Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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MITRE Techniques
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KQL Query
To evade security software and analyst tools, Nobelium malware enumerates the target system looking for certain running processes, loaded drivers, and registry keys, with the goal of disabling them.
The Microsoft Defender for Endpoint sensor is one of the processes the malware attempts to disable.
Microsoft Defender for Endpoint has built-in protections against many techniques attackers use to disable endpoint sensors ranging from hardened OS protection, anti-tampering policies, and detections for a variety of tampering attempts, including "Attempt to stop Microsoft Defender for Endpoint sensor", "Tampering with Microsoft Defender for Endpoint sensor settings", or "Possible sensor tampering in memory".
Successfully disabling Microsoft Defender for Endpoint can prevent the system from reporting observed activities.
However, the multitude of signals reported into Microsoft Defender XDR provides a unique opportunity to hunt for systems where the tampering technique used might have been successful.
The following advanced hunting query can be used to locate devices that should be reporting but aren't:
The Microsoft Defender for Endpoint sensor is one of the processes the malware attempts to disable.
Microsoft Defender for Endpoint has built-in protections against many techniques attackers use to disable endpoint sensors ranging from hardened OS protection, anti-tampering policies, and detections for a variety of tampering attempts, including "Attempt to stop Microsoft Defender for Endpoint sensor", "Tampering with Microsoft Defender for Endpoint sensor settings", or "Possible sensor tampering in memory".
Successfully disabling Microsoft Defender for Endpoint can prevent the system from reporting observed activities.
However, the multitude of signals reported into Microsoft Defender XDR provides a unique opportunity to hunt for systems where the tampering technique used might have been successful.
The following advanced hunting query can be used to locate devices that should be reporting but aren't:
Device Network Events Involving Low Count FQDNs.
This query reduces network events to only those with the RemoteURL column populated,.
Then parses the DNS name from the URL (if needed) and finds the least prevalent.
FQDNs. The result is then joined with DeviceNetworkEvents to highlight anomalous.
Network communication.
This query reduces network events to only those with the RemoteURL column populated,.
Then parses the DNS name from the URL (if needed) and finds the least prevalent.
FQDNs. The result is then joined with DeviceNetworkEvents to highlight anomalous.
Network communication.
StrRAT is a Java-based remote access tool which steals browser credentials, logs keystrokes and take remote control of infected systems. It also has a module to download additional payload onto to the infected machine based on C2 server command. Additionally, this threat also has a ransomware encryption/decryption module which appends .crimson extension.
Description:.
The query looks for several different MITRE techniques, grouped by risk level.
A weighting is applied to each risk level and a total score calculated per machine.
Techniques can be added/removed as required.
The query looks for several different MITRE techniques, grouped by risk level.
A weighting is applied to each risk level and a total score calculated per machine.
Techniques can be added/removed as required.
This query uses the public MDE GitHub repo as a source to estimate the time that an agent build remains supported
based on the time it was uploaded. Please note that the timestamps used in this query are meant to estimate the
support period and will likely not represent the actual expiration of the package which will be based on the build.
If you would like an estimate of support, uncomment the extend statement to get an idea of what is \ is not
supported and an idea of how long support will remain for current agents.
This query currently only supports GA builds, not preview builds.
based on the time it was uploaded. Please note that the timestamps used in this query are meant to estimate the
support period and will likely not represent the actual expiration of the package which will be based on the build.
If you would like an estimate of support, uncomment the extend statement to get an idea of what is \ is not
supported and an idea of how long support will remain for current agents.
This query currently only supports GA builds, not preview builds.
'Provides the Security Intelligence version and total count of up to date devices, not up to date devices and count of devices whose status is not available relevant to the security intelligence version.'
Find Endpoints policies settings via compliance settings in the registry