Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
18,132 detections
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Detects the execution of known Windows update-related binaries (UpdateAssistant.exe or AppUpdateHelper.exe) from non-standard, suspicious locations within AppData directories. This behavior is indicative of masquerading, where an adversary attempts to blend in by using a legitimate process name from an unexpected path.
Detects the creation of specific mutex objects ('AppUpdateHelper' or 'WinSvc') commonly associated with Hidden VNC (hVNC) backdoors. These mutexes are used by the malware to ensure only one instance is running on the host, and the regex pattern targets the specific naming convention (including a hex suffix) utilized by these threats.
Detects the creation of specific mutex objects ('AppUpdateHelper' or 'WinSvc') commonly associated with Hidden VNC (hVNC) backdoors. These mutexes are used by the malware to ensure only one instance is running on the host, and the regex pattern targets the specific naming convention (including a hex suffix) utilized by these threats.
Detects access to Firefox profile database files (cookies.sqlite, places.sqlite, permissions.sqlite) by suspicious processes that are masquerading as legitimate system maintenance or update utilities. This rule specifically targets known masquerading process names (UpdateAssistant.exe, AppUpdateHelper.exe, SysMaintenance.exe) while excluding the legitimate firefox.exe process and its installation directory.
Detects uncommon or suspicious child processes spawning from a WSL process. This could indicate an attempt to evade parent/child relationship detections or persistence attempts via cron using WSL.
Detects the RejectDirectSend bypass (null SMTP envelope sender + internal-domain spoof). Tightened to require Microsoft's composite auth verdict OR all of SPF/DKIM/DMARC failing (vs. any one), excludes known-approved Direct Send relay IPs, and excludes likely-legitimate bulk/newsletter traffic via BulkComplaintLevel.
Detects incoming emails where the SMTP envelope sender (MAIL FROM) is blank, but the visible 'From' header displays an internal/accepted domain. This technique is often used to bypass email authentication filters. The rule specifically alerts on cases where SPF, DKIM, or DMARC checks failed or returned 'none', yet the message was still delivered to an inbox or folder, suggesting a configuration gap or allow-list override.
Detects the execution of rundll32.exe with a command line pointing to a WebDAV share path (DavWWWRoot). This technique is commonly used to execute remote payloads by forcing the system to access a remote resource, often as part of a malicious DLL loading chain.
Detects sessions using shared Grafana service account tokens that perform both read-only and action-capable tool operations without confirmed prior authentication. This behavior is indicative of an unauthenticated or spoofed session leveraging a service account's excessive permissions, bypassing standard authentication flows.
Detects attempts by processes to query Windows Registry keys that store configuration data for virtualization software like VMware and Oracle VirtualBox. This behavior is commonly used by malware to detect if it is running within an analysis environment to evade detection.
Detects a process enabling multiple sensitive Windows privileges simultaneously via a single AdjustTokenPrivileges event (Event ID 4703). This behavior is characteristic of malicious tools, such as the XHOPELESS wiper, attempting to gain broad system control for activities like tampering with firmware, killing protected processes, loading malicious drivers, or modifying boot configurations.
Detects a privilege escalation technique where an attacker with application management permissions adds a credential to the 'Office 365 Exchange Online' service principal (SP). The attacker then leverages the SP's 'Domain.ReadWrite.All' permission to add or modify a federated domain, allowing them to forge tokens for any hybrid user.
This rule detects the execution of arbitrary commands via the Windows Subsystem for Linux (WSL) by monitoring process creation events where 'wsl.exe' is the executable. It specifically looks for command lines that include flags like '--exec' or '-e', or common shell commands and downloaders such as 'curl', 'wget', 'bash -c', 'sh -c', 'nc ', or 'ncat '. This activity can indicate an adversary leveraging WSL to execute malicious code or bypass security controls.
Detects periodic execution cycles of ERAAgent.exe that involve memory protection changes, characteristic of the SLEEPWALKER malware's XOR-decrypt-execute-reencrypt loop scheduled by a cron-like mechanism.
Detects instances where WerFault.exe or WerMgr.exe, running with SYSTEM privileges, loads a DLL file from the Windows\System32 directory that was created within 10 minutes of the image load event. This behavior is indicative of potential DLL side-loading or hijack techniques used to achieve privilege escalation.
Detects a specific evasion behavior associated with the NinjaMare malware, where a process idles for at least 7 minutes before moving its window to off-screen coordinates during automated mouse or keystroke input, followed by restoring the window to its original position.
Detects the modification or creation of the 'SealedConfig' value within the 'Software\synapse\Config' registry key, correlated with the deletion of a 'config.toml' file on the same device. This pattern may indicate an adversary tampering with Synapse software configuration or attempting to remove audit/configuration trails.
This rule detects potentially malicious modifications to PostgreSQL configuration files or the creation of new library files (.so or .dll) by the PostgreSQL service process. It also flags when the PostgreSQL service process is initiated with command-line arguments referencing 'shared_preload_libraries', which can be abused to load arbitrary code or malicious extensions into the database engine.
Detects when the PostgreSQL service process (postgres.exe/postgres/postmaster) loads a shared library (.dll or .so) from a non-standard, user-writable directory (e.g., Temp, AppData, /tmp). This behavior is indicative of potential exploitation of vulnerabilities like CVE-2026-6471, where attackers attempt to load malicious plugins via unvalidated logical decoding plugin paths.
This rule detects the use of 'mshta.exe' to execute a file from a remote location by inspecting the command line for 'http' protocols and a specific suspicious domain. Adversaries often abuse mshta.exe to proxy the execution of malicious HTML Application (HTA) files or scripts to bypass security controls.
Detects modifications or creation of InprocServer32 COM registry keys by suspicious processes like mshta.exe or powershell.exe, which is indicative of COM Hijacking for persistence or privilege escalation.
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