Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
18,132 detections
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Detects indicators of the MYRA rootkit, specifically the creation of a hidden shared library in /usr/local/lib/, persistence via a shell script in /etc/profile.d/, and the execution of processes utilizing the LD_PRELOAD environment variable to load the malicious library.
Detects potential process impersonation by monitoring for suspicious named pipe creation followed by system-level process spawning.
Detects suspicious Registry value modifications under HKEY_CURRENT_USER\SOFTWARE by processes like svchost.exe or iexplore.exe, involving specific keys associated with configuration (exepath, WD, FR, licence). This behavior is indicative of potential malware persistence or configuration manipulation.
Detects cross-process injection activity targeting Internet Explorer related processes (iexplore.exe, ieinstal.exe, ielowutil.exe). The rule monitors for unauthorized processes that are not signed by trusted publishers (Microsoft, Google, Mozilla) performing injection-like behavior, typically associated with Remcos RAT and its use of techniques such as process hollowing or thread execution hijacking.
Detects suspicious behavior associated with Remcos RAT, including UAC bypass techniques using ICMLuaUtil, process injection into system binaries, and persistence mechanism creation in the Windows registry.
Detects suspicious modifications to Registry Run and RunOnce keys that include common scripting or command execution keywords (powershell, cmd, .bat). This activity is often associated with persistence mechanisms where adversaries attempt to execute malicious code upon user login.
This rule detects a high volume of process creation events (EventID 4688) where the command line contains keywords indicative of patching or updating activity (e.g., 'patch', 'update', 'KB', 'hotfix'). Specifically, it triggers if 3 or more such events occur on a single computer within an hour. This could indicate legitimate system updates, but also potentially malicious activity masquerading as updates to evade detection or perform unauthorized actions.
This rule detects an unusually high volume (10 or more within an hour) of permission changes to files or registry keys by a single user. This activity can be indicative of an adversary attempting to modify access controls to facilitate persistence, privilege escalation, or defense evasion.
This rule detects changes to the domain password policy by monitoring Windows Security Event ID 4739. It summarizes these events by the user who made the change and the time, providing an hourly count of policy modifications. This can help identify unauthorized or suspicious alterations to critical security policies.
This rule detects a spike in modifications or creations of Azure Diagnostic Settings within a one-hour window. A high volume of 'Diagnostic Setting' operations by a single caller could indicate an attempt to alter logging configurations, potentially to impair defenses or hide malicious activity.
This rule detects anomalous process execution patterns associated with Remcos RAT, specifically monitoring for the spawning of 'rmclient.exe', unauthorized spawning of 'fsutil.exe', or 'svchost.exe' being launched by processes other than system-critical services. These patterns are characteristic of Remcos RAT deploying its watchdog or performing process injection.
Detects Microsoft Office applications (Word, Excel, PowerPoint) and WordPad spawning command-line interpreters (mshta, wscript, cscript, cmd, powershell, pwsh). This behavior is often associated with macro-based malware or malicious document attachments attempting to execute scripts or shell commands to facilitate further infection stages.
This rule detects an unusually high volume of registry access events (Event ID 4656) targeting either the 'HKLM' (HKEY_LOCAL_MACHINE) hive or 'System Registry' within a one-hour window. A count of 10 or more such events by a single user on a specific computer within an hour is considered suspicious. This activity could indicate an adversary attempting to enumerate system configurations, modify system settings for persistence, or gather information.
This rule detects potential process injection attempts by monitoring Security Event ID 4688 (A new process has been created) for command-line arguments containing 'CreateRemoteThread' or 'VirtualAllocEx'. These API calls are commonly used in various process injection techniques to allocate memory and create threads in a remote process, allowing an attacker to execute arbitrary code within another process's context.
This rule detects when a user account repeatedly (3 or more times within an hour) requests either 'SeDebugPrivilege' or 'SeImpersonatePrivilege' (Event ID 4672). This behavior can be indicative of an attacker attempting to escalate privileges or manipulate access tokens, often seen in techniques like token impersonation or debugging processes for malicious purposes.
Detects Remcos RAT watchdog activity characterized by process injection into system binaries (svchost.exe, rmclient.exe, fsutil.exe) to relaunch the main payload from non-standard directories (AppData, Temp, ProgramData), or a self-resurrection loop where the malware spawns a child process with an identical file path to maintain execution after termination.
Detects the use of the BITSAdmin utility to transfer files or set notification command lines. BITSAdmin is a legitimate Windows utility often abused by adversaries to download malicious files or achieve persistence/execution via BITS jobs.
Detects updates or deletions of Azure Active Directory (Entra ID) Conditional Access policies that occur outside of typical business hours (Monday-Friday 08:00-18:00 UTC). Such modifications can be an indicator of an adversary attempting to circumvent security controls or maintain persistent, unauthorized access.
This rule detects the creation of named pipes or mutexes with GUID-like naming patterns by non-system processes. Threat actors frequently use uniquely generated GUIDs for IPC mechanisms like named pipes and mutexes to coordinate between processes or to check for existing infection, often to avoid detection by using non-obvious names.
Detects anomalous activities targeting SaaS CRM applications (Salesforce, Microsoft Dynamics 365, HubSpot), including high-volume bulk exports, off-hours access, mass API queries for sensitive objects, and suspicious OAuth token grants.
Detects instances where a non-SYSTEM parent process spawns a child process running as SYSTEM, characteristic of 'Potato' family exploits (e.g., JuicyPotato, PrintSpoofer) leveraging SeImpersonatePrivilege to elevate privileges. The rule specifically filters for known legitimate SYSTEM process spawners while highlighting suspicious parent-child process relationships.
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