Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects shell or downloader child processes (such as sh, bash, cmd.exe, powershell.exe, curl, or wget) spawned by common server application processes (such as Java, Ruby, Perl, or Exiftool), which may indicate Remote Code Execution (RCE) exploitation such as CVE-2021-26084, CVE-2023-22518, or CVE-2021-22205.
Detects shell or downloader child processes (such as sh, bash, cmd.exe, powershell.exe, curl, or wget) spawned by common server application processes (such as Java, Ruby, Perl, or Exiftool), which may indicate Remote Code Execution (RCE) exploitation such as CVE-2021-26084, CVE-2023-22518, or CVE-2021-22205.
Detects potential exploitation of CVE-2021-26084, a Confluence RCE using OGNL injection. The rule looks for specific POST requests to Confluence endpoints, either '/pages/createpage-entervariables.action' with a 'SpaceKey=x' parameter or '/doenterpagevariables.action' with a 'u0027' string in the POST body's 'queryString' parameter. It specifically targets requests from 'anonymous' users that result in a 200 HTTP status code.
Detects attempts to exploit Java-based web applications by identifying common payload strings often used in vulnerabilities like those affecting Confluence (CVE-2022-26134, CVE-2021-26084) and other Java deserialization or expression language injection flaws. The rule looks for specific patterns in web access logs that indicate the presence of Java code execution attempts, such as references to Java classes, runtime execution commands, and encoded characters often used in exploit payloads.
Detects the spawning of suspicious child processes by the Atlassian Confluence server, which may indicate successful exploitation of CVE-2021-26084. The rule specifically looks for the Confluence Java process spawning common command-line utilities and scripting interpreters often used in post-exploitation activities.
Java Payload Strings
Sigma
Detects possible Java payloads in web access logs