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| # Monkey365 - the PowerShell Cloud Security Tool for Azure and Microsoft 365 (copyright 2022) by Juan Garrido | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
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| function Get-MonkeyADAudit { | ||
| <# | ||
| .SYNOPSIS | ||
| Collector extract audit logs from Microsoft Entra ID | ||
| .DESCRIPTION | ||
| Collector extract audit logs from Microsoft Entra ID | ||
| .INPUTS | ||
| .OUTPUTS | ||
| .EXAMPLE | ||
| .NOTES | ||
| Author : Juan Garrido | ||
| Twitter : @tr1ana | ||
| File Name : Get-MonkeyADAudit | ||
| Version : 1.0 | ||
| .LINK | ||
| https://github.com/silverhack/monkey365 | ||
| #> | ||
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| [CmdletBinding()] | ||
| param( | ||
| [Parameter(Mandatory = $false,HelpMessage = "Background Collector ID")] | ||
| [string]$collectorId | ||
| ) | ||
| begin { | ||
| #Collector metadata | ||
| $monkey_metadata = @{ | ||
| Id = "aad0002"; | ||
| Provider = "EntraID"; | ||
| Resource = "EntraID"; | ||
| ResourceType = $null; | ||
| resourceName = $null; | ||
| collectorName = "Get-MonkeyADAudit"; | ||
| ApiType = "Graph"; | ||
| description = "Collector to extract audit logs from Microsoft Entra ID"; | ||
| Group = @( | ||
| "EntraID" | ||
| ); | ||
| Tags = @{ | ||
| "enabled" = $true | ||
| }; | ||
| Docs = "https://silverhack.github.io/monkey365/"; | ||
| ruleSuffixes = @( | ||
| "aad_audit_logs" | ||
| ); | ||
| dependsOn = @( | ||
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| ); | ||
| } | ||
| #Get Environment | ||
| $Environment = $O365Object.Environment | ||
| #Get Azure Active Directory Auth | ||
| $AADAuth = $O365Object.auth_tokens.Graph | ||
| #Set array | ||
| $formatted_events = @() | ||
| } | ||
| process { | ||
| $msg = @{ | ||
| MessageData = ($message.MonkeyGenericTaskMessage -f $collectorId,"audit",$O365Object.TenantID); | ||
| callStack = (Get-PSCallStack | Select-Object -First 1); | ||
| logLevel = 'info'; | ||
| InformationAction = $InformationAction; | ||
| Tags = @('AzureGraphAuditLog'); | ||
| } | ||
| Write-Information @msg | ||
| try { | ||
| $enabled = [System.Convert]::ToBoolean($O365Object.internal_config.entraId.auditLog.enabled) | ||
| $DaysAgo = "{0:s}" -f (Get-Date).AddDays($O365Object.internal_config.entraId.auditLog.AuditLogDaysAgo) + "Z" | ||
| } | ||
| catch { | ||
| $enabled = $false | ||
| $DaysAgo = -15 | ||
| } | ||
| $Query = 'activityDate gt {0}' -f $DaysAgo | ||
| if ($enabled) { | ||
| #Get audit log | ||
| $params = @{ | ||
| Authentication = $AADAuth; | ||
| ObjectType = 'activities/audit'; | ||
| Filter = $Query | ||
| Environment = $Environment; | ||
| ContentType = 'application/json'; | ||
| Method = "GET"; | ||
| APIVersion = "beta"; | ||
| InformationAction = $O365Object.InformationAction; | ||
| Verbose = $O365Object.Verbose; | ||
| Debug = $O365Object.Debug; | ||
| } | ||
| #Get Audit Logs from Azure AAD | ||
| $all_events = Get-MonkeyGraphObject @params | ||
| #format events | ||
| if ($all_events) { | ||
| $msg = @{ | ||
| MessageData = ($message.MonkeyResponseCountMessage -f $all_events.Count); | ||
| callStack = (Get-PSCallStack | Select-Object -First 1); | ||
| logLevel = 'info'; | ||
| InformationAction = $InformationAction; | ||
| Tags = @('AzureGraphAuditLogCount'); | ||
| } | ||
| Write-Information @msg | ||
| #Iterate over all events | ||
| foreach ($entry in $all_events) { | ||
| $entry.actor = $entry.actor.userPrincipalName | ||
| $entry | Add-Member -Type NoteProperty -Name targetResourceType -Value $entry.targets.targetResourceType | ||
| $entry | Add-Member -Type NoteProperty -Name targetobjectId -Value $entry.targets.objectId | ||
| $entry | Add-Member -Type NoteProperty -Name targetName -Value $entry.targets.Name | ||
| $entry | Add-Member -Type NoteProperty -Name targetUserPrincipalName -Value $entry.targets.userPrincipalName | ||
| $Changes = $entry.targets.modifiedProperties | ||
| $entry | Add-Member -Type NoteProperty -Name ChangeAttribute -Value (@($Changes.Name) -join ',') | ||
| $entry | Add-Member -Type NoteProperty -Name OldValue -Value (@($Changes.oldvalue) -join ',') | ||
| $entry | Add-Member -Type NoteProperty -Name NewValue -Value (@($Changes.newvalue) -join ',') | ||
| $formatted_events += $entry | ||
| } | ||
| } | ||
| } | ||
| } | ||
| end { | ||
| if ($formatted_events) { | ||
| $formatted_events = $formatted_events | Select-Object $AADConfig.AuditLogFilter | ||
| $formatted_events.PSObject.TypeNames.Insert(0,'Monkey365.AzureAAD.AuditLogs') | ||
| [pscustomobject]$obj = @{ | ||
| Data = $formatted_events; | ||
| Metadata = $monkey_metadata; | ||
| } | ||
| $returnData.aad_audit_logs = $obj | ||
| } | ||
| else { | ||
| $msg = @{ | ||
| MessageData = ($message.MonkeyEmptyResponseMessage -f "Audit Log",$O365Object.TenantID); | ||
| callStack = (Get-PSCallStack | Select-Object -First 1); | ||
| logLevel = "verbose"; | ||
| InformationAction = $O365Object.InformationAction; | ||
| Tags = @('AzureGraphUsersEmptyResponse'); | ||
| Verbose = $O365Object.Verbose; | ||
| } | ||
| Write-Verbose @msg | ||
| } | ||
| } | ||
| } | ||
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