Azure Sentinel
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Credentials were added to an application by UserA, after the application was granted admin consent rights by UserB
The Nobelium activity group has been observed adding credentials (x509 keys or password credentials) for one or more legitimate OAuth Applications or Service Principals, usually with existing Mail.Read or Mail.ReadWrite permissions, which grants the ability to read mail content from Exchange Online via Microsoft Graph or Outlook REST. Examples include mail archiving applications.
See Customer Guidance on Recent Nation-State Cyber Attacks for more on the Nobelium campaign (formerly known as Solorigate).
See Grant tenant-wide admin consent to an application for how to add admin consent to an application.
More Nobelium-related queries can be found listed under the See also section of this document.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://docs.microsoft.com/azure/active-directory/manage-apps/grant-admin-consent
The Nobelium activity group has been observed adding credentials (x509 keys or password credentials) for one or more legitimate OAuth Applications or Service Principals, usually with existing Mail.Read or Mail.ReadWrite permissions, which grants the ability to read mail content from Exchange Online via Microsoft Graph or Outlook REST. Examples include mail archiving applications.
See Customer Guidance on Recent Nation-State Cyber Attacks for more on the Nobelium campaign (formerly known as Solorigate).
See Grant tenant-wide admin consent to an application for how to add admin consent to an application.
More Nobelium-related queries can be found listed under the See also section of this document.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://docs.microsoft.com/azure/active-directory/manage-apps/grant-admin-consent
This query was originally published in the threat analytics report, ironSource PUA & unwanted apps impact millions.
IronSource provides software bundling tools for many popular legitimate apps, such as FileZilla. However, some of ironSource's bundling tools are considered PUA, because they exhibit potentially unwanted behavior. One component of these tools, detected by Microsoft as Prifou, silently transmits system information from the user. It also installs an outdated version of Chromium browser with various browser extensions, resets the user's home page, changes their search engine settings, and forces Chromium and itself to launch at startup.
The following query can be used to locate unique command-line strings used by ironSource bundlers to launch Prifou, as well as commands used by Prifou to install Chromium.
IronSource provides software bundling tools for many popular legitimate apps, such as FileZilla. However, some of ironSource's bundling tools are considered PUA, because they exhibit potentially unwanted behavior. One component of these tools, detected by Microsoft as Prifou, silently transmits system information from the user. It also installs an outdated version of Chromium browser with various browser extensions, resets the user's home page, changes their search engine settings, and forces Chromium and itself to launch at startup.
The following query can be used to locate unique command-line strings used by ironSource bundlers to launch Prifou, as well as commands used by Prifou to install Chromium.
This query visualises total emails with Phish detections over time summarizing the data daily by Phish detection technologies/controls used for detecting unknown-unique phish
Query 1 shows you any network communication happened from endpoints to a specific Remote IP or Remote URL.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
Microsoft has observed Bazacall using a renamed version of Rclone for data exfiltration.
'This hunting query identifies GitHub activites where a repo was changed from private to public that may be a sign of compromise.'
'IP addresses of broadband links that usually indicates users attempting to access their home network, for example for a remote session to a home computer.'
'This query detects modification in the AdminSDHolder in the Active Directory which could indicate an attempt for persistence.
AdminSDHolder Modification is a persistence technique in which an attacker abuses the SDProp process in Active Directory to establish a persistent backdoor to Active Directory.
This query searches for the event id 5136 where the Object DN is AdminSDHolder.
Ref: https://attack.stealthbits.com/adminsdholder-modification-ad-persistence'
AdminSDHolder Modification is a persistence technique in which an attacker abuses the SDProp process in Active Directory to establish a persistent backdoor to Active Directory.
This query searches for the event id 5136 where the Object DN is AdminSDHolder.
Ref: https://attack.stealthbits.com/adminsdholder-modification-ad-persistence'
'Identifies when a user account is created and then deleted within 10 minutes. This can be an indication of compromise and an adversary attempting to hide in the noise.'
Detects when there is a login attempt from a country that has not seen a successful login in the previous 14 days.
Threat actors may attempt to authenticate with credentials from compromised accounts - monitoring attempts from anomalous locations may help identify these attempts.
Authentication attempts should be investigated to ensure the activity was legitimate and if there is other similar activity.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins
Threat actors may attempt to authenticate with credentials from compromised accounts - monitoring attempts from anomalous locations may help identify these attempts.
Authentication attempts should be investigated to ensure the activity was legitimate and if there is other similar activity.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins
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