Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

4,916 detections

This rule detects the use of weak or commonly abused passwords directly within command-line interfaces. Threat actors often use this method to create new user accounts with easily guessable or known compromised passwords. The rule specifically looks for a predefined list of weak passwords appearing in the command line of a process creation event.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1021
This rule detects attempts to exploit CVE-2010-5278, a directory traversal vulnerability in MODx Revolution. Specifically, it looks for requests to `/manager/controllers/default/resource/tvs.php` with a `class_key` parameter containing a directory traversal sequence (`../../../../../../../../../../`) followed by `windows/win.ini%00`, indicating an attempt to read the `win.ini` file on a Windows server.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects exploitation attempts targeting CVE-2020-0688, a remote code execution vulnerability in Microsoft Exchange Server. The rule specifically looks for requests to '/ecp/default.aspx' containing '__VIEWSTATEGENERATOR=' and '__VIEWSTATE=' in the query string, which are indicators of the exploit.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
This rule detects exploitation attempts using the Pulse Connect Secure (PCS) vulnerability CVE-2021-22893. The detection logic looks for specific URI query patterns commonly associated with this exploit.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1020
Detects suspicious access to specific URLs associated with the exploitation of the ADSelfService Plus vulnerability CVE-2021-40539. Attackers have been observed targeting these URLs to exploit the vulnerability.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects exploitation attempts of Sitecore Experience Platform Pre-Auth RCE CVE-2021-42237. This vulnerability allows for remote code execution without authentication. The rule specifically looks for POST requests to the '/sitecore/shell/ClientBin/Reporting/Report.ashx' endpoint that result in a 200 HTTP status code, indicating a successful interaction with the vulnerable component.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects URL patterns indicative of ProxyShell exploitation attempts against Microsoft Exchange servers. The rule looks for specific URI query strings and HTTP status codes (401) that are characteristic of both failed and successful exploitation attempts.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects URL patterns and status codes that indicate a successful ProxyShell exploitation attack against Microsoft Exchange servers. The rule looks for requests to '/autodiscover.json' combined with specific URI paths like '/powershell', '/mapi/nspi', or '/EWS', and successful HTTP status codes (200 or 301).
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects attempts to exploit the VMware Workspace ONE Access Authentication Bypass vulnerability (CVE-2022-31656). This vulnerability allows a malicious actor with network access to the UI to obtain administrative access without authentication by sending a specially crafted URI query.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects attempts to exploit an Apache Spark server via CVE-2022-33891, which is a shell command injection vulnerability, by looking for specific patterns in web server query strings.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
This rule detects common SQL exception types in Python applications as defined by PEP 249. These exceptions (DataError, IntegrityError, ProgrammingError, OperationalError) indicate issues during database operations, which could range from malformed queries to database connectivity problems or constraint violations. While often benign, repeated or unusual occurrences of these errors could signal application vulnerabilities being exploited (e.g., SQL injection attempts leading to syntax errors) or other malicious database interactions.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
This rule detects anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser. This indicates a potential compromise of user credentials or an attempt to bypass authentication mechanisms.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects attempts to exploit Apache Spark shell command injection vulnerabilities, specifically CVE-2022-33891, by monitoring for suspicious command-line executions involving 'id -Gn' as a child process of a bash shell. This indicates an attacker successfully injecting commands into the Spark environment.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
This rule detects a specific threading-related error message in Apache HTTP Server error logs. The error message indicates an issue with priority changes for pthreads, specifically an assertion failure related to `__pthread_tpp_change_priority`. This could be indicative of an underlying problem with the Apache server's threading model, potentially caused by misconfigurations, incompatible modules, or resource exhaustion. While the rule itself doesn't directly detect an attack, such errors could be exploited or could be a symptom of a system under stress or compromise.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
This rule detects successful attempts to exploit the IIS shortname vulnerability, which allows enumeration of folders when IIS uses an old .Net Framework. The detection logic looks for HTTP GET or OPTIONS requests to URIs containing '~1' and ending with 'a.aspx', combined with successful HTTP status codes (200 or 301). This pattern is indicative of a successful fuzzing scan for the IIS shortname vulnerability.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects the creation of files with '.one' or '.onepkg' extensions in suspicious or uncommon locations, which could indicate the abuse of OneNote attachments for malware delivery. The rule specifically excludes files created by the legitimate OneNote application running from its standard installation path.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects suspicious execution of Microsoft HTML Help (hh.exe) when it is launched from unusual or temporary directories, or with command-line arguments indicating potential malicious activity. Adversaries often abuse hh.exe to execute malicious code embedded within Compiled HTML (CHM) files, leveraging it as a living-off-the-land binary to bypass defenses and execute payloads. The rule specifically looks for hh.exe being executed from common temporary or user download paths, which are frequently used for initial access or staging.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1020
Detects suspicious child processes spawned by the SQL Server process (sqlservr.exe). This activity is highly indicative of successful exploitation, such as Remote Code Execution (RCE) or SQL Injection, where an attacker leverages the SQL Server to execute arbitrary commands on the underlying operating system. The rule specifically looks for common system utilities and scripting interpreters that are often used by attackers for reconnaissance, persistence, or further compromise.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0020
Detects the exploitation of the Microsoft Exchange vulnerability CVE-2020-0688, which is a remote code execution vulnerability. The rule specifically looks for an 'Error' level EventID 4 from the 'MSExchange Control Panel' provider, combined with the presence of '__VIEWSTATE=' in the event data, indicating an attempt to exploit the vulnerability via the Eventlog.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Detects exploitation attempts targeting the TerraMaster TOS vulnerability CVE-2020-28188. This rule specifically looks for GET requests to '/include/makecvs.php' with a '?Event=' parameter, combined with common command injection payloads such as 'curl', 'wget', '.py', '.sh', 'chmod', or '_GET' in the URI query.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Detects the exploitation of the Microsoft Exchange ProxyToken vulnerability (CVE-2021-33766), which is an authentication bypass. The rule looks for specific URI query patterns and HTTP POST methods combined with a 500 HTTP status code, indicating a potential exploitation attempt against the Exchange Control Panel (ECP) or related services.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1019
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