Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects a 'Segmentation Fault' error message in Apache error logs, indicating a crashing Apache worker process. This type of event can be caused by software vulnerabilities, misconfigurations, or malicious activity aiming to disrupt service availability.
This rule detects the execution of the PowerShell cmdlet 'Remove-ADGroupMember' with parameters '-Identity' and '-Members'. This cmdlet is used to remove one or more members from an Active Directory group. In the context of this rule, it specifically targets the removal of an account from the 'Domain Admins' group, which could be an adversary's attempt to inhibit access to critical accounts or to clean up their tracks after gaining access.
This rule detects the execution of the 'shutdown.exe' command-line utility with parameters '/r' (reboot) or '/s' (shutdown). This activity can be indicative of an adversary attempting to impact system availability by shutting down or rebooting a Windows system.
Detects when an AWS EFS (Elastic File System) mount target is deleted. This action can disrupt applications or instances relying on the mounted file system, potentially leading to a denial of service or data unavailability.
This rule identifies when an Azure Virtual Network or Virtual Network Gateway is modified or deleted. This activity is captured through Azure Activity Logs, specifically looking for 'MICROSOFT.NETWORK/VIRTUALNETWORKGATEWAYS/' or 'MICROSOFT.NETWORK/VIRTUALNETWORKS/' operations that end with '/WRITE' or '/DELETE'. Such actions can indicate unauthorized changes to network infrastructure, potentially leading to denial of service, network segmentation bypass, or other security incidents.
This rule detects the execution of commands or processes that contain specific command-line arguments or strings commonly associated with cryptocurrency mining activities. It looks for parameters such as CPU priority settings, donation levels (often set to zero by malicious miners), pool server addresses (e.g., 'pool.', 'stratum+tcp://', 'stratum+udp://'), and specific mining algorithms like 'rx/0'. The rule also includes base64 encoded versions of some of these strings to evade simple detection. It filters out common false positives like 'pool.c', 'pool.o', and 'gcc -' which might appear in legitimate compilation processes.
Detects any child process spawning from "Diskshadow.exe". This could be due to executing Diskshadow in interpreter mode or script mode and using the "exec" flag to launch other applications. Adversaries may use Diskshadow.exe to proxy execution of other commands or to inhibit system recovery by deleting shadow copies.
This rule identifies when a virtual network device in Azure, such as a network interface, network virtual appliance, virtual hub, or virtual router, is either modified or deleted. Monitoring these operations can help detect unauthorized changes or disruptions to network infrastructure.
Identifies when a service account is modified, created, updated, enabled, or undeleted in Google Cloud. This rule specifically looks for API calls related to service account management, which could indicate an attacker establishing persistence, escalating privileges, or otherwise manipulating cloud resources.
This rule detects outbound network connections from a Linux system to known Monero crypto mining pools. The detection is based on a predefined list of destination hostnames associated with various Monero mining operations. This activity is indicative of resource hijacking, where a system's computational resources are illicitly used for cryptocurrency mining.
Detects the usage of utilities such as 'systemctl', 'service', and 'chkconfig' to stop or disable services on a Linux system. This activity can be indicative of an adversary attempting to impair defenses or disrupt system operations.
This rule detects when an application has been uninstalled from a Windows system. It specifically looks for MsiInstaller events with EventIDs 1034 (Windows Installer removed the product) or 11724 (Product Removal Successful). This can be an indicator of an adversary attempting to remove security software or other critical applications to hinder detection or response efforts, or simply to clean up their tracks.
This rule detects the termination of important Windows services, such as antivirus, firewall, Microsoft Defender components, BitLocker, and Encrypting File System (EFS). It specifically looks for Event ID 7023 from the 'Service Control Manager' provider, indicating a service termination with an error. The rule identifies critical services by their display names (which can be language-specific) or by their wide hex-encoded service names in the 'Binary' field of the event.
Detects the execution of Sysinternals Sdelete when its executable file has been renamed from its original name (sdelete.exe or sdelete64.exe). This behavior is often indicative of an attempt to evade detection or obscure the use of a legitimate tool for malicious purposes, such as data destruction.
Detects LockerGoga ransomware activity by identifying a specific command-line argument pattern used by the malware. The rule looks for the string '-i SM-tgytutrc -s' within process command lines, which is a known indicator of LockerGoga execution.
Detects specific process characteristics associated with Maze ransomware droppers. This includes a temporary file being executed as a child process of WINWORD.exe, and the execution of wmic.exe to delete shadow copies, which is a common tactic for ransomware to inhibit system recovery.
Detects the deletion of Windows Volume Shadow Copies using PowerShell with WMI (Get-WmiObject/Get-CimInstance) or CIM (Remove-WmiObject/Remove-CimInstance) commands. This technique is commonly employed by ransomware families like Sodinokibi/REvil to prevent system recovery.
Detects the stopping of a Windows service using the built-in 'sc.exe' utility. This rule specifically looks for process creation events where 'sc.exe' is executed with the 'stop' command-line argument. While 'sc.exe' is a legitimate system tool, its use to stop services can be indicative of malicious activity, especially when combined with other suspicious behaviors, as adversaries may stop services to disrupt operations, evade defenses, or facilitate data destruction/encryption.
Identifies when a Point-to-site VPN is Modified or Deleted in Azure. This could indicate an attacker attempting to disrupt network access or cover their tracks by removing or altering VPN configurations.
This rule identifies when a suppression rule is created in Azure. Adversaries might create suppression rules to evade detection by preventing security alerts from being generated or displayed for their malicious activities.
Detects suspicious manipulations of default accounts such as 'administrator' and 'guest' using `net.exe` or `net1.exe`. This includes actions like enabling/disabling accounts or changing passwords, which are often performed by adversaries for persistence or impact.
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