."