Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects attempts to access a webshell that has been dropped into a keystore folder on an Oracle WebLogic server. The detection is based on the URI query containing '*/config/keystore/*.js*', which is indicative of an attacker trying to interact with a webshell placed in a specific directory often associated with the CVE-2018-2894 vulnerability.
Detects exploitation attempts of the OWASSRF vulnerability targeting Microsoft Exchange servers using publicly available Proof-of-Concept (POC) code. This rule specifically looks for requests to the OWA endpoint attempting to access the PowerShell backend endpoint, characterized by a specific user agent, POST method, successful status code (200), and URI query containing both '/owa/mastermailbox' and '/powershell'. This indicates an attempt to leverage the vulnerability for remote code execution.
Detects exploitation attempts of the OWASSRF variant targeting Exchange servers. This exploit leverages the OWA endpoint to access the PowerShell backend endpoint, often associated with CVE-2022-41080 and CVE-2022-41082.
This rule detects when an Nginx worker process crashes and generates a core dump, indicated by the log message 'exited on signal 6 (core dumped)'. This event can signify a serious underlying problem with the Nginx configuration, a plugin, or potentially an exploitation attempt targeting the Nginx server. Core dumps contain the memory state of the process at the time of the crash, which can be valuable for debugging but also sensitive if exposed.
Detects exploitation attempts against Citrix Netscaler, Application Delivery Controller, and Citrix Gateway devices targeting CVE-2019-19781. The rule looks for specific URI query patterns indicative of directory traversal or direct access to vulnerable scripts.
Detects Server-Side Template Injection (SSTI) attempts made via GET requests. The rule looks for common SSTI payload strings within the request, specifically excluding requests that result in a 404 Not Found status code to reduce false positives.
This rule detects attempts to inject Cross-Site Scripting (XSS) payloads via GET requests in web access logs. It specifically looks for common XSS strings and encoded variations within the request URL, such as '<script>', '<iframe>', '<svg>', 'document.cookie', 'document.domain', 'onerror=', 'onresize=', 'onload=', 'onmouseover=', '${alert', 'javascript:alert', and their URL-encoded forms. The rule filters out requests that result in a 404 HTTP status code to reduce false positives.
Detects an attempt to leverage the vulnerable servlet "mboximport" for an unauthenticated remote command injection in Zimbra Collaboration Suite Email Server, specifically targeting CVE-2022-27925. The rule looks for POST requests to the '/service/extension/backup/mboximport' endpoint with specific query parameters ('account-name', 'ow', 'no-switch', 'append') and then checks for subsequent requests to '/zimbraAdmin/*.jsp' with a 200 status code, indicating potential successful exploitation and web shell access.
Detects errors in NodeJS applications related to process execution, specifically looking for the keyword 'node:child_process'. These errors, especially if triggered by user input, may indicate an attempted Remote Code Execution (RCE) vulnerability exploitation.
Detects exploitation attempts targeting CVE-2018-15473 in OpenSSH, specifically looking for a characteristic error message generated during the pre-authentication phase when an attacker attempts to enumerate valid usernames.
Detects a process spawned by the terminal service server process (termsvcs), which could indicate an exploitation attempt of CVE-2019-0708, commonly known as BlueKeep. The rule specifically looks for processes where the parent command line contains both 'svchost.exe' and 'termsvcs', while filtering out legitimate processes like rdpclip.exe, csrss.exe, wininit.exe, and winlogon.exe.
Detects exploitation of the DNS RCE vulnerability (CVE-2020-1350) by monitoring for suspicious sub-processes spawned by the `dns.exe` service. This rule specifically looks for processes created by `dns.exe` that are not common or expected system processes, indicating potential post-exploitation activity after successful exploitation of the vulnerability.
Detects possible successful exploitation of CVE-2021-26858 (ProxyLogon) by monitoring for the creation of non-standard files by the Exchange Server's Unified Messaging service (UMWorkerProcess.exe). This activity could indicate the dropping of web shells or other malicious content post-exploitation.
Detects the spawning of suspicious child processes by an Atlassian Confluence server, specifically looking for shell interpreters (sh, bash, dash, ksh, zsh, csh, fish), curl, wget, or python being executed as child processes of the Confluence Java process. This behavior is indicative of successful exploitation of CVE-2022-26134, a critical remote code execution vulnerability in Atlassian Confluence. The rule focuses on the post-exploitation phase where an attacker would execute commands on the compromised server.
Detects events generated by user-mode applications when they call the CveEventWrite API, indicating that a known vulnerability is potentially being exploited. Microsoft started using this log in January 2020, notably with CVE-2020-0601 (a Windows CryptoAPI vulnerability). However, the rule's description notes that this log has historically seen limited use for reporting CVEs.
Detects the creation of a suspicious Alternate Data Stream (ADS) file, specifically a ':Zone.Identifier' stream, by processes other than common web browsers. The ':Zone.Identifier' ADS is used by Windows to mark files downloaded from the internet, indicating their origin and often triggering security warnings. This rule looks for the creation of this ADS with a 'ZoneId=3' (indicating an internet origin) on executable or document file types. By filtering out known browser processes, the rule aims to identify instances where other applications or scripts might be creating these ADS files, potentially as a defense evasion technique to bypass security warnings or to masquerade malicious files.
Detects exploitation attempts targeting Pulse Secure VPN appliances via CVE-2019-11510. Specifically, it looks for requests to a URI path containing '/dana/html5acc/guacamole/', which is indicative of an attacker attempting to access the Guacamole component of the Pulse Secure appliance.
Detects exploitation attempts targeting the F5 BIG-IP vulnerability CVE-2020-5902. The rule looks for specific URI query patterns indicative of directory traversal within the '/tmui/' or '/hsqldb' paths, which are known to be vulnerable.
Detects the exploitation of the VMware vSphere Remote Code Execution vulnerability (CVE-2021-21972) by identifying HTTP POST requests to the '/ui/vropspluginui/rest/services/uploadova' endpoint. This specific URI indicates an attempt to upload a malicious OVA file, which is the vector for the RCE.
This rule detects potential exploitation of CVE-2023-21554, dubbed 'QueueJumper'. The vulnerability allows for unauthorized remote code execution within the MSMQ service. The rule specifically looks for the 'mqsvc.exe' process (Microsoft Message Queuing service) spawning common Windows command-line interpreters or scripting engines, which would indicate an attempt to execute arbitrary code.
Detects attempts to exploit the Atlassian Bitbucket Command Injection vulnerability (CVE-2022-36804) via the archive API. The rule specifically looks for requests to the '/rest/api/latest/projects/' endpoint containing 'prefix=' and the command injection payload '%00--exec' in the URI query.
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