Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects suspicious activities associated with ysoserial.net gadget chain exploitation targeting SharePoint's w3wp.exe process. The rule correlates the loading of specific .NET assemblies (PresentationFramework, System.Xaml, System.Data.Services) with the subsequent execution of command shells (cmd, powershell) or the presence of common ysoserial.net-related strings (ActivitySurrogateSelector, LosFormatter) within command lines originating from the w3wp.exe process, indicating a potential web shell.
Detects activity associated with the SharePoint ToolShell exploitation chain, specifically monitoring the w3wp.exe process for spawning suspicious child processes like cmd.exe or powershell.exe, and the creation of unexpected .aspx files within the SharePoint LAYOUTS directory.
This rule identifies MikroTik devices running vulnerable versions of RouterOS (specifically those older than 7.24) that are susceptible to CVE-2026-84411. This vulnerability involves an integer underflow in the web management HTTP handling, which can lead to unauthenticated remote code execution or denial of service.
The following analytic identifies instances where CrushFTP has blocked access due to exceeding the maximum number of simultaneous connections from a single IP address. This activity may indicate brute force attempts, credential stuffing, or automated attacks against the CrushFTP server. This detection is particularly relevant following the discovery of CVE-2025-31161, an authentication bypass vulnerability in CrushFTP versions 10.0.0 through 10.8.3 and 11.0.0 through 11.3.0.
Detects potential exploitation of AI agent frameworks, such as Semantic Kernel, where plugin or tool invocation primitives are abused to execute arbitrary commands or manipulate files via path traversal. The rule monitors for AI-hosting processes (e.g., python.exe, node.exe) spawning shell child processes or file-related commands containing path traversal sequences (e.g., '..\..\') paired with file operation keywords.
Detects network traffic attempting to exploit CVE-2021-33044, an authentication bypass vulnerability in Dahua NetKeyboard devices, by identifying specific login request strings used in the exploit chain.
This rule detects malicious HTTP POST requests attempting a path traversal attack against Grav CMS, specifically targeting the __unique_form_id__ parameter. The rule looks for directory traversal sequences ('..') following the parameter, which is characteristic of attempts to read sensitive files outside the intended web directory.
This rule detects malicious HTTP POST requests attempting a path traversal attack against Grav CMS, specifically targeting the __unique_form_id__ parameter. The rule looks for directory traversal sequences ('..') following the parameter, which is characteristic of attempts to read sensitive files outside the intended web directory.
Detects anomalous Telnet (TCP port 23) traffic associated with Mirai-variant botnet propagation, such as scanning for new targets or inbound compromise attempts, often following cPanel/WHM vulnerabilities.
Detects Heartbleed (CVE-2014-0160) exploitation attempts by monitoring for malformed TLS heartbeat requests (undersized payload) followed by oversized responses from the server that indicate potential memory disclosure.
Detects SQL injection exploitation attempts against MOVEit Transfer targeting the CVE-2023-34362 vulnerability, followed by the deployment and subsequent interaction with the 'human2.aspx' webshell associated with Cl0p ransomware mass-exploitation campaigns.
Detects evidence of a SharePoint pre-authentication RCE exploit chain where an adversary injects a malicious Namespace containing an ExpandedWrapper-wrapped XamlServices payload (e.g., ObjectDataProvider or LosFormatter gadget) into the w3wp.exe worker process. This specifically looks for command-line arguments indicative of deserialization-based exploit attempts targeting SharePoint web server components.
Detects attempts to perform path traversal attacks against the MikroTik RouterOS WebFig interface via the jsproxy endpoint. The rule monitors HTTP proxy traffic for directory traversal sequences (e.g., '../' or URL encoded equivalents) within the query parameters of requests directed to the jsproxy URI.
Detects HTTP requests directed at edge appliances (FortiOS/FortiProxy, SonicWall, Cisco ASA) that match known CVE-associated URI paths, alongside successful administrative authentication to management or VPN interfaces originating from external source IP addresses. This rule is designed to identify potential initial access via vulnerability exploitation or unauthorized administrative login to critical infrastructure.
Detects the SharePoint application pool worker process (w3wp.exe) spawning command-line interpreters or scripting engines. This behavior is indicative of post-exploitation activity where an attacker, having gained remote code execution via techniques like insecure deserialization, executes commands or deploys in-memory webshells within the context of the IIS worker process.
Detects unauthorized attempts to access SharePoint's WebPartPage ToolPane and Gallery endpoints via anonymous web requests. This pattern, characterized by the 'DisplayMode=Design' query parameter and suspicious markup in the request body, is indicative of exploitation attempts targeting vulnerable SharePoint installations to execute arbitrary code or bypass authentication mechanisms.
Detects automated API exploitation attempts, specifically Broken Object Level Authorization (BOLA) scanning. The rule triggers when a single source IP or API token exhibits high-frequency request patterns (5+ requests per second) against resource endpoints with sequentially incrementing IDs. It specifically correlates a spike in 401/403 authorization failures followed by a small count of 200 successes, indicating a potential successful bypass of authorization controls.
Detects anomalous child process execution from SharePoint's w3wp.exe worker process following the loading of suspicious .NET assemblies (PresentationFramework.dll, System.Xaml.dll, System.Data.Services.dll). This behavior is indicative of a post-exploitation stage for SharePoint SafeControls bypass vulnerabilities, where a gadget chain is utilized to execute unmanaged or child processes.
Detects suspicious HTTP requests directed at SharePoint applications containing a malformed Register directive. The rule identifies attempts to leverage the 'publishingribbon' Tagprefix combined with unauthorized namespaces (e.g., System.Xaml, System.Windows.Data) to bypass the EditingPageParser.InitializeRegisterTable safelist check, a common technique for SharePoint remote code execution.
Detects Log4Shell (CVE-2021-44228) exploitation attempts by identifying JNDI lookup patterns (e.g., ldap://, rmi://, dns://) and common obfuscation techniques within HTTP headers, user-agents, and query parameters, which could lead to remote code execution.
Detects high-frequency HTTP requests targeting Salesforce Aura endpoints associated with structural introspection, such as retrieving component definitions or field metadata. This behavior is consistent with the use of the AuraInspector reconnaissance tool to map the internal structure of a Salesforce application.
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