SigmaHQ Detections
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6,797 detections
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Detects the creation of a specific file, 'inetmgr.exe', in the 'C:\Windows\ADFS\bg\' directory. This activity has been linked to the Onyx Sleet (also known as Andariel) APT group, particularly in the context of exploiting the TeamCity CVE-2023-42793 vulnerability.
Detects the use of the "apt" and "apt-get" commands to execute a shell or proxy commands. Such behavior may be associated with privilege escalation, unauthorized command execution, or to break out from restricted environments.
Detects access to the Okta password health report endpoint, which should only be accessed via the Okta Admin Console UI. This rule is intended for threat hunting to identify suspicious requests, especially when correlated with the absence of a corresponding admin console login. This activity was highlighted in the context of the Okta support incident in October 2023.
Detects exploitation attempts of CVE-2023-43261, an information disclosure vulnerability in Milesight UR5X, UR32L, UR32, UR35, UR41 routers before v35.3.0.7. Attackers can access sensitive router components, specifically the 'httpd.log' file, through proxy logs. This rule looks for GET requests to the '/lang/log/httpd.log' path with a successful HTTP status code (200).
Detects exploitation attempts of CVE-2023-43261, an information disclosure vulnerability in Milesight UR5X, UR32L, UR32, UR35, UR41 routers before v35.3.0.7. This vulnerability allows attackers to access sensitive router components by requesting the '/lang/log/httpd.log' file, which can contain passwords and other critical information.
Detects the creation of a scheduled task named '\Windows TeamCity Settings User Interface' with a specific content string 'uTYNkfKxHiZrx3KJ'. This activity has been linked to the Diamond Sleet APT group exploiting the TeamCity CVE-2023-42793 vulnerability for execution, persistence, and privilege escalation.
Detects the creation of temporary files by the ScreenConnect remote monitoring and management (RMM) tool in a specific user document directory. This behavior is associated with ScreenConnect's feature to remotely execute binaries on a target machine, where these binaries are first dropped to the specified temporary location before execution.
Detects the execution of "csc.exe" by the "w3wp.exe" process, specifically looking for patterns indicative of the MOVEit Transfer CVE-2023-34362 exploitation. This activity is associated with dynamic compilation of malicious DLL files within the .NET framework temporary ASP.NET files directory.
Detects execution of regsvr32 with the silent flag and no other flags on a DLL located in an uncommon or potentially suspicious location. When Regsvr32 is called in such a way, it implicitly calls the DLL export function 'DllRegisterServer'.
Detects when the DLL export function 'DllRegisterServer' is called in the commandline by Rundll32 explicitly where the DLL is located in a non-standard path. This behavior is often abused by adversaries to execute malicious DLLs for defense evasion.
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