Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects shell processes (sh or bash) being spawned from suspicious, commonly writable directories (e.g., /tmp, /dev/shm) within a short window of file system activity (creation, modification, or deletion) and associated MQTT protocol network communication. This pattern is indicative of potential malware staging or command-and-control activity on Linux systems.
Detects the execution of wmic.exe, powershell.exe, or pwsh.exe with command-line arguments related to querying antivirus products or security centers (e.g., AntiVirusProduct, SecurityCenter2). The rule focuses on executions originating from non-standard system paths (e.g., Temp, Users, AppData) or processes that lack a valid code signing signature, which is often indicative of reconnaissance by malicious actors.
Detects the Kimsuky APT-C-55 'Stella_Gary' attack chain, where PowerShell is used to download a JavaScript verification script from an external C2 (InfinityFree), followed by the execution of that script via cscript.exe in temporary directories. This behavior is used to bypass anti-bot mechanisms and retrieve secondary payloads from hardcoded C2 infrastructure.
Detects the use of PowerShell to load .NET Windows Forms and Drawing assemblies to perform screen captures. This behavior is associated with the VelvetCake second-stage module, which uses these libraries to capture full display screenshots and save them as timestamped PNG files to temporary directories.
Detects the RevStealer malware family using an Electron-based loader to perform anti-sandbox host validation. The loader attempts to identify virtualized environments by querying GPU hardware information using wmic or PowerShell CIM/WMI commands before proceeding to disable security features or launch the payload.
Detects the creation of a scheduled task named 'OneDriveUpdateScheduler' or the execution of a related VBScript, which are commonly used by adversaries for persistence and code execution. This rule monitors process creation events for indicators of malicious task scheduling or script execution mimicking legitimate update processes.
Detects the 'prl_disp_service' process spawning 'tar' with the '--use-compress-program' flag set to an unconventional binary. This behavior is associated with the exploitation of ParaShells (CVE-2026-90894), where an attacker leverages the compression program hook in 'tar' to execute arbitrary commands with root privileges.
Detects execution of potentially suspicious processes ('Launcher.exe' or 'GapiUpdate.exe') originating from ClickOnce-related processes ('dfsvc.exe' or 'rundll32.exe' with 'dfshim.dll'). ClickOnce is often abused to proxy execution of malicious code, allowing adversaries to execute applications from user-writable directories without administrative privileges.
This rule detects potentially malicious activities aimed at credential harvesting and system recovery inhibition. It monitors for the execution of vssadmin.exe with arguments to list shadow copies (often a precursor to deletion) or references to DPAPI master keys in command lines. Additionally, it identifies unauthorized processes attempting to access sensitive browser-based credential files (e.g., Login Data, Cookies, key4.db) from standard browser installation paths, specifically excluding legitimate browser and update processes.
Detects the loading of 'libcurl.dll' or related DLL patterns from suspicious directories such as '\Microsoft\Crypto\RuntimeBroker\', often associated with process masquerading or side-loading activities. The rule also monitors for the execution of suspicious binaries ('Tax_Notice_45594.exe') or binaries that mimic 'Notepad++' metadata from within these paths.
Detects the execution of suspicious image files (often masquerading as lures) using explorer.exe from the user Downloads directory. This is a common pattern for launching malicious payloads delivered via phishing.
Detects the execution or invocation of processes matching a known list of malicious file hashes (SHA256). The rule monitors both direct execution (SHA256) and instances where a malicious file acts as an initiating process.
This rule monitors DeviceFileEvents and DeviceProcessEvents for the execution or presence of files matching a predefined list of known malicious SHA256 hashes.
Detects automated searching (via grep, findstr, or select-string) for sensitive strings (e.g., API keys, private keys, wallet data) across multiple occurrences on a single host, or the creation of suspicious sensitive files (e.g., .env, credentials, wallet.dat) on devices where such automated sweeping activity has been observed. This pattern indicates an adversary staging data for exfiltration.
Detects automated searching (via grep, findstr, or select-string) for sensitive strings (e.g., API keys, private keys, wallet data) across multiple occurrences on a single host, or the creation of suspicious sensitive files (e.g., .env, credentials, wallet.dat) on devices where such automated sweeping activity has been observed. This pattern indicates an adversary staging data for exfiltration.
Detects suspicious process execution patterns originating from Langflow or Nacos AI orchestration services, including the spawning of sensitive binaries like cmd, powershell, or scripts (python/bash/sh) with suspicious command-line arguments. Additionally, it identifies potential exploitation attempts targeting known-vulnerable API endpoints (code validation and Nacos user authentication).
Detects rapid, non-interactive ransomware-like behavior characterized by system reconnaissance followed by automated bulk file deletion of model/data files (e.g., .ckpt, .pt). The rule identifies campaigns where discovery, lateral movement or automated execution, and destructive impact occur within a 3-hour window without any interactive user login evidence.
Detects rapid, non-interactive ransomware-like behavior characterized by system reconnaissance followed by automated bulk file deletion of model/data files (e.g., .ckpt, .pt). The rule identifies campaigns where discovery, lateral movement or automated execution, and destructive impact occur within a 3-hour window without any interactive user login evidence.
Detects suspicious activity related to the Windows Subsystem for Linux (WSL), such as installing new distributions (especially penetration testing ones like Kali), importing custom images, or executing commands non-interactively. Attackers may use WSL to run malicious Linux binaries, hide artifacts, and evade defenses.
Detects msiexec.exe executing from the Temp directory with suspicious command-line arguments (such as hidden windows) and spawning child processes like cmd.exe, tasklist.exe, or taskkill.exe. This behavior is often indicative of malicious installation scripts attempting to perform discovery or terminate security processes while remaining stealthy.
This rule detects potential web shell creation on a Microsoft Exchange server by monitoring for suspicious child processes spawned by the IIS web server process (w3wp.exe) that correlate with the creation or modification of web-accessible script files (.aspx, .ashx, .asp, .dll) within the Exchange virtual directories (ecp, owa, aspnet_client). This pattern is consistent with common post-exploitation activities used by attackers to gain persistent access via web shells.
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