Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects network activity (DNS queries, TLS SNI, and HTTP Host headers) associated with known RedFlick command-and-control (C2) infrastructure domains: etia.ca, groy.cc, and secure-dns-hub.com.
Detects incoming HTTP requests to a FortiSandbox device that contain suspicious command injection patterns. The rule monitors both the URI and the request body for shell metacharacters such as ';', '|', '`', '$(', or '&&', followed by common binary execution commands (e.g., cat, wget, curl, bash, rm). This behavior is indicative of an exploit attempt targeting CVE-2026-39808.
Detects TLS traffic featuring certificates where both the subject and issuer common name (CN) are set to 'SLIVER', which is the default configuration for the Sliver C2 framework's self-signed certificates.
Detects HTTP GET requests to network appliance management interfaces containing query parameters commonly used to trigger remote command or shell execution (e.g., cmd, exec, shell, command), which is characteristic of web shell activity.
Detects HTTP GET requests to the URI '/dpixel', which is a known default beacon URI pattern associated with the Brute Ratel C4 command and control framework's 'Badger' implant.
Detects anomalous network traffic patterns characteristic of the PetitPotam exploit, specifically targeting the MS-EFSRPC interface on Windows SMB pipes. This behavior is used to force a remote system to initiate authentication to a specified target, facilitating NTLM relay attacks.
Detects NTLM authentication attempts targeting administrative network shares (ADMIN$ or C$) over the SMB protocol. This behavior is a common indicator of lateral movement techniques such as Pass-the-Hash, where an adversary uses captured NTLM hashes to authenticate to remote systems.
Detects the presence of self-signed TLS certificates with the common name 'JDYFJ' in the certificate subject or issuer fields. This pattern has been associated with the KV-Botnet, which has been utilized by the Volt Typhoon threat actor to obfuscate command and control traffic through compromised SOHO routers.
Detects an exploitation attempt targeting SharePoint through the EditingPageParser by injecting a Register directive. This attempt involves bypassing SafeControls through specifically crafted HTTP POST requests to ToolPane.aspx, utilizing the GetPartPreviewAndPropertiesFromMarkup function to execute malicious tag patterns.
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 HTTP responses containing a file named 'ClaudeDesktop.exe' served from paths containing '/artifacts/' on the 'claude.ai' host where the request referrer is not 'claude.ai' or 'anthropic.com', suggesting a malvertising or supply chain delivery attempt of a malicious installer.
Detects two-stage phishing activity involving an initial visit to a Vercel-hosted lure page followed by the exfiltration or relay of fingerprinting and sandbox-evasion results to api.telegram.org.
This rule detects a potential SYN flood denial-of-service attack, characterized by a high volume of TCP SYN packets directed at a target within a short timeframe. Such activity is indicative of attempts to exhaust server resources by leaving TCP handshakes incomplete.
Detects network activity associated with the AMOS (Atomic macOS Stealer) malware, specifically identifying outbound HTTP POST requests to the '/api/t' URI path occurring on non-standard ports. The detection utilizes a threshold-based trigger to identify potential C2 communication heartbeats.
This rule detects network traffic patterns indicative of the Lumma Stealer 'ClickFix' phishing campaign. It identifies outbound requests to suspicious domains ending in .cyou utilizing specific user agents (WinHttp or Microsoft BITS), which are characteristic of malicious PowerShell scripts attempting to retrieve secondary payloads.
This rule detects HTTP POST requests to .php files containing suspicious PHP execution functions in the request body, such as 'system', 'eval', or 'shell_exec'. These patterns are indicative of an attempt to execute commands via an in-memory or injected PHP web shell on an F5 BIG-IP APM device.
Detects post-exploitation activity against Citrix NetScaler appliances associated with CVE-2026-8452. The rule specifically monitors for HTTP GET requests targeting PHP files within the /var/vpn/theme/ directory, accompanied by efforts to execute shell commands (bin/sh) via the web server.
Detects high-frequency DNS NXDOMAIN responses for domains exhibiting patterns indicative of Domain Generation Algorithms (DGA), specifically fixed-length, high-entropy character strings. This behavior is commonly associated with botnets attempting to locate command and control infrastructure.
Detects HTTP POST requests directed at common Machine Learning inference endpoints (e.g., /predict, /classify, /infer) where the request body claims to be a multipart form-data image upload (Content-Type: image/jpeg) but the actual binary data does not contain the standard JPEG file signature (FF D8 FF). This pattern is indicative of adversarial attempts to bypass security controls or provide malformed payloads to ML models.
Detects unauthenticated GET requests to known AI and machine learning infrastructure management endpoints (e.g., DCGM, Ray, Kubeflow) that are commonly exposed without authentication. These interfaces provide operational metrics, cluster status, or job management details, which can be leveraged for reconnaissance.
Detects attempts to exploit CVE-2026-48710 in Starlette frameworks where an attacker attempts to smuggle path or authority information via the HTTP Host header using character encoding variations like slashes or URL-encoded sequences.
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