Azure Sentinel
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This query visualises the total amount of emails subject to an admin policy with action of allow, independent of action taken, summarizing the data by type of override
'This query looks for unfamiliar Sign-in's thats not seen recently for the given user
with azure portal login attempts and audit logs to help detect and reduce the analysis timeline for defenders'
with azure portal login attempts and audit logs to help detect and reduce the analysis timeline for defenders'
'This hunting query will help detect successful sign-ins from devices that are marked non-compliant along with bulk download activity.
Attackers may attempt to get a list of accounts, groups, registration details within an environment which could help in follow-on behavior.
Best practice is to block sign ins from non-complaint devices, however if allowed monitor these events to ensure they do not lead to other risky activity.
Reference: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-devices#non-compliant-device-sign-in'
Attackers may attempt to get a list of accounts, groups, registration details within an environment which could help in follow-on behavior.
Best practice is to block sign ins from non-complaint devices, however if allowed monitor these events to ensure they do not lead to other risky activity.
Reference: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-devices#non-compliant-device-sign-in'
'Looks for multiple users that had their admin role removed by a single user within a certain period.
The default threshold is 5 removals, this can be edited in the query.'
The default threshold is 5 removals, this can be edited in the query.'
'This query searches for failed attempts to log in from more than 15 various users within a 5 minute timeframe from the same source. This is a potential indication of a password spray attack
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimAuthentication)'
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimAuthentication)'
Listing Email Remediation Actions performed via Explorer in Defender for Office 365
Graph of MDO detections trended over time
'Any Alerts that fired related to a given IpAddress during the range of +6h and -3d'
Snip3 is a family of related remote access trojans. Although the malware in this family contain numerous small variations, they all exhibit similar behaviors and techniques.
The following query looks for a function call to a method named DetectSandboxie. This method is used in RevengeRAT and AsyncRAT instances involved in a campaign targeting the aviation industry, first observed in 2021. It has also been associated in the past other malware, such as WannaCry and QuasarRAT. Individual PowerShell functions can be detected in the same way in some instances, though care should be taken to ensure that the command name is unique -- otherwise, this query may return many false positives.
The following query looks for a function call to a method named DetectSandboxie. This method is used in RevengeRAT and AsyncRAT instances involved in a campaign targeting the aviation industry, first observed in 2021. It has also been associated in the past other malware, such as WannaCry and QuasarRAT. Individual PowerShell functions can be detected in the same way in some instances, though care should be taken to ensure that the command name is unique -- otherwise, this query may return many false positives.
This query was originally published in the threat analytics report, Ryuk ransomware. There is also a related blog.
Ryuk is human-operated ransomware. Much like DoppelPaymer ransomware, Ryuk is spread manually, often on networks that are already infected with Trickbot.
During the earliest stages of a Ryuk infection, an operator downloads Cobalt Strike, a penetration testing kit that is also used by malicious actors. Cobalt Strike is used by Ryuk operators to explore the network before deploying the Ryuk payload. This malicious behavior is often obscured by Base64 encoding and other tricks.
The following query detects possible invocation of Cobalt Strike using Windows Management Instrumentation (WMI).
The See also section below lists links to other queries associated with Ryuk ransomware.
References:
https://www.microsoft.com/security/blog/2020/03/05/human-operated-ransomware-attacks-a-preventable-disaster/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Ryuk&threatId=-2147232689
https://www.microsoft.com/security/blog/2020/03/05/human-operated-ransomware-attacks-a-preventable-disaster/
https://www.cobaltstrike.com/
https://docs.microsoft.com/windows/win32/wmisdk/wmi-start-page
Ryuk is human-operated ransomware. Much like DoppelPaymer ransomware, Ryuk is spread manually, often on networks that are already infected with Trickbot.
During the earliest stages of a Ryuk infection, an operator downloads Cobalt Strike, a penetration testing kit that is also used by malicious actors. Cobalt Strike is used by Ryuk operators to explore the network before deploying the Ryuk payload. This malicious behavior is often obscured by Base64 encoding and other tricks.
The following query detects possible invocation of Cobalt Strike using Windows Management Instrumentation (WMI).
The See also section below lists links to other queries associated with Ryuk ransomware.
References:
https://www.microsoft.com/security/blog/2020/03/05/human-operated-ransomware-attacks-a-preventable-disaster/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Ryuk&threatId=-2147232689
https://www.microsoft.com/security/blog/2020/03/05/human-operated-ransomware-attacks-a-preventable-disaster/
https://www.cobaltstrike.com/
https://docs.microsoft.com/windows/win32/wmisdk/wmi-start-page
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