Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This analytic detects multipart POST requests containing a PHPSESSID form field and an uploaded filename with a PHP opening tag.
When observed with "PHP_SESSION_UPLOAD_PROGRESS" behavior, this may indicate an attempt to place executable PHP content into session-related data as part of PHP2Shell exploitation.
When observed with "PHP_SESSION_UPLOAD_PROGRESS" behavior, this may indicate an attempt to place executable PHP content into session-related data as part of PHP2Shell exploitation.
This analytic detects HTTP POST requests with a body of at least one megabyte that receive an HTTP 500 response.
Large failed uploads can indicate attempts to trigger resource exhaustion or exploit vulnerable request handling, including behavior associated with PHP2Shell, but require investigation with related web and application logs.
Large failed uploads can indicate attempts to trigger resource exhaustion or exploit vulnerable request handling, including behavior associated with PHP2Shell, but require investigation with related web and application logs.
This analytic detects multipart POST requests containing the "PHP_SESSION_UPLOAD_PROGRESS" form field and a serialized PHP structure in an uploaded filename.
This combination may indicate an attempt to exploit PHP session upload-progress handling and can be associated with PHP2Shell activity.
This combination may indicate an attempt to exploit PHP session upload-progress handling and can be associated with PHP2Shell activity.
This correlation analytic identifies likely PHP2Shell exploitation attempts by correlating a PHP memory disclosure indicator
with either of two independent PHP web exploitation indicators from Cisco Secure Firewall Threat Defense Intrusion Events.
Seeing these behaviors from the same source against the same destination within a short period can indicate an attempt to
improve the reliability of subsequent exploitation. Investigate the complete network and web server activity.
with either of two independent PHP web exploitation indicators from Cisco Secure Firewall Threat Defense Intrusion Events.
Seeing these behaviors from the same source against the same destination within a short period can indicate an attempt to
improve the reliability of subsequent exploitation. Investigate the complete network and web server activity.
Detects a malformed PHPSESSID Set-Cookie header indicative of CVE-2026-109618, which may result in stale session ID memory disclosure in PHP applications.
Detects HTTP POST requests containing multipart/form-data with PHP_SESSION_UPLOAD_PROGRESS, which is associated with CVE-2026-109618 and CVE-2026-109619 exploitation attempts, tracked via a detection filter.
This analytic detects Suricata multipart POST events with an uploaded filename containing a PHP opening tag.
Suricata EVE HTTP events do not expose multipart form field names, so this variant cannot confirm the PHPSESSID or PHP_SESSION_UPLOAD_PROGRESS fields without additional request-body inspection. The filename pattern may indicate an attempt to place executable PHP content into session-related data as part of PHP2Shell exploitation.
Suricata EVE HTTP events do not expose multipart form field names, so this variant cannot confirm the PHPSESSID or PHP_SESSION_UPLOAD_PROGRESS fields without additional request-body inspection. The filename pattern may indicate an attempt to place executable PHP content into session-related data as part of PHP2Shell exploitation.
Detects HTTP POST requests with multipart form data containing PHP session identifiers and PHP session upload progress parameters, indicative of an exploit attempt against a PHP application vulnerability (CVE-2026-109619).
Detects web requests originating from the RedTail botnet user-agent 'libredtail-http' attempting to exploit two or more distinct vulnerability families (such as Apache path traversal, PHP-CGI argument injection, PHPUnit eval-stdin, and ThinkPHP pearcmd) from a single source IP.
Detects a high volume of authentication failures followed by a successful authentication from the same source IP address against edge devices like FortiGate or Palo Alto GlobalProtect within a specific time window.
This analytic detects suspicious PHP web application requests using Cisco Secure Firewall Threat Defense Intrusion Events.
The matching network signature identifies a serialized input pattern associated with attempts to exploit PHP request handling.
Investigate the source, targeted application, and related web server activity to determine whether the request was part of PHP2Shell exploitation.
The matching network signature identifies a serialized input pattern associated with attempts to exploit PHP request handling.
Investigate the source, targeted application, and related web server activity to determine whether the request was part of PHP2Shell exploitation.
This analytic detects suspicious PHP web application upload activity using Cisco Secure Firewall Threat Defense Intrusion Events.
The matching network signature identifies a request pattern associated with attempts to exhaust server resources through PHP session handling.
Investigate the source, targeted application, and related web server activity to determine whether the request was part of PHP2Shell exploitation.
The matching network signature identifies a request pattern associated with attempts to exhaust server resources through PHP session handling.
Investigate the source, targeted application, and related web server activity to determine whether the request was part of PHP2Shell exploitation.
This analytic detects multipart POST traffic with a serialized PHP structure in an uploaded filename, which may indicate an attempt to exploit PHP session upload-progress handling and can be associated with PHP2Shell activity.
Suricata EVE's standard HTTP events do not expose multipart form field names, so this Suricata variant cannot confirm the PHP_SESSION_UPLOAD_PROGRESS field without additional request-body inspection.
Suricata EVE's standard HTTP events do not expose multipart form field names, so this Suricata variant cannot confirm the PHP_SESSION_UPLOAD_PROGRESS field without additional request-body inspection.
This analytic detects HTTP POST requests with a declared body size of at least one megabyte that receive an HTTP 500 response or have no response status recorded.
Large failed or unanswered uploads can indicate attempts to trigger resource exhaustion or exploit vulnerable request handling, including behavior associated with PHP2Shell, but require investigation with related web and application logs.
Large failed or unanswered uploads can indicate attempts to trigger resource exhaustion or exploit vulnerable request handling, including behavior associated with PHP2Shell, but require investigation with related web and application logs.
Detects successful administrative login events originating from IP addresses outside of configured trusted management networks on Fortinet devices.
The following analytic detects HTTP POST requests containing heavily encoded data in the post body, specifically looking for sequences of hex-encoded bytes or base64-encoded strings.
It leverages Zeek HTTP logs to identify POST requests where the body contains eight or more consecutive hex escape sequences or sixteen or more consecutive base64 character groups.
This activity is significant as adversaries commonly use hex or base64 encoding to obfuscate C2 communication, exfiltrate data, or deliver encoded payloads.
It leverages Zeek HTTP logs to identify POST requests where the body contains eight or more consecutive hex escape sequences or sixteen or more consecutive base64 character groups.
This activity is significant as adversaries commonly use hex or base64 encoding to obfuscate C2 communication, exfiltrate data, or deliver encoded payloads.
Correlates a CVE-2026-76504 encoded /%6a_security_check login POST with a follow-on /dataservice/admin/user request from the same client to the same vManage within 10 minutes. Summarized and sorted by follow-on count.
Detects multiple distinct source IPs sending forged 'pitboss PPE' authentication failure messages to NetScaler authentication endpoints within a short timeframe, associated with a fetch-based FreeBSD payload download (kw2-freebsd-x64-s11).
Detects HTTP requests containing serialized PHP objects in the Cookie header matching patterns associated with Zend Framework or Laminas gadget chains, characteristic of PHP object deserialization exploitation (e.g., PHPGGC style).
Detects successful Palo Alto GlobalProtect VPN authentications where no Multi-Factor Authentication (MFA) challenge or related text is recorded in the firewall logs, and no corresponding successful MFA sign-in event is found in Entra ID (SigninLogs).
Detects potential vulnerability scanning, enumeration, or bulk data extraction against Request Tracker (RT) web paths by monitoring high request volumes, distinct URI counts, or large response byte sizes within CommonSecurityLog data.
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