Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects attempts to exploit CVE-2026-83549 in SonicWall SMA1000 appliances, where an attacker sends a malicious HTTP request to the 'workplace' URI containing shell metacharacters such as ';', '|', '`', or '$(' to execute arbitrary OS commands.
This rule detects a potential heap overflow exploitation attempt against F5 BIG-IP Access Policy Manager (APM) by inspecting HTTP POST requests to the /oauth/token endpoint with an unusually large 'grant_type' field (exceeding 4096 bytes). This behavior is characteristic of an attempt to trigger the heap overflow vulnerability identified as CVE-2026-94127.
Detects an exploitation attempt against PoeLLM or LiteLLM MCP test/connection endpoint using a python3 stdio payload that fetches data from port 81.
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 outbound TCP traffic on port 443 destined for a hardcoded IP address associated with ValleyRAT C2 activity. The rule specifically monitors for established connections with a small payload size (5 bytes) that lack standard TLS handshake characteristics (no SNI), and applies a threshold to mitigate noise. This behavior is indicative of C2 heartbeats from malicious implants using DLL side-loading techniques.
This rule detects outbound TLS traffic to the domain 'trace-flow.ru', which is associated with Max Messenger covert telemetry beaconing behavior. The rule inspects the Server Name Indication (SNI) field in the TLS handshake for the specific domain string.
Detects HTTP GET requests for files with a .hta extension, utilizing a legacy Internet Explorer User-Agent string. This pattern is commonly associated with SideCopy threat group activities where mshta.exe is used to proxy the execution of remotely hosted malicious HTA files, often as part of an initial infection chain.
This rule detects potential exploitation attempts targeting the Splunk REST API (CVE-2026-20253) by monitoring for unauthenticated inbound requests to the /services/ path. It specifically looks for requests that lack the required Authorization or Cookie headers.
Detects network traffic matching the default HTTP check-in pattern of Mythic C2 agents. This rule monitors for POST requests using a specific hardcoded User-Agent string and Content-Type header commonly used in default Mythic agent configurations, indicating a potential active command-and-control session.
Detects specific markers in UDP traffic on ports 3478, 5349, and 443 that are associated with the DragonForce malware's TRN1 C2 beaconing protocol. The rules identify session initiation, task polling, task acknowledgment, and result uploading behaviors.
This rule detects HTTP POST requests targeting Adobe Commerce or Magento checkout, customer, or admin endpoints that contain suspicious syntax patterns indicative of Server-Side Template Injection (SSTI). These patterns ({{...}}, {%...%}, ${...}) are common in various template engines and, when injected into application inputs, can lead to Remote Code Execution (RCE) via CVE-2026-75650.
This rule monitors network appliance logs (Fortinet, Cisco, Meraki, WatchGuard, Sophos) for patterns associated with known vulnerabilities, including authentication bypass (CVE-2022-40684), SQL injection, path traversal, and command injection attempts within URL parameters. It also flags high-severity IPS/IDS alerts generated by these devices.
This rule monitors network appliance logs (Fortinet, Cisco, Meraki, WatchGuard, Sophos) for patterns associated with known vulnerabilities, including authentication bypass (CVE-2022-40684), SQL injection, path traversal, and command injection attempts within URL parameters. It also flags high-severity IPS/IDS alerts generated by these devices.
Detects TLS connections to a specific, potentially adversary-controlled ScreenConnect relay infrastructure endpoint. Adversaries frequently abuse legitimate remote access tools like ScreenConnect for command and control purposes.
Detects multiple attempts to connect to administrative shares (ADMIN$, C$, IPC$) from a single source within a 60-second window. This pattern is indicative of automated lateral movement or enumeration attempts using the SMB protocol.
Detects an exploitation attempt against PaperCut MF software leveraging SQL injection to deliver a Java bytecode loader (identified by the 'cafebabe' magic bytes) via a POST request.
This rule detects established TLS connections to external domains that exhibit characteristics often associated with phishing campaigns. Specifically, it looks for domain names in the SNI field that contain common brand names (e.g., microsoft, google, paypal) combined with typical login-related keywords (e.g., login, verify, auth) on high-churn or suspicious Top-Level Domains (TLDs) such as .top, .xyz, or .icu.
This rule detects established TLS connections to external domains that exhibit characteristics often associated with phishing campaigns. Specifically, it looks for domain names in the SNI field that contain common brand names (e.g., microsoft, google, paypal) combined with typical login-related keywords (e.g., login, verify, auth) on high-churn or suspicious Top-Level Domains (TLDs) such as .top, .xyz, or .icu.
This rule detects established TLS connections to external domains that exhibit characteristics often associated with phishing campaigns. Specifically, it looks for domain names in the SNI field that contain common brand names (e.g., microsoft, google, paypal) combined with typical login-related keywords (e.g., login, verify, auth) on high-churn or suspicious Top-Level Domains (TLDs) such as .top, .xyz, or .icu.
Detects repeated attempts to perform IIS 8.3 tilde short-filename enumeration. This reconnaissance technique exploits the legacy DOS 8.3 file naming convention to identify the existence and naming of files or directories on a Microsoft IIS web server.
Detects outbound HTTP requests to 'letsdiskuss.com' with a URI pattern of '/user/', which is characteristic of the 'STAC4924' loader utilizing a dead-drop resolver for command-and-control communication.
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