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|
function Search-AuditLog {
param(
[Parameter(Mandatory)]
[string]$LogRoot,
[string[]]$Keywords = @("Remove-", "Stop-", "Delete", "Drop", "Format"),
[datetime]$StartDate,
[datetime]$EndDate,
[string]$UserFilter,
[int]$ContextLines = 3
)
$files = Get-ChildItem -Path $LogRoot -Recurse -Filter "*.txt" -File
if ($StartDate) {
$files = $files | Where-Object { $_.LastWriteTime -ge $StartDate }
}
if ($EndDate) {
$files = $files | Where-Object { $_.LastWriteTime -le $EndDate }
}
Write-Host "扫描 $($files.Count) 个审计日志文件..." -ForegroundColor Cyan
$findings = @()
$pattern = ($Keywords | ForEach-Object { [regex]::Escape($_) }) -join "|"
foreach ($file in $files) {
$lines = Get-Content $file.FullName -Encoding UTF8
$userLine = $lines | Where-Object { $_ -match "^Username:" } | Select-Object -First 1
$fileUser = if ($userLine -match "Username:\s*(.+)") {
$Matches[1].Trim()
} else {
"Unknown"
}
if ($UserFilter -and $fileUser -notlike "*$UserFilter*") {
continue
}
for ($i = 0; $i -lt $lines.Count; $i++) {
if ($lines[$i] -match $pattern) {
$start = [Math]::Max(0, $i - $ContextLines)
$end = [Math]::Min($lines.Count - 1, $i + $ContextLines)
$context = ($lines[$start..$end] | Where-Object { $_ }) -join "`n"
$findings += [PSCustomObject]@{
File = $file.FullName
User = $fileUser
LineNum = $i + 1
Match = $lines[$i].Trim()
Context = $context
Timestamp = $file.LastWriteTime
}
}
}
}
Write-Host "发现 $($findings.Count) 条敏感操作记录" `
-ForegroundColor $(if ($findings.Count -gt 0) { "Yellow" } else { "Green" })
return $findings
}
function New-AuditSummaryReport {
param(
[Parameter(Mandatory)]
[object[]]$Findings,
[string]$OutputPath = "C:\Reports\AuditSummary.html"
)
$reportDir = Split-Path $OutputPath -Parent
New-Item $reportDir -ItemType Directory -Force | Out-Null
$byUser = $Findings | Group-Object -Property User | Sort-Object Count -Descending
$byKeyword = foreach ($f in $Findings) {
foreach ($kw in @("Remove-", "Stop-", "Delete", "Drop")) {
if ($f.Match -match [regex]::Escape($kw)) {
[PSCustomObject]@{ Keyword = $kw; Match = $f.Match }
}
}
} | Group-Object -Property Keyword | Sort-Object Count -Descending
$html = @"
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title>审计摘要报告</title>
<style>
body{font-family:'Segoe UI',sans-serif;margin:20px;background:#f5f6fa}
h1{color:#2d3436;border-bottom:2px solid #e74c3c}
h2{color:#2d3436;margin-top:30px}
table{width:100%;border-collapse:collapse;margin:10px 0}
th{background:#0984e3;color:white;padding:10px;text-align:left}
td{padding:8px 10px;border-bottom:1px solid #dfe6e9}
.summary{display:flex;gap:15px;margin:15px 0}
.card{background:white;border-radius:8px;padding:15px;box-shadow:0 2px 4px rgba(0,0,0,0.1)}
.card .value{font-size:24px;font-weight:bold}
</style></head><body>
<h1>审计摘要报告</h1>
<p>生成时间：$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')</p>
<div class="summary">
<div class="card"><div class="value" style="color:#e74c3c">$($Findings.Count)</div><div>敏感操作总数</div></div>
<div class="card"><div class="value" style="color:#0984e3">$($byUser.Count)</div><div>涉及用户</div></div>
</div>
<h2>按用户统计</h2><table><tr><th>用户</th><th>操作次数</th></tr>
$($byUser | ForEach-Object { "<tr><td>$($_.Name)</td><td>$($_.Count)</td></tr>" })
</table>
<h2>按操作类型统计</h2><table><tr><th>关键字</th><th>次数</th></tr>
$($byKeyword | ForEach-Object { "<tr><td>$($_.Name)</td><td>$($_.Count)</td></tr>" })
</table></body></html>
"@
$html | Set-Content $OutputPath -Encoding UTF8
Write-Host "审计报告已生成：$OutputPath" -ForegroundColor Green
}
$results = Search-AuditLog -LogRoot "C:\Logs\PowerShell\Transcripts" `
-Keywords @("Remove-", "Stop-", "Delete") `
-StartDate (Get-Date).AddDays(-7)
if ($results) {
New-AuditSummaryReport -Findings $results
}
|