![]() ![]() | extend timestamp = TimeGenerated, HostCustomEntity = Computer Uncomment the following line to alert only on interactive file download type | extend InteractiveFile = iif(Extension in (scriptExtensions), "Yes", "No") | extend Extension = strcat(".",split(File, ".")) | where RawData contains "Download failed and temporary file" New query (again, thanks to John Joyner for this): let scriptExtensions = dynamic() Update-OfflineAddressBook -Identity "Default Offline Address Book"Īfter you onboard the log file, you’ll need to modify the original detection rule because the data from the log is placed in a RAWDATA column. Set-Mailbox -Identity "OAB Gen 2" -Arbitration -OABGen $true -MaxSendSize 1GB New-Mailbox -Arbitration -Name "OAB Gen 2" -UserPrincipalName These commands restored OAB and the OABGeneratorLog folder was there. …The Exchange server had been upgraded and the OAB was broke. Thanks to John Joyner ( there’s a way to bring the OABGeneratorLog file back to life in the event it doesn’t exist for some reason… IF YOU DON’T SEE THE OABGeneratorLog file… During the wizard, name the new table http_proxy_oab_CL to match the Analytics Rule requirement. Make sure you are connected to the Exchange server through the file system so you can access C:\Program Files\Microsoft\Exchange Server\V15\Logging\OABGeneratorLog to include in the custom log setup wizard. ![]() Then go into the Advanced Settings of the Log Analytics Workspace for Azure Sentinel and setup custom log ingestion. To onboard the HTTPProxy AOBGeneratorLog, you need to enable (if it’s not already) the Security Events Data Connector in Azure Sentinel and install the Log Analytics agent on the Exchange server. Onboarding the Exchange HttpProxy AOBGeneratorLog Exchange Server 2010 (RU 31 for Service Pack 3 – this is a Defense in Depth update).Security updates are available for the following specific versions of Exchange: If you’re running Exchange on-premises, now is the time to patch. See: How to Deploy a Hunting Query to Azure Sentinel from the GitHub Repository Azure-Sentinel/PowerCatDownload.yaml at master.Azure-Sentinel/Invoke-PowerShellTcpOneLine.yaml at master.Azure-Sentinel/ExchangePowerShellSnapin.yaml at master.See: How to Deploy an Analytics Rule to Azure Sentinel from the GitHub Repository See how to do this below…īTW: All the above will be available in the Azure Sentinel console, i.e., the prod team is pushing these to all customerrs. You will need to onboard this log as a custom log under the table http_proxy_oab_CL before using this query. **One quick caveat with that last one (Suspicious File Downloads)…This query uses the Exchange HttpProxy AOBGeneratorLog. ![]()
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