PowerShell

When a new 0-day vulnerability or a suspicious file hash is identified, waiting for a scheduled scan is not an option. This PowerShell tool utilizes the SentinelOne Management API to “scrape” the entire fleet for specific indicators of compromise (IOCs). 1. The Workflow The script performs the following steps: Authentication: Connects via API Token to the S1 Management Console. Query: Requests a list of all endpoints where a specific file hash or process has been detected in the last 24 hours. Reporting: Generates a CSV list of infected Hostnames, IP addresses, and the “Detection State” (Mitigated vs. Active). 2. The Implementation # S1 API Configuration $ApiToken = "YOUR_API_TOKEN" $BaseUrl = "[https://your-console.sentinelone.net/web/api/v2.1](https://your-console.sentinelone.net/web/api/v2.1)" $Header = @{ "Authorization" = "Token $ApiToken" } # Define the Threat Hash to hunt for $TargetHash = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855" # Search for the hash across the site $Response = Invoke-RestMethod -Uri "$BaseUrl/threats?contentHashes=$TargetHash" -Method Get -Headers $Header if ($Response.data) { Write-Host "ALERT: Threat detected on $($Response.data.count) endpoints!" -ForegroundColor Red $Response.data | Select-Object computerName, lastActiveDate, threatName | Export-Csv -Path "./ThreatReport.csv" } else { Write-Host "Clear: No matches found for the target hash." -ForegroundColor Green }

Stale accounts are a primary vector for lateral movement in a compromised network. This script automates the “Sanitization” phase of identity management by identifying and disabling dormant accounts. 1. The Logic Flow The script follows a safe-failure logic to ensure no critical service accounts are accidentally disabled: Targeting: Narrowly scopes the search to specific User OUs. Evaluation: Filters for LastLogonDate older than 90 days. Action: Disables the account and logs the event for auditing. 2. The Implementation # Configuration $DaysInactive = -90 $TargetDate = (Get-Date).AddDays($DaysInactive) $LogPath = "C:\Logs\AD_Cleanup_$(Get-Date -Format 'yyyyMMdd').log" # Fetch and Process Get-ADUser -Filter 'LastLogonDate -lt $TargetDate -and Enabled -eq $true' -Properties LastLogonDate | ForEach-Object { $User = $_.SamAccountName try { # Use -WhatIf for safety during testing Disable-ADAccount -Identity $_.DistinguishedName -ErrorAction Stop Add-Content -Path $LogPath -Value "SUCCESS: Disabled $User (Last Login: $($_.LastLogonDate))" } catch { Add-Content -Path $LogPath -Value "ERROR: Failed to disable $User. Check permissions." } }

Script Overview This script scans the ‘Users’ OU and disables accounts that haven’t logged in for 90 days. # Get inactive users $date = (Get-Date).AddDays(-90) Get-ADUser -Filter 'LastLogonDate -lt $date' | Disable-ADAccount Note: Always run this in -WhatIf mode first!