Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects inbound HTTP requests containing JNDI lookup strings commonly used to exploit the Log4Shell vulnerability (CVE-2021-44228). The rule specifically monitors for JNDI lookups over ldap, rmi, or dns protocols within HTTP traffic, which can lead to remote code execution.
Detects network requests originating from common package manager User-Agents (e.g., pip, npm, cargo) targeted at external domains that do not match known legitimate repositories. This behavior is indicative of potential command and control (C2) activity or malicious package staging using lookalike or arbitrary domains to bypass standard package registry traffic patterns.
This rule detects network traffic directed at 'goldsky.arweave.net', a domain known to be used by the TukTuk malware as a dead-drop resolver. Adversaries often use legitimate web services like Arweave to host command-and-control (C2) configuration data, such as secondary C2 IP addresses or domains, allowing them to redirect infected hosts to backend infrastructure while masking the traffic as legitimate web communication.
Detects HTTP GET requests to a specific file path (docs.zip) on the Ukrainian government website (drs.gov.ua), identified as an activity associated with the Turla threat group's STOCKSTAY malware component.
This rule detects HTTP POST requests containing a Content-Length header value indicating a body size exceeding 10MB. Large POST requests may indicate data exfiltration, large file uploads, or misuse of HTTP channels for data transfer to external destinations.
Detects incoming HTTP requests to Microsoft Exchange servers containing malicious X-AnonResource-Backend or X-BEResource headers, which are indicative of an attempt to exploit the ProxyLogon SSRF vulnerability (CVE-2021-26855).
Detects HTTP traffic patterns associated with default Cobalt Strike malleable C2 profiles, specifically identifying requests to /submit.php or /dpixel and the use of the default 'Mozilla/4.0 (compatible; MSIE 8.0;' User-Agent string.
Detects attempts to exploit Apache Struts vulnerabilities by identifying OGNL (Object-Graph Navigation Language) expressions (starting with %{ or ${) within the Content-Type HTTP header, combined with requests to .action or .do endpoints.
Detects attempts to exploit the ProxyShell vulnerability (CVE-2021-34473) in Microsoft Exchange servers. The rule identifies malicious path traversal sequences, specifically utilizing encoding techniques like double URL encoding (%25) or dot-dot-slash characters within requests to the Autodiscover service, aimed at bypassing security controls.
Detects outbound HTTP POST requests with specific URI patterns (/rob/ or /ins/) that are indicative of TrickBot malware command and control (C2) check-in activity.
This rule detects large HTTP POST requests (greater than 10MB) originating from the internal network to external destinations, which may indicate bulk data exfiltration.
Detects network exploitation attempts related to the Log4j vulnerability (CVE-2021-44228), where an adversary sends an HTTP request containing a JNDI lookup string (e.g., ldap://, rmi://, dns://) designed to trigger a remote code execution via vulnerable Log4j libraries.
Detects HTTP POST requests containing patterns associated with the Spring4Shell vulnerability (CVE-2022-22965). The rule specifically looks for payloads manipulating 'class.module.classLoader' or 'class.classLoader.resources.dirContext' to achieve Remote Code Execution (RCE) on vulnerable Spring Framework applications.
Detects HTTP traffic patterns characteristic of Emotet malware command and control (C2) beaconing, specifically looking for POST requests with random alphanumeric URIs (4-16 characters) and a specific Accept-Encoding header (gzip, deflate).
Detects HTTP requests containing directory traversal patterns (e.g., ../, %2e%2e/) combined with attempts to access sensitive system files like /etc/passwd, shadow files, or Windows system configuration files (boot.ini, win.ini).
Detects network traffic consistent with the default configuration of a Cobalt Strike Malleable C2 Beacon. The rule identifies HTTP GET requests to a '/updates' URI path, accompanied by the specific default User-Agent string 'Mozilla/4.0 (compatible; MSIE 6.0)', which is commonly observed in uncustomized Cobalt Strike deployments.
This rule monitors for HTTP POST requests containing 'class.module.classLoader', which is a characteristic payload component used to exploit the Spring4Shell vulnerability (CVE-2022-22965) in Spring Framework applications. This vulnerability allows for remote code execution (RCE) by manipulating class loader properties.
Detects incoming HTTP requests to Microsoft Exchange servers containing malicious X-AnonResource-Backend or X-BEResource headers, which are indicative of an attempt to exploit the ProxyLogon SSRF vulnerability (CVE-2021-26855).
Detects HTTP traffic initiating a WebSocket protocol upgrade with a specific 'binary' subprotocol header, characteristic of the Brickstorm backdoor used by the UNC5221 threat actor for command and control (C2) communication.
Detects network traffic associated with the Turla group's STOCKSTAY malware, specifically identifying outbound WebSocket upgrade requests directed to the known command-and-control domain weatherdataai.theworkpc.com.
Detects HTTP response bodies containing common PE/Shellcode magic headers (MZ, PE, or NOP sleds) which are associated with the delivery of payloads designed to exploit or utilize the Windows KernelCallbackTable for process injection. The detection focuses on suspicious content delivered over HTTP connections.
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