Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects attempts to exploit the Log4Shell vulnerability (CVE-2021-44228) by monitoring HTTP headers (User-Agent, X-Forwarded-For, Referer) for JNDI lookup strings. The JNDI lookup mechanism in vulnerable Log4j libraries allows an attacker to execute arbitrary code by pointing the lookup to a malicious LDAP, RMI, or DNS server.
Detects anomalous process execution chains originating from Gitea or Gitea Act Runner processes. This rule is designed to catch post-exploitation behavior associated with CVE-2026-20896, where an improperly configured reverse proxy allows an attacker to impersonate an administrator. The detection identifies shells, scripting interpreters, and network utilities spawned by the Gitea service, which may indicate command injection, malicious git hook execution, or CI/CD job abuse following an unauthorized administrative access.
Detects HTTP requests to Gitea instances containing the X-WEBAUTH-USER header, which facilitates user impersonation when Gitea is misconfigured with 'REVERSE_PROXY_TRUSTED_PROXIES = *' in a Docker environment. This vulnerability (CVE-2026-20896) allows an unauthenticated attacker to impersonate any user, including administrators.
Detects attempts to exploit the Log4Shell vulnerability (CVE-2021-44228) by monitoring HTTP headers for JNDI lookup strings. The rule inspects traffic for malicious patterns like '${jndi:ldap://', '${jndi:rmi://', or '${jndi:dns://', which are used to trigger remote code execution in vulnerable Java applications.
Detects unauthenticated POST requests directed at the '/accessv2' endpoint of an Azure Application Gateway originating from non-internal IP addresses. This behavior is associated with the exploitation of vulnerabilities like CVE-2026-8037.
Detects the presence of known exploit harness files or the execution of Python scripts and binaries associated with libssh2 publickey subsystem heap overflow and arbitrary free exploits (including proof-of-concept code and reproduction harnesses).
This rule detects post-exploitation activity related to the exploitation of PHP StreamBucket SOAP deserialization vulnerabilities. It monitors for child process execution from PHP web server processes (e.g., php-fpm, php.exe), the creation of specific proof-of-concept (PoC) marker files, and the presence of identified exploit script filenames on disk.
Detects exploitation of CVE-2026-48558 in SimpleHelp RMM software. This vulnerability allows an attacker to bypass OIDC identity token signature verification, leading to unauthorized creation of a privileged Technician account and MFA bypass, as observed in the Sua Sponte / SHADOW#REACTOR campaigns.
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 potential Server-Side Template Injection (SSTI) attacks targeting the Flocci API Gateway using Velocity Template Language (VTL). The rule monitors for malicious VTL patterns in network traffic, subsequent OS command execution, anomalous file creation indicating RCE, and IAM scope bypass patterns in cloud environment logs.
Detects post-exploitation activity related to CVE-2026-55200 (libssh2 heap OOB write), specifically identifying when curl, git, or php processes spawn interactive shells or attempt to access sensitive processes like lsass.exe, indicating a successful exploit chain.
This rule detects attempts to exploit the Log4Shell vulnerability (CVE-2021-44228) by monitoring HTTP headers for malicious JNDI lookup strings. Attackers use this injection to trigger the JNDI mechanism to connect to a remote server (LDAP, RMI, DNS) and download malicious Java classes, leading to remote code execution.
Detects incoming HTTP traffic targeting Apache Struts servers, attempting to exploit CVE-2017-5638 by injecting malicious OGNL (Object-Graph Navigation Language) expressions within the 'Content-Type' header.
Detects the execution of scripting interpreters and remote management tools originating from the SimpleHelp RMM process tree. This activity is indicative of post-exploitation abuse where an attacker, having hijacked a technician session (e.g., via CVE-2026-48558 OIDC bypass), uses the RMM console to execute commands on remote endpoints.
Detects inbound HTTP requests containing the JNDI lookup string characteristic of attempts to exploit the Log4Shell vulnerability (CVE-2021-44228) in Java-based applications.
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 anomalous application crashes of network-oriented utilities (curl, git, sftp, etc.) that leverage libssh2. This pattern is indicative of a heap over-read vulnerability, such as CVE-2025-15661, triggered by a malicious SFTP server response during an outbound session.
Detects network activity and successful administrative logins to Cisco SD-WAN vManage devices originating from IPs associated with threat actor UAT-8616. The rule also flags any successful vmanage-admin logins originating from outside known trusted management network ranges, which may indicate exploitation of CVE-2026-20127 or CVE-2026-20182.
Detects successful SSH authentication to administrative accounts ('vmanage-admin' or 'admin') on Cisco Catalyst SD-WAN Manager (vManage) devices originating from IP addresses associated with the threat actor UAT-8616. This activity relates to exploits targeting CVE-2026-20127 and CVE-2026-20182 for unauthorized access via authentication bypass or certificate abuse.
Detects the unauthorized addition or peering of rogue devices within a Cisco SD-WAN fabric. This rule monitors vManage and vBond logs for successful peering or registration events that correlate with known rogue indicators, such as certificate validation failures, mismatching system information, or untrusted peer identities. This activity is often indicative of attackers attempting to gain persistent control over the SD-WAN infrastructure, potentially using authentication bypass vulnerabilities or stolen credentials.
Detects inbound HTTP POST requests directed at the /SDK/webLanguage path, which is known to be vulnerable to command injection via CVE-2021-36260 in Hikvision IP cameras.
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