CSEC_PUBLIC/WELA
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update

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fukusuket
2025-03-14 23:21:56 +09:00
parent 3663f14ebc
commit d25d5ddc3d
1 changed files with 30 additions and 37 deletions
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67
WELA.ps1
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@@ -34,6 +34,30 @@ function Get-RuleCounts {
}
}
function CalculatePercentages {
param ($counts, $totalCounts)
$counts | 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 / $total * 100)
}
}
}
function DisplayRulePercentages {
param ($usablePercentages, $msg)
Write-Output $msg
$customOrder = @("critical", "high", "medium", "low", "informational")
$usablePercentages = $usablePercentages | Sort-Object { $customOrder.IndexOf($_.Level) }
$usablePercentages | ForEach-Object {
Write-Output "$($_.Level) rules: $($_.UsableCount) / $($_.TotalCount) ($($_.Percentage)%)"
}
Write-Output ""
}
# Set the console encoding to UTF-8
[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
@@ -51,7 +75,6 @@ $logo = @"
by Yamato Security
"@
Write-Host $logo -ForegroundColor Green
# Step 3: Get the applicable rules
@@ -64,50 +87,20 @@ $unusableRules = $rules | Where-Object { $_.applicable -eq $false -and $_.channe
$totalCounts = Get-RuleCounts -rules $rules
$usableSecCounts = Get-RuleCounts -rules $usableSecRules
$usablePwshCounts = Get-RuleCounts -rules $usablePwshRules
$usablePwsCounts = Get-RuleCounts -rules $usablePwshRules
# Step 5: Calculate the percentages
$usableSecPercentages = $usableSecCounts | 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)
}
}
$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)
}
}
$usableSecPercentages = CalculatePercentages -counts $usableSecCounts -totalCounts $totalCounts
$usablePwsPercentages = CalculatePercentages -counts $usablePwsCounts -totalCounts $totalCounts
# Step 6: Generate the required outputtotal
$customOrder = @("critical", "high", "medium", "low", "informational")
Write-Output "Security event log detection rules:"
$usableSecPercentages = $usableSecPercentages | Sort-Object { $customOrder.IndexOf($_.Level) }
$usableSecPercentages | ForEach-Object {
Write-Output "$($_.Level) rules: $($_.UsableCount) / $($_.TotalCount) ($($_.Percentage)%)"
}
DisplayRulePercentages -usablePercentages $usableSecPercentages -msg "Security event log detection rules:"
DisplayRulePercentages -usablePercentages $usablePwsPercentages -msg "PowerShell event log detection rules:"
Write-Output ""
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 + $usablePwshPercentages| Measure-Object -Property UsableCount -Sum).Sum
$totalUsable = ($usableSecPercentages + $usablePwsPercentages| 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."