Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
18,132 detections
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Detects attempts to delete, truncate, or overwrite critical system logs and user command history files (such as /var/log/auth.log, syslog, or .bash_history) on Linux systems using common utilities like rm, shred, and truncate. The rule includes exclusions for legitimate system maintenance processes like logrotate and cron.
Detects attempts to delete, truncate, or overwrite critical system logs and user command history files (such as /var/log/auth.log, syslog, or .bash_history) on Linux systems using common utilities like rm, shred, and truncate. The rule includes exclusions for legitimate system maintenance processes like logrotate and cron.
This rule detects potentially unauthorized root account activity by monitoring for 'root' logon events and privileged process execution (such as 'su' or 'sudo'). It flags sessions or commands that occur outside of defined business hours, originate from unapproved IP addresses, use unapproved accounts, or are executed via suspicious parent processes, providing a high-confidence indicator of anomalous administrative behavior.
Detects anomalous certificate-based authentication attempts to Jasmine network services characterized by rapid, impossible-travel scenarios or geo-inconsistent session patterns. This behavior is indicative of a stolen certificate being reused from a different geographic location or network, bypassing standard authentication patterns.
Detects anomalous certificate-based authentication attempts to Jasmine network services characterized by rapid, impossible-travel scenarios or geo-inconsistent session patterns. This behavior is indicative of a stolen certificate being reused from a different geographic location or network, bypassing standard authentication patterns.
Detects a GitLab personal access token/response indicating Owner-level (access_level 50) group access combined with the broad 'api' scope on the sensitive gnutls/gnutls project -- the excessive standing-privilege pattern that turned one leaked token into a 55-project exposure.
Detects the gitlab-triage automation tool being invoked with a personal access token scoped to the broad 'api' permission rather than a narrower issue/MR-only scope, inflating the blast radius if the token leaks.
Detects execution of the JITTERLY Linux backdoor masquerading as 'configd' (with its -nodel fallback flag) and/or beaconing to its hardcoded C2 domain (s2.981666.xyz:8082), matching Red Heron's observed tradecraft.
Detects execution of the JITTERLY Linux backdoor masquerading as 'configd' (with its -nodel fallback flag) and/or beaconing to its hardcoded C2 domain (s2.981666.xyz:8082), matching Red Heron's observed tradecraft.
Detects successful authentication events using known default or low-privileged Cisco Firepower Management Center (FMC) service accounts, or IDS alerts (Snort SID 66883) associated with credential abuse activity potentially related to CVE-2026-20316.
Detects successful authentication events using known default or low-privileged Cisco Firepower Management Center (FMC) service accounts, or IDS alerts (Snort SID 66883) associated with credential abuse activity potentially related to CVE-2026-20316.
This rule detects potential attempts to tamper with or bypass Windows Defender by monitoring for files or processes named 'ShieldCrash' occurring in close temporal proximity to the creation or modification of files within Windows Defender's shadow or scan directories (BaseNamedObjects\Restricted\WD_SHADOW_ or WD_SCAN). This behavior is often associated with malware attempting to evade security detection.
Detects the creation of specific Object Manager namespace directories and objects used by the ShieldCrash proof-of-concept (CVE-2026-69414) to hijack the Microsoft Defender scan process.
Detects the creation of specific Object Manager namespace directories and objects used by the ShieldCrash proof-of-concept (CVE-2026-69414) to hijack the Microsoft Defender scan process.
Detects the creation of specific Object Manager namespace directories and objects used by the ShieldCrash proof-of-concept (CVE-2026-69414) to hijack the Microsoft Defender scan process.
Detects presence of multiple ShieldCrash CVE-2026-69414 PoC Visual Studio project/solution build artifacts indicating exploit tooling staging
This rule detects potential COM hijacking of the CLSID InprocServer32 registry keys or unauthorized loading/creation of the 'EhStoreShell.dll' file. These behaviors are common indicators of persistence mechanisms or DLL side-loading where attackers redirect legitimate system calls to malicious code.
The following analytic identifies processes running from file paths not typically associated with legitimate software. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on specific process paths within the Endpoint data model. This activity is significant because adversaries often use unconventional file paths to execute malicious code without requiring administrative privileges. If confirmed malicious, this behavior could indicate an attempt to bypass security controls, leading to unauthorized software execution, potential system compromise, and further malicious activities within the environment.
Detects successful authentication events to the Cisco Secure Firepower Management Center (FMC) web management interface involving low-privileged or read-only user accounts. This pattern is potentially associated with exploitation of vulnerabilities such as CVE-2026-20316, which may be leveraged for privilege escalation or unauthorized access.
Detects unauthorized attempts to disable or stop critical Windows Update services (wuauserv, UsoSvc, uhssvc, WaaSMedicSvc) via command line tools or service configuration changes. This behavior is indicative of defense evasion by malware such as Silver Fox/Gh0st RAT, aimed at preventing security updates or disabling security-related service monitoring.
This rule detects PowerShell processes spawned directly or indirectly by LNK files that include command-line arguments indicative of anti-analysis, anti-VM, or reconnaissance techniques. These include querying for specific WMI classes (e.g., Win32_Process, Win32_ComputerSystem), checking for virtualization artifacts (e.g., 'virtualbox', 'vmware', 'qemu', 'sandboxie'), or querying security and hardware information (e.g., 'antivirusproduct', 'securitycenter2', 'getmac').
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