SigmaHQ Detections
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6,797 detections
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This rule detects attempts to access the Local Security Authority Subsystem Service (LSASS) process memory with specific uncommon access flags (0x410 and 0x01410). These flags are often used by tools or techniques designed to dump credentials from LSASS, a common method for credential theft on Windows systems. The rule includes extensive filters to reduce false positives from legitimate software that might interact with LSASS.
Detects process execution related exceptions in JVM based applications, which can often indicate Remote Code Execution (RCE) attempts. The rule specifically looks for keywords like 'Cannot run program', 'java.lang.ProcessImpl', and 'java.lang.ProcessBuilder' in application error logs.
This rule identifies when an Amazon Elastic Kubernetes Service (EKS) cluster is either created or deleted. Monitoring these events can help detect unauthorized infrastructure changes, potential resource exhaustion, or malicious activity aimed at disrupting services or destroying data within a cloud environment.
This detection uses Azure Activity logs (Administrative category) to identify the deletion of an Azure AD Hybrid Health AD FS service instance in a tenant. A threat actor can create a new AD Health ADFS service and create a fake server to spoof AD FS signing logs. The health AD FS service can then be deleted after it is no longer needed via HTTP requests to Azure.
Identifies when an Azure Kubernetes Pod is deleted. This activity could indicate an attempt to disrupt services, evade detection, or remove evidence by an attacker. Monitoring these deletions is crucial for maintaining the integrity and availability of Kubernetes deployments.
This rule detects the execution of the 'unzip' command where the target file has a common image file extension ('.jpg' or '.png'). This behavior is indicative of an attempt to extract hidden information, specifically a zip archive, from an image file, a technique often used in steganography for defense evasion or data exfiltration.
Detects the execution of PHP CLI with the "-r" flag to run inline PHP code, specifically looking for calls to the "fsockopen" function. This combination is often used by attackers to create sockets for reverse shell connections, potentially in conjunction with functions like "exec" or "fopen". The rule also checks for common Unix shell names in the command line, indicating an attempt to spawn a shell.
Detects the creation or modification of scheduled cron jobs where the command line argument contains '/tmp/'. This behavior is often indicative of an adversary attempting to establish persistence or execute malicious code from a temporary directory using the cron utility.
Detects the execution of the 'curl' command on Linux systems when it includes options to set a custom user agent. This behavior can be indicative of command and control communication or data exfiltration attempts where an adversary tries to mimic legitimate web traffic or evade detection by changing the default user agent string.
Detects the execution of common Linux utilities used to discover system network connections and logged-in users. Specifically, it looks for 'who', 'w', 'last', 'lsof', and 'netstat' commands. It filters out legitimate calls from '/usr/bin/landscape-sysinfo' when 'who' is used.
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