Azure Sentinel
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'Identifies if an AV scan finds infected files in Azure App Services.'
'Extracts MDATP Alerts that indicate a command was executed by a web shell. Uses time window based querying to idneitfy the potential web shell location on the server, then enriches with Attacker IP and User Agent'
This query was originally published in the threat analytics report, Ransomware continues to hit healthcare, critical services. There is also a related blog.
In April of 2020, security researchers observed multiple ransomware campaigns using the same set of techniques.
The following query detects attempts to stop System Restore, which would prevent the user from recovering data by going back to a restore point.
The See also section below lists more queries related to techniques shared by these campaigns.
Reference - https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
In April of 2020, security researchers observed multiple ransomware campaigns using the same set of techniques.
The following query detects attempts to stop System Restore, which would prevent the user from recovering data by going back to a restore point.
The See also section below lists more queries related to techniques shared by these campaigns.
Reference - https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
This query was originally published in the threat analytics report, EvilQuest signals the rise of Mac ransomware.
As of the time of this writing (October 2020), ransomware designed to target macOS is relatively rare. EvilQuest is one of the few examples of this kind of malware on the platform.
The query below can detect the creation of a ransom note according to the typical methods of EvilQuest operators. The command the query searches for is associated with, but not definitely indicative of, EvilQuest infections.
Other queries related to EvilQuest ransomware can be found under the See also section below.
As of the time of this writing (October 2020), ransomware designed to target macOS is relatively rare. EvilQuest is one of the few examples of this kind of malware on the platform.
The query below can detect the creation of a ransom note according to the typical methods of EvilQuest operators. The command the query searches for is associated with, but not definitely indicative of, EvilQuest infections.
Other queries related to EvilQuest ransomware can be found under the See also section below.
Bazacall uses malicious macro-enabled Excel documents to execute their payload.
'This query identifies matches based on domain IOCs related to KNOTWEED against Microsoft Defender for Endpoint device network connections'
Original Sigma Rule: https://github.com/Neo23x0/sigma/blob/master/rules/apt/apt_oceanlotus_registry.yml.
Questions via Twitter: @janvonkirchheim.
Questions via Twitter: @janvonkirchheim.
This query was originally published in the threat analytics report, Doppelpaymer: More human-operated ransomware. There is also a related blog.
DoppelPaymer is ransomware that is spread manually by human operators. These operators have exhibited extensive knowledge of system administration and common network security misconfigurations. They often use stolen credentials from over-privileged service accounts to turn off security software, run malicious commands, and spread malware throughout an organization. More specifically, they use common remote execution tools, such as PsExec, to move laterally and distribute ransomware.
The following query detects suspicious usage of PsExec to create files on a remote device.
The See also section below lists links to other queries associated with DoppelPaymer.
References:
https://msrc-blog.microsoft.com/2019/11/20/customer-guidance-for-the-dopplepaymer-ransomware/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Trojan:Win32/DoppelPaymer!MTB&threatId=-2147205372
https://docs.microsoft.com/sysinternals/downloads/psexec
DoppelPaymer is ransomware that is spread manually by human operators. These operators have exhibited extensive knowledge of system administration and common network security misconfigurations. They often use stolen credentials from over-privileged service accounts to turn off security software, run malicious commands, and spread malware throughout an organization. More specifically, they use common remote execution tools, such as PsExec, to move laterally and distribute ransomware.
The following query detects suspicious usage of PsExec to create files on a remote device.
The See also section below lists links to other queries associated with DoppelPaymer.
References:
https://msrc-blog.microsoft.com/2019/11/20/customer-guidance-for-the-dopplepaymer-ransomware/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Trojan:Win32/DoppelPaymer!MTB&threatId=-2147205372
https://docs.microsoft.com/sysinternals/downloads/psexec
This query shows the source of the AV detections (e.g., the website the file was downloaded from etc.).
Get the list of AV detections.
Get the list of AV detections.
This query was originally published in the threat analytics report, OSX/SurfBuyer adware campaign.
It will return results if a shell script has furtively attempted to decode and save a file to a /tmp folder.
If discovered on your system, this kind of activity might be associated with SurfBuyer, which is adware that installs a browser extension to take control of several major web browsers, including Safari, Google Chrome, and Firefox.
It will return results if a shell script has furtively attempted to decode and save a file to a /tmp folder.
If discovered on your system, this kind of activity might be associated with SurfBuyer, which is adware that installs a browser extension to take control of several major web browsers, including Safari, Google Chrome, and Firefox.
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