Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
576 detections
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Detects the PoisonedRefresh implant's UNIX domain socket backdoor by (1) file activity on the uniquely-named /run/bigtlog.pipe socket initiated by an Apache/httpd process, and (2) process command lines containing the implant's hardcoded authentication token. Removed the earlier generic 'bash spawned by httpd' heuristic, which fired on legitimate CGI/mod_php/admin automation that shells out from the web server and was the dominant false-positive source.
Detects unexpected child process execution (php, bash, sh) by web server processes (php-fpm, apache, nginx) while accessing specific Magento application directories (var/report, var/log/system.log) or parameters often associated with the StyleSmuggler exploitation technique, indicating potential Remote Code Execution.
Detects web server processes (e.g., w3wp.exe, nginx.exe, tomcat.exe) spawning command-line interpreters or utilities that could indicate remote code execution, web shell activity, or post-exploitation discovery/download attempts.
Detects web server processes (e.g., w3wp.exe, nginx.exe, tomcat.exe) spawning command-line interpreters or utilities that could indicate remote code execution, web shell activity, or post-exploitation discovery/download attempts.
The following analytic identifies potential exploitation attempts against Citrix ADC related to CVE-2023-3519. It detects POST requests to specific web endpoints associated with this vulnerability by leveraging the Web datamodel.
This activity is significant as CVE-2023-3519 involves a SAML processing overflow issue that can lead to memory corruption, posing a high risk.
If confirmed malicious, attackers could exploit this to execute arbitrary code, escalate privileges, or disrupt services, making it crucial for SOC analysts to monitor and investigate these alerts promptly.
This activity is significant as CVE-2023-3519 involves a SAML processing overflow issue that can lead to memory corruption, posing a high risk.
If confirmed malicious, attackers could exploit this to execute arbitrary code, escalate privileges, or disrupt services, making it crucial for SOC analysts to monitor and investigate these alerts promptly.
Detects instances where base64-encoded PHP code, obfuscated behind a 'data:image/gif;base64' MIME type prefix, is written to the disk as a .php file or initiated by web server processes. This pattern is commonly used in file upload bypass attacks to execute arbitrary code.
Detects unauthenticated requests to the WordPress admin-ajax.php endpoint utilizing the 'super_create_nonce' action. This action allows an unauthenticated user to generate a valid session nonce, which is a critical bypass mechanism often required for the exploitation of vulnerabilities within the Super Forms plugin, such as CVE-2026-14894.
Detects anomalous, high-volume unauthenticated POST requests to the Elementor Pro 'admin-ajax.php' endpoint with the 'elementor_pro_forms_send_form' action. This behavior is indicative of potential exploitation attempts or reconnaissance associated with the Elementor Pro file upload vulnerability (CVE-2026-32475).
Detects suspicious GET requests to the Magento '/customer/section/load/' endpoint with specific parameters ('sections=customer' and 'force_new_section_timestamp=true'). These requests are indicative of reconnaissance activity related to the StyleSmuggler campaign, potentially associated with exploitation of Magento vulnerabilities such as CVE-2025-54236.
Detects the PoisonedRefresh implant's UNIX domain socket backdoor by (1) file activity on the uniquely-named /run/bigtlog.pipe socket initiated by an Apache/httpd process, and (2) process command lines containing the implant's hardcoded authentication token. Removed the earlier generic 'bash spawned by httpd' heuristic, which fired on legitimate CGI/mod_php/admin automation that shells out from the web server and was the dominant false-positive source.
Detects the PoisonedRefresh implant's UNIX domain socket backdoor by (1) file activity on the uniquely-named /run/bigtlog.pipe socket initiated by an Apache/httpd process, and (2) process command lines containing the implant's hardcoded authentication token. Removed the earlier generic 'bash spawned by httpd' heuristic, which fired on legitimate CGI/mod_php/admin automation that shells out from the web server and was the dominant false-positive source.
Detects the PoisonedRefresh implant's UNIX domain socket backdoor by (1) file activity on the uniquely-named /run/bigtlog.pipe socket initiated by an Apache/httpd process, and (2) process command lines containing the implant's hardcoded authentication token. Removed the earlier generic 'bash spawned by httpd' heuristic, which fired on legitimate CGI/mod_php/admin automation that shells out from the web server and was the dominant false-positive source.
Detects anomalous, high-volume unauthenticated POST requests to the Elementor Pro 'admin-ajax.php' endpoint with the 'elementor_pro_forms_send_form' action. This behavior is indicative of potential exploitation attempts or reconnaissance associated with the Elementor Pro file upload vulnerability (CVE-2026-32475).
Detects the presence of the 'Mushr00w' PHP web shell, typically associated with exploitation of vulnerabilities in WordPress plugins such as Super Forms or Elementor Pro. The rule looks for identifying strings within the file, including specific filenames, HTML title tags, and common PHP file upload function signatures used by this shell.
Detects PHP scripts that masquerade as WordPress cache classes but contain functionality for decrypting commands using AES-256-CBC and executing them via shell_exec. The detection identifies the presence of hardcoded encryption keys, use of php://input, and common PHP obfuscation/encryption methods alongside shell execution functions.
Detects instances where common web server applications (e.g., Apache, Tomcat, IIS, Nginx) or Java runtime environments spawn suspicious child processes like command shells (cmd.exe, powershell.exe, sh, bash) or network utilities (wget, curl). This behavior often indicates exploitation of a web vulnerability, such as Remote Code Execution (RCE), allowing an adversary to execute commands or download further malicious payloads.
Detects unexpected child process execution (php, bash, sh) by web server processes (php-fpm, apache, nginx) while accessing specific Magento application directories (var/report, var/log/system.log) or parameters often associated with the StyleSmuggler exploitation technique, indicating potential Remote Code Execution.
Detects instances where common web server processes (e.g., PHP, Apache, Nginx) spawn child processes associated with command-line utilities (e.g., curl, bash, python). The rule specifically monitors for command-line arguments referencing log files or traces, which is indicative of potential exploitation attempts or post-exploitation activities such as log poisoning or remote code execution.
Detects HTML content that mimics Cloudflare CAPTCHA challenges to perform social engineering (ClickFix). The rule specifically identifies the combination of fake CAPTCHA UI text, connection to suspicious domains (DDR patterns), and JavaScript snippets used to fetch and execute secondary payloads or redirects.
Detects anomalous, high-volume unauthenticated POST requests to the Elementor Pro 'admin-ajax.php' endpoint with the 'elementor_pro_forms_send_form' action. This behavior is indicative of potential exploitation attempts or reconnaissance associated with the Elementor Pro file upload vulnerability (CVE-2026-32475).
Detects instances where base64-encoded PHP code, obfuscated behind a 'data:image/gif;base64' MIME type prefix, is written to the disk as a .php file or initiated by web server processes. This pattern is commonly used in file upload bypass attacks to execute arbitrary code.
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