Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
120 detections
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Detects "BugCheck" errors indicating the system rebooted due to a crash, capturing the bugcheck code, dump file path, and report ID. This event can be leveraged by adversaries to obtain crash dumps which may contain sensitive information, including credentials.
This analytic identifies a heap-based buffer overflow in sudoedit by detecting Linux logs containing both "sudoedit" and "segfault" terms. This detection leverages Splunk to monitor for more than five occurrences of these terms on a single host within a specified timeframe. This activity is significant because exploiting this vulnerability (CVE-2021-3156) can allow attackers to gain root privileges, leading to potential system compromise, unauthorized access, and data breaches. If confirmed malicious, this could result in elevated privileges and full control over the affected system, posing a severe security risk.
The analytic identifies high resource utilization anomalies in Kubernetes processes. It leverages process metrics from an OTEL collector and hostmetrics receiver, fetched via the Splunk Infrastructure Monitoring Add-on. The detection uses a lookup table with average and standard deviation values to spot anomalies. This activity is significant as high resource utilization can indicate security threats like cryptojacking, unauthorized data exfiltration, or compromised containers. If confirmed malicious, such anomalies can disrupt services, exhaust resources, increase costs, and allow attackers to evade detection or maintain access.
The following analytic detects suspicious use of the `modprobe` command to unload kernel modules, which may indicate an attempt to disable critical system components or evade detection. The `modprobe` utility manages kernel modules, and unauthorized unloading of modules can disrupt system security features, remove logging capabilities, or conceal malicious activities. By monitoring for unusual or unauthorized `modprobe` operations involving module unloading, this analytic helps identify potential tampering with kernel functionality, enabling security teams to investigate and address possible threats to system integrity.
The following analytic detects the execution of the SOAPHound binary (`soaphound.exe`) with specific command-line arguments. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names, command-line arguments, and other process-related metadata. This activity is significant because SOAPHound is a known tool used for credential dumping and other malicious activities. If confirmed malicious, this behavior could allow an attacker to extract sensitive information, escalate privileges, or persist within the environment, posing a severe threat to organizational security.
The following analytic identifies the execution of tools built by NirSoft by detecting specific command-line arguments such as "/stext" and "/scomma". It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names, parent processes, and command-line executions. This activity is significant because NirSoft tools, while legitimate, can be exploited by attackers for malicious purposes such as credential theft or system reconnaissance. If confirmed malicious, this activity could lead to unauthorized access, data exfiltration, or further compromise of the affected system.
Detects the use of the WMI command-line (WMIC) utility to identify and display various system information, including OS, CPU, GPU, and disk drive names; memory capacity; display resolution; and baseboard, BIOS, and GPU driver products/versions. Some of these commands were used by Aurora Stealer in late 2022/early 2023.
Detects scriptblock text keywords indicative of potential usage of the tool WinPwn. WinPwn is a tool for Windows and Active Directory reconnaissance and exploitation. The rule specifically looks for 'Offline_Winpwn', 'WinPwn ', 'WinPwn.exe', or 'WinPwn.ps1' within PowerShell script block logs.
Detects when Windows Defender Real-time Protection is disabled. This event may not contain detailed information about the initiator, requiring further investigation.
This rule detects events indicating issues with Windows Defender Real-Time Protection features. Specifically, it triggers when Real-Time Protection encounters an error and fails (EventID 3002) or when a Real-Time Protection feature restarts (EventID 3007). It filters out common false positives related to Network Inspection System errors due to missing updates or unknown antimalware security intelligence issues.
Detects scenarios where system auditing (i.e.: Windows event log auditing) is disabled. This may be used in a scenario where an entity would want to bypass local logging to evade detection when Windows event logging is enabled and reviewed. It is recommended to turn off "Local Group Policy Object Processing" via GPO to ensure Active Directory GPOs take precedence over local/edited computer policies.
Detects when an attacker attempts to disable or modify Sysmon's configuration to evade detection. This rule specifically looks for Sysmon's state changing to 'Stopped' or a 'Sysmon config state changed' event occurring when Sysmon was not already in a 'Started' state.
This rule detects when the Sysmon configuration is changed. This event (EventID 16) is generated by Sysmon itself when its configuration is updated, which could be a legitimate administrative action to reconfigure Sysmon or an attempt by an adversary to manipulate its monitoring capabilities to evade detection.
Detects blocked image load events with revoked certificates by code integrity.
Detects an installation of a device that is forbidden by the system policy
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