Azure Sentinel
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This hunting query looks for hosts exporting a mailbox from an on-prem Exchange server, followed by
that same host removing the export within a short time window. This pattern has been observed by attackers
when exfiltrating emails from a target environment. A Mailbox export is unlikely to be a common command run so look for
activity from unexpected hosts and accounts.
Reference: https://www.volexity.com/blog/2020/12/14/dark-halo-leverages-solarwinds-compromise-to-breach-organizations/
Query insprired by Azure Sentinel detection https://github.com/Azure/Azure-Sentinel/blob/master/Hunting%20Queries/SecurityEvent/HostExportingMailboxAndRemovingExport.yaml
that same host removing the export within a short time window. This pattern has been observed by attackers
when exfiltrating emails from a target environment. A Mailbox export is unlikely to be a common command run so look for
activity from unexpected hosts and accounts.
Reference: https://www.volexity.com/blog/2020/12/14/dark-halo-leverages-solarwinds-compromise-to-breach-organizations/
Query insprired by Azure Sentinel detection https://github.com/Azure/Azure-Sentinel/blob/master/Hunting%20Queries/SecurityEvent/HostExportingMailboxAndRemovingExport.yaml
'This hunting query identifies GitHub activites where permissions are updated that may be a sign of compromise.'
'This query detects authentication attempt from a fake computer account(username ends with $).
Computer accounts are normally not authenticating via interactive logon or remote desktop neither they are unlocking the systems.
Ref: https://blog.menasec.net/2019/02/threat-hunting-6-hiding-in-plain-sights.html'
Computer accounts are normally not authenticating via interactive logon or remote desktop neither they are unlocking the systems.
Ref: https://blog.menasec.net/2019/02/threat-hunting-6-hiding-in-plain-sights.html'
'Example query for SigninLogs showing how to break out packed fields. In this case extending conditional access Policies '
'This query looks for file hashes and AV signatures associated with Prestige ransomware payload.'
'Dev-0530 actors are known to encrypt the contents of the victims device as well as renaming the file extensions. This query looks for the creation of files with .h0lyenc extension or presence of ransom note.'
'Identifies if an AV scan fails in Azure App Services.'
'Finds attempts to list users or groups using the built-in Windows 'net' tool '
Bazacall malware uses emails that contain a phone number for the user to call in order to cancel a fake subscription. These emails contain no links or attachments, and use automatic payment lures to trick users into contacting the number included in the email.
Microsoft has observed attackers who have gained entry to an environment via the Log4J vulnerability utilizing identifiable strings in PowerShell commands.
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