Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the use of the 'SecTrustSetAnchorCertificatesOnly' macOS Security framework API call. This API is used to restrict trust to only the anchor certificates provided, which is a technique often used by malware or malicious scripts to bypass security trust controls, intercept TLS/SSL traffic, or facilitate adversary-in-the-middle attacks.
This rule detects the suspicious loading of gdi32.dll and the execution of BitBlt functions (CreateBitmap or BitBlt) by the process MpExtMs.exe. This pattern is indicative of the Backdoor.Mistic malware, which uses these GDI functions to perform unauthorized screen captures.
Detects memory patching operations targeting 'ntdll.dll', specifically aiming to disable ETW (Event Tracing for Windows) by modifying 'EtwEventWrite' or 'NtTraceEvent' functions. This activity is filtered to detect processes originating from PyInstaller-compiled binaries, identified by the use of '_MEI' temporary extraction directories or specific process names like 'winupdate.exe', which are commonly associated with malicious use of the PyInstaller framework.
Detects potential surveillance activity by monitoring for screenshot image files written to suspicious directories (such as Temp or AppData) by non-whitelisted processes, and identifies unauthorized access to camera or video capture devices by processes that are not standard conferencing or imaging software. This rule is designed to detect capabilities often associated with Remote Access Trojans (RATs) such as AtlasRAT and ValleyRAT.
Detects the loading of an eBPF rootkit by Node.js or NPM processes. This rule monitors for file creation events within the /sys/fs/bpf/ directory triggered by these processes, which is a known behavior of the IronWorm infostealer attempting to hide processes and network connections.
This rule identifies potentially malicious activity where a process, which has been dormant on the system for at least 7 days since its initial start, suddenly performs a high volume (more than 50 events in 60 seconds) of file creation or modification events. This behavior pattern is often indicative of ransomware encryption activities, where malware lies dormant before initiating a rapid, destructive encryption cycle.
This rule detects the presence of files or processes with known malicious SHA256 or MD5 hashes. It queries both DeviceProcessEvents and DeviceFileEvents to identify if any file or running process matches the provided list of malicious hashes.
Detects PowerShell reading image files and loading their contents directly into memory as .NET assemblies, a stealth technique used to hide malicious payloads inside benign-looking files.
Detects the modification or termination of critical Windows security services using the Service Control utility (sc.exe).
Detects repeated execution of the 'pbpaste' command initiated by the 'Finder' application where the parent process path originates from within the '/Library/Application Support/' directory. This behavior is indicative of a potentially malicious macOS plug-in or background component attempting to periodically monitor and extract clipboard data.
Detects a process masquerading as 'Finder' (i.e., having a different file path than the legitimate macOS Finder) that attempts to open System Settings, System Preferences, or the 'open' command to interact with Apple System Preferences related to Full Disk Access or Security settings. This behavior is indicative of an adversary attempting to modify privacy permissions or bypass system security controls.
Detects instances where 'Script Editor' or processes containing 'Maccy' in their command line access specific timezone files in /usr/share/zoneinfo. This behavior is indicative of potential environment checks for virtualization or sandbox detection, as attackers may attempt to identify or spoof the system's timezone to evade security analysis.
Detects instances where a process obtains a handle with PROCESS_VM_WRITE access to another process, followed shortly thereafter by a WriteProcessMemory operation into that same target process. This behavior is indicative of potential process injection, such as hooking remote GUI processes or other memory-based manipulation techniques.
Detects the execution of known diagnostic, debugging, or analysis tools (such as IDA Pro, Process Hacker, Wireshark, etc.) by processes other than standard Windows system processes. This behavior may indicate an adversary conducting reconnaissance, attempting to bypass protections, or analyzing system artifacts.
Detects unsigned or non-Microsoft processes attempting to access sensitive system process memory (lsass.exe, winlogon.exe, services.exe) or processes attempting to enable SeDebugPrivilege, which are common indicators of credential dumping or process injection attempts.
This rule detects activities associated with VILE ransomware, focusing on unsigned Go-based binaries. It flags processes performing cross-process operations, creating specific file artifacts (e.g., vile_deadlines.json, vile_Decryptor), or invoking direct NT system calls such as NtCreateWaitCompletionPacket to evade EDR hooks.
Detects reconnaissance activities where known binary analysis tools or scripts scan the AnyDesk 9.7.6 runtime binary for specific PE markers (e.g., COM interface IDs, adprinterpipe string) associated with a known LPE vulnerability. This behavior indicates an attacker is fingerprinting the application to prepare for exploitation.
Detects Remcos RAT-related User Account Control (UAC) bypass activity. The rule identifies suspicious process creation and cross-process patterns where non-Microsoft signed executables, specifically those often masquerading as explorer.exe or interacting with system-level binaries (e.g., iexplore.exe, svchost.exe, fsutil.exe), attempt to elevate privileges using COM interfaces such as CMSTPLUA.
Detects evidence of the MYRA Linux RAT attempting to establish persistence via the LD_PRELOAD environment variable mechanism. The rule monitors for the creation or modification of specific malicious library files (libcache.so, .sh.local) and the execution of processes utilizing LD_PRELOAD to hijack dynamic linker operations.
This rule detects an unusually high number of registry access events initiated by common Windows system utilities such as 'reg.exe', 'regsvcs.exe', or 'regasm.exe' within a one-hour window. A count of 5 or more registry access events from these processes is considered suspicious and may indicate malicious activity like persistence, defense evasion, or privilege escalation through registry modification.
This rule detects persistence mechanisms and fileless execution patterns commonly associated with the MYRA malware family on Linux systems. It specifically monitors for malicious cron job creation, LD_PRELOAD library manipulation, unauthorized shell profile modifications, and memfd-based execution spawned from Node.js or npm processes.
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