Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
146 detections
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Search for dropping of files to Windows/Program Files fodlers by non-priviledged processes
Detects attempts to create a DLL file to a known desktop application dependencies folder such as Slack, Teams or OneDrive and by an unusual process. This may indicate an attempt to load a malicious module via DLL search order hijacking.
Detects exploitation attempt of privilege escalation vulnerability via SetupComplete.cmd and PartnerSetupComplete.cmd described in CVE-2019-1378
Detects a "regsvr32" execution where the DLL doesn't contain a common file extension.
Detects using register-cimprovider.exe to execute arbitrary dll file.
Detects the addition of the "Debugger" value to the "DbgManagedDebugger" key in order to achieve persistence. Which will get invoked when an application crashes
Detects a suspicious printer driver installation with an empty Manufacturer value
Detects a "regsvr32" execution where the DLL doesn't contain a common file extension.
Detects the addition of the "Debugger" value to the "DbgManagedDebugger" key in order to achieve persistence. Which will get invoked when an application crashes
Detects a suspicious printer driver installation with an empty Manufacturer value
Detect DLL deletions from Spooler Service driver folder. This might be a potential exploitation attempt of CVE-2021-1675
The query digs in Windows print spooler drivers folder for any file creations,
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Suspicious DLL is load from Spooler Service backup folder.
This behavior is used from PoC Exploit of CVE-2021-34527, CVE-2021-1675 or CVE-2022-21999.
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Suspicious DLL is load from Spooler Service backup folder.
This behavior is used from PoC Exploit of CVE-2021-34527, CVE-2021-1675 or CVE-2022-21999.
This query is using the locations where malicious DLL images are often loaded from by regsvr32.dll and rundll32.exe.
Blog:
https://threathunt.blog/dll-image-loads-from-suspicious-locations-by-regsvr32-exe-rundll32-exe/
Blog:
https://threathunt.blog/dll-image-loads-from-suspicious-locations-by-regsvr32-exe-rundll32-exe/
'This query looks for changes to COM registry keys to point to files in C:\Windows\System32\spool\drivers\color\.
This can be used to enable COM hijacking for persistence.
Ref: https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/'
This can be used to enable COM hijacking for persistence.
Ref: https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/'
'This query looks for writes of PE files to C:\Windows\System32\spool\drivers\color\.
This is a common directory used by malware, as well as some legitimate programs, and writes of PE files to the folder should be monitored.
Ref: https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/'
This is a common directory used by malware, as well as some legitimate programs, and writes of PE files to the folder should be monitored.
Ref: https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/'
This rule detects the launch of processes whose executable files are identified as malicious by Google Safe Browsing and exhibit low prevalence within the environment. Specifically, it looks for process launch events where the SHA256 hash of the executable matches a hash flagged as 'CRITICAL' severity by Google Safe Browsing. Additionally, the rule filters for executables that have been observed on a maximum of 3 distinct machines over a 10-day rolling period, indicating low prevalence and a higher likelihood of being a targeted or novel threat.
Detects suspicious DLL loads by the Windows Print Spooler service from its backup driver folders. This behavior is indicative of exploitation attempts related to vulnerabilities like PrintNightmare (CVE-2021-1675, CVE-2021-34527) where an attacker can force the spooler service to load arbitrary DLLs, leading to privilege escalation or remote code execution.
This rule detects attempts to exploit the PrintNightmare vulnerability (CVE-2021-1675) by monitoring for DLL deletions within the Windows Spooler Service driver folder. Specifically, it looks for `spoolsv.exe` deleting files in `C:\Windows\System32\spool\drivers\x64\3\`, which is a common indicator of this exploit.
This rule detects the creation or modification of AppX packages in suspicious file system locations. Adversaries may place malicious AppX packages in common temporary or public directories to evade detection or achieve persistence. The rule specifically looks for Event ID 854 from the 'appxdeployment-server' service, indicating an AppX package being added to the processing pipeline, and checks if the package's path contains known suspicious locations such as public user directories, temporary folders, or desktop/downloads folders.
Detects the execution of the 'execve_hijack' component of the Triple Cross eBPF rootkit. This specific file is used by the rootkit to elevate privileges by hijacking the 'execve' system call, often in conjunction with the 'sudo' command.
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