Azure Sentinel
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'This query look for accounts that have not been successfully logged into recently who then add or update an MFA method before logging in.
Threat actors may look to re-activate dormant accounts and use them for access by adding MFA methods in the hope that changes to such dormant accounts may go un-noticed. This query uses the Microsoft Sentinel UEBA features.
Ref: [LINK TO BLOG]'
Threat actors may look to re-activate dormant accounts and use them for access by adding MFA methods in the hope that changes to such dormant accounts may go un-noticed. This query uses the Microsoft Sentinel UEBA features.
Ref: [LINK TO BLOG]'
This query will find when a new credential is added to an application or service principal.
The Nobelium activity group was able to gain sufficient access to add credentials to existing applications with mail read permissions. They used that access to exfiltrate email.
See Customer Guidance on Recent Nation-State Cyber Attacks for more on the Nobelium campaign (formerly known as Solorigate).
Additional information on OAuth Credential Grants can be found in RFC 6749 Section 4.4 or Microsoft Entra ID audit activity reference.
For further information on AuditLogs please see Microsoft Entra ID audit activity reference.
This query was inspired by an Azure Sentinel detection.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://docs.microsoft.com/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow
https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-audit-activities
https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/NewAppOrServicePrincipalCredential.yaml
The Nobelium activity group was able to gain sufficient access to add credentials to existing applications with mail read permissions. They used that access to exfiltrate email.
See Customer Guidance on Recent Nation-State Cyber Attacks for more on the Nobelium campaign (formerly known as Solorigate).
Additional information on OAuth Credential Grants can be found in RFC 6749 Section 4.4 or Microsoft Entra ID audit activity reference.
For further information on AuditLogs please see Microsoft Entra ID audit activity reference.
This query was inspired by an Azure Sentinel detection.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://docs.microsoft.com/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow
https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-audit-activities
https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/NewAppOrServicePrincipalCredential.yaml
Background Intelligent Transfer Service (BITS) is a way to reliably download files from webservers or SMB servers.
This service is commonly used for legitimate purposes, but can also be used as part of a malware downloader.
Additionally, bitsadmin can be used to upload files and therefore can be used for data exfiltration. This
query will identify use of bitsadmin.exe for either purpose and will identify directionality file transfer
directionality.
This service is commonly used for legitimate purposes, but can also be used as part of a malware downloader.
Additionally, bitsadmin can be used to upload files and therefore can be used for data exfiltration. This
query will identify use of bitsadmin.exe for either purpose and will identify directionality file transfer
directionality.
' The query below identifies creation of unusual identity by the Europium actor to mimic Microsoft Exchange Health Manager Service account using Exchange PowerShell commands
Reference: https://www.microsoft.com/security/blog/2022/09/08/microsoft-investigates-iranian-attacks-against-the-albanian-government/'
Reference: https://www.microsoft.com/security/blog/2022/09/08/microsoft-investigates-iranian-attacks-against-the-albanian-government/'
In this detection, we track emails with suspicious keywords in subjects.
This query finds a software by name and/or version
Intent:
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
"This query searches for any files in Cloud App Events that have trigger a security alert."
'This hunting query looks for users who have multiple failed queries in a short space of time.'
This query looks for persistence or priviledge escalation done using Windows Accessibility features.
It covers some of the techniques that could be used to utilize these features for malicious purposes,.
Including attaching a debugger using a registry config or overwriting these files.
Note: some developers might use such hacks for all sort of troubleshooting and testing purposes,.
But this better be prohibited, as it allows any account with access to the machine to run processes as SYSTEM.
Read more here: https://attack.mitre.org/wiki/Technique/T1015.
Tags: #AccessibilityFeatures, #StickyKeys, #ImageFileExecutionOptions, #Debugger, #PriviledgeEscalation, #Persistence.
It covers some of the techniques that could be used to utilize these features for malicious purposes,.
Including attaching a debugger using a registry config or overwriting these files.
Note: some developers might use such hacks for all sort of troubleshooting and testing purposes,.
But this better be prohibited, as it allows any account with access to the machine to run processes as SYSTEM.
Read more here: https://attack.mitre.org/wiki/Technique/T1015.
Tags: #AccessibilityFeatures, #StickyKeys, #ImageFileExecutionOptions, #Debugger, #PriviledgeEscalation, #Persistence.
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