Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects modification of autostart extensibility point (ASEP) in registry.
Detects modification of autostart extensibility point (ASEP) in registry.
Detects the occurrence of numerous space characters in RunMRU registry paths, which may indicate execution via phishing lures using clickfix techniques to hide malicious commands in the Windows Run dialog box from naked eyes.
Detects the occurrence of numerous space characters in TypedPaths registry paths, which may indicate execution via phishing lures using file-fix techniques to hide malicious commands. This technique is often used to bypass security controls that might inspect the command line for malicious strings.
This rule detects modifications to the HKEY_CURRENT_USER\SOFTWARE\Classes\CLSID\{CLSID}\InProcServer32 registry key where the RegistryValueData ends with ".dll" and does not point to common system directories (%systemroot%, C:\Program Files (x86)\, C:\Program Files\). This behavior is indicative of CLSID hijacking, a technique used by adversaries to achieve persistence or privilege escalation by redirecting legitimate COM object calls to a malicious DLL.
Detects potential COM object hijacking via modification of default system CLSID.
Detects the modification of the WDigest registry key to enable plaintext credential caching. This technique is used by threat actors like the Qilin ransomware group to harvest credentials from memory using tools like Mimikatz.
Detects the creation of a specific COM object registry key in the HKEY_CURRENT_USER hive to hijack the legitimate 'twinapi.dll' component. This persistence technique (T1546.015) was used by the ForumTroll APT group to load the LeetAgent and Dante spyware.
Monitor the creation of a new key under 'TaskCache' when a new scheduled task is registered by a process that is not svchost.exe, which is suspicious
Detects modification of autostart extensibility point (ASEP) in registry.
Detects registry modifications that add Windows Filtering Platform (WFP) filters, which may be used to block security tools and EDR agents from reporting events. This rule specifically looks for modifications to the 'Filter' subkey within the WFP policy parameters in the registry, while excluding modifications made by svchost.exe to reduce false positives.
This rule detects the creation of executable files (.exe, .dll, .pyd) within browser extension folders (Chrome, Edge, Firefox) followed by a related registry modification within a one-hour window. This behavior is indicative of malicious browser extension installation or modification, often used for persistence or data exfiltration.
This rule detects the modification of the Windows Registry to install or configure Chrome VPN extensions. Specifically, it looks for changes to the 'Software\Wow6432Node\Google\Chrome\Extensions' registry path where the 'update_url' value is set for a known list of VPN extension IDs. This method can be used by adversaries to establish persistence or gain initial access by forcing the installation of malicious or controlled VPN extensions.
Detects the modification of the Outlook setting "LoadMacroProviderOnBoot" to enable the automatic loading of any configured VBA project/module, which can be abused for persistence.
This rule detects persistence mechanisms used by the Kapeka backdoor. It specifically looks for the creation of a scheduled task named "Sens Api" (or "OneDrive" in some cases) via `schtasks.exe` set to run on system startup, or the addition of an autorun registry entry named "Sens Api" under `HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run` via `reg.exe`. Both persistence methods are identified by their command lines calling `rundll32` with a `.wll` file and the export ordinal `#1`.
Detects the creation or modification of registry values used by the HIDDENDRIVER rootkit to configure its hiding and protection capabilities. This rootkit, a modified version of the open-source "Hidden" project, uses these registry entries to define which files, processes, and registry keys to conceal. This activity is associated with the REF3927 threat actor and the TOLLBOOTH malware campaign.
This rule detects modifications to specific registry keys related to shell open commands for 'ms-settings' and 'exefile'. These modifications are commonly used for persistence and UAC bypass techniques, particularly those leveraging tools like UACMe and targeting executables such as fodhelper.exe, computerdefaults.exe, and slui.exe. The rule looks for changes to 'SymbolicLinkValue', 'DelegateExecute', and '(Default)' values within these registry paths, while filtering out empty default values.
This rule detects attempts to bypass User Account Control (UAC) by modifying the Windows Registry related to the 'mscfile' handler. Specifically, it looks for changes to the default command associated with '.msc' files, which can be abused by 'eventvwr.exe' to execute arbitrary code with elevated privileges without a UAC prompt. The filter excludes legitimate modifications where the 'Details' field starts with '%SystemRoot%\system32\mmc.exe "%1" %', aiming to reduce false positives from standard system operations.
Detects the setting of the "ImagePath" value of a service registry key to a path controlled by a non-administrator user such as "\AppData\" or "\ProgramData\". Attackers often use such directories for staging purposes. This rule might also trigger on badly written software, where if an attacker controls an auto starting service, they might achieve persistence or privilege escalation. Note that while ProgramData is a user controlled folder, software might apply strict ACLs which makes them only accessible to admin users. Remove such folders via filters if you experience a lot of noise.
Detects when a user enables DNS-over-HTTPS (DoH) by modifying specific registry keys for Microsoft Edge, Google Chrome, or Mozilla Firefox. Enabling DoH can obscure internet activity, potentially aiding in data exfiltration or evading network monitoring, as it encrypts DNS queries and bypasses traditional DNS visibility.
Detects changes to the Netsh registry key to add a new DLL value that is located in a suspicious location. This change might be an indication of a potential persistence attempt by adding a malicious Netsh helper.
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