Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
40,046 detections
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Detects network, HTTP, and DNS activity associated with the known three-tier delivery infrastructure (phishing sites, relay/dispatcher servers, and payload hosts) used by the threat actor UNC6671/SilverFox/Aurora. The rule distinguishes between high-confidence confirmed connections and low-confidence DNS-only events.
Detects the deletion of registry keys associated with Windows SafeBoot configuration. Adversaries may delete these keys to disrupt system recovery mechanisms, preventing administrators from booting the system into Safe Mode to diagnose or remove malicious software.
Detects the use of living-off-the-land binaries such as mshta.exe, wmic.exe, and rundll32.exe to execute commands or code indirectly. This technique is often used to bypass security restrictions that might prevent the direct execution of common command-line interpreters.
Detects the deletion of the XHOPELESS wiper executable from the filesystem, a technique commonly used by malware to remove its own traces and hinder forensic analysis after execution.
This rule monitors process command lines for identifiers related to virtual machine communication interfaces such as 'VMCI', 'AF_VSOCK', 'svm_cid', or 'vm:2'. It specifically targets both the ESET Remote Administrator (ERA) Agent and any other processes utilizing these communication mechanisms, which can be indicators of inter-process communication across virtual machine boundaries or potential hypervisor-related activity.
Detects modifications to Windows LSA and LanmanServer registry keys (RestrictAnonymous, NullSessionPipes) in conjunction with ERAAgent.exe process execution, as well as ERAAgent creating named pipes accessible by anonymous logon, which may indicate configuration tampering to facilitate unauthorized access or credential collection.
This rule monitors for the connection of specific KVM-over-IP hardware devices (e.g., PiKVM, Guermok) which can be used by an adversary to gain remote access to a system's physical keyboard, video, and mouse interface, effectively bypassing software-based security controls.
Detects the GoCaracal lightweight implant performing process injection by identifying combinations of remote process memory allocation (VirtualAllocRemoteApiCall), memory writing (WriteProcessMemoryRemoteApiCall), and remote thread creation (CreateRemoteThreadApiCall) associated with specific suspicious filenames. It also monitors command-line activity for injection-related flags.
Detects a pattern of multiple failed authentication attempts (brute force) from an external IP address followed by a successful authentication event on remote access services such as RDP, VPN, or NTLM. The rule filters for non-private IP addresses and flags successes occurring outside of standard business hours.
Detects the execution or presence of files, processes, or paths associated with the 'SnowKiller' malware or tool, as identified by keyword matching in process event logs.
Detects instances where base64-encoded PHP code, obfuscated behind a 'data:image/gif;base64' MIME type prefix, is written to the disk as a .php file or initiated by web server processes. This pattern is commonly used in file upload bypass attacks to execute arbitrary code.
This rule detects potential persistence attempts by monitoring for the execution and service installation commands of specific binaries: cplsupport.exe and wtass.exe. The rule triggers if these files are executed directly, invoked with specific command-line arguments (e.g., '--install'), or used in conjunction with the 'sc.exe' utility to create new services, which is a common technique for establishing persistence or privilege escalation.
Detects potential exploitation of PostgreSQL via logical decoding plugins, specifically targeting CVE-2026-6471. The rule monitors for the PostgreSQL server process spawning suspicious shell utilities or loading modules from locations outside of the expected PostgreSQL library or plugin directories, which is a common indicator of unauthorized code execution.
Detects attempts to modify or disable the Windows Update service (wuauserv) using command-line utilities (sc.exe, cmd.exe, powershell.exe) in a context involving 'LockAppHost.exe'. This pattern is often associated with unauthorized attempts to tamper with security update mechanisms to prevent system patching.
Detects malicious network connections, file downloads, or process execution associated with the REVSTEALER malware campaign, which utilizes hijacked YouTube channels to distribute fake game-cheat videos that lure users into downloading 'resightloader.exe' from specific malicious domains.
Detects instances where the NW.js (Node-Webkit) framework binaries (nw.exe, node.exe) spawn common command-line interpreters or script-hosting utilities (e.g., cmd.exe, powershell.exe, wscript.exe) while executing associated application files like main.js or nw.pak. This behavior is indicative of potential exploitation of a browser-based application to gain shell access or execute arbitrary code on the host system.
Detects pre-encryption activity typical of the CRPx0 ransomware, involving the destruction of Windows Volume Shadow Copies, Windows Backup Catalogs, or macOS Time Machine snapshots using system utilities such as vssadmin, wbadmin, wmic, or tmutil. This behavior is indicative of an imminent encryption phase.
Detects the creation of a large file (exceeding 4MB) named 'WindowsUpdate.log' on the system. This behavior is indicative of a masquerading attempt where a malicious PE DLL is disguised with the extension of a known legitimate log file, a technique observed in the CRPx0 ClickFix lure to evade security inspection.
Detects the creation of new executable files (DLL or EXE) that contain a certificate subject string referencing 'Microsoft' but are located outside of the standard 'C:\Windows\' directory. This behavior is indicative of an attacker attempting to bypass trust validation mechanisms by creating binaries with self-signed, fake Microsoft certificates, a technique observed in the CRPx0 builder toolset to evade EDR and AV inspection.
Detects evidence of sandbox or virtualization evasion by identifying discovery commands that query WMI hypervisor classes or common virtual machine hardware strings. This activity is considered a precursor (pre-detonation check) when followed by the execution of encoded PowerShell commands or Python scripts on the same host, which is characteristic of the CRPx0 ClickFix attack chain.
Detects evidence of sandbox or virtualization evasion by identifying discovery commands that query WMI hypervisor classes or common virtual machine hardware strings. This activity is considered a precursor (pre-detonation check) when followed by the execution of encoded PowerShell commands or Python scripts on the same host, which is characteristic of the CRPx0 ClickFix attack chain.
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