Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the execution of known remote access tools (such as AnyDesk, TeamViewer, or RustDesk) that are spawned as child processes from common web browsers. It correlates process creation events with subsequent network connections by these tools to public IP addresses over specific ports commonly used by remote access software, within a 30-minute timeframe of the process start.
This rule monitors for node.exe processes running from the AppData directory initiating multiple network connections to non-private (external) IP addresses over common web ports (80, 443, 8080, 8443). Running Node.js from user-writable temporary directories can be an indicator of malicious activity or the execution of unauthorized web applications attempting command and control communication.
This rule detects malicious activity associated with the TinyRCT backdoor, specifically focusing on the AppDomainManager injection technique. It monitors for the presence of known malicious file names, specific process command-line arguments involving VMware paths, and known file hashes connected to the chrome_setup.zip attack chain, as well as network communication with known malicious IP addresses.
Detects HTTP requests to Microsoft 365 search endpoints containing unusually long query strings. Such patterns may indicate automated data extraction, exfiltration over alternative protocols, or unauthorized information harvesting via search parameters.
This rule detects potential data exfiltration through the Bing Image Search 'search-by-image' feature. It identifies web traffic to Bing that contains an 'imgurl' parameter, decodes the URL, and filters out legitimate Microsoft-related domains. It then flags suspicious, potentially encoded file paths or data structures that might indicate the use of this public service to exfiltrate or host staging data.
This rule detects potential Server-Side Request Forgery (SSRF) exploitation where Bing's 'search by image' functionality is abused to fetch external, non-Microsoft controlled URLs. The query monitors web proxy logs for specific Bing search parameters ('cbir=sbi' and 'imgurl') and filters out requests to trusted domains, effectively identifying attempts to use the search engine as an intermediary for unauthorized external web requests. The rule further correlates these hits with Microsoft Copilot interaction logs to identify if the activity is associated with authenticated Copilot user sessions.
Microsoft Secure Score added a recommendation to block outbound traffic from mshta.exe in Microsoft Defender for Endpoint. This reduces risk from attacks using mshta.exe, requires admin action to enable, and impacts compliance monitoring and data access.
This rule monitors for malicious Chrome extension activity involving the redirection of address bar inputs to an unauthorized domain (perplexity-ai.online). It identifies indicators of compromise across device network logs (connectivity to the malicious C2), file system events (presence of the identified malicious extension identifier), and generic device events (log entries containing the malicious extension ID or C2 URL). This pattern is indicative of a browser-based keystroke exfiltration attack.
Detects a Node.js process, spawned as a child of an IDE (e.g., VS Code, Cursor), that accesses local AWS configuration or credential files followed by an outbound network connection to a non-AWS destination. This behavior is indicative of potential cloud credential exfiltration via malicious Model Context Protocol (MCP) server execution.
This rule detects the execution of common command-line interface tools (such as PowerShell, cmd, wscript, and certutil) spawned by the SimpleHelp remote support binary ('simplehelp.exe'). It also monitors for specific network connections associated with the SimpleHelp infrastructure (IP 96.126.130.126 on port 58942) that may indicate remote support activity or misuse of the platform.
Detects execution of the SharpADWS reconnaissance tool or suspicious outbound network connections to Active Directory Web Services (ADWS) port 9389. This activity is used by threat actors, such as Mustang Panda, to perform Active Directory reconnaissance by bypassing standard LDAP logging.
Detects network connections to Zoho WorkDrive or Zoho Accounts from non-standard or suspicious processes. The rule identifies potential unauthorized data exfiltration or cloud access by flagging processes running from temporary or user-writable directories (e.g., AppData, ProgramData), processes known to be associated with specific threats, or processes exhibiting signs of binary sideloading based on their parent process ancestry.
Detects browser network events matching Tycoon2FA WebSocket interactions used to silently stream stolen session cookies back to the AiTM proxy backend. The rule specifically looks for WebSocket connections (wss:// or ws://) with a path containing '/socket.io/?EIO=' initiated by 'chrome.exe' or 'msedge.exe'.
This rule detects network connections from devices to a specific IP address (62.102.148.212) and a set of associated ports (37393, 45839, 38471, 12345, 4444, 5555). This IP address and these ports are known indicators of compromise for the Remcos Remote Access Trojan (RAT) Command and Control (C2) infrastructure. Detection of such connections indicates potential Remcos RAT activity within the environment.
Detects potential execution chains related to QR code phishing (Quishing) by monitoring for suspicious process creation or outbound network connections originating from document readers, office applications, and QR scanner utilities. It covers three primary vectors: suspicious process spawning (e.g., Office apps launching cmd or powershell), non-standard network connections from document readers, and malicious URL-based LNK files spawned via explorer.exe.
This rule detects potentially malicious behavior associated with web browser processes, including the execution of Python scripts, the loading of browser extensions from non-standard directories like AppData or Temp, the creation of Python scripts by browsers in temp folders, and outbound network connections by Python processes following browser activity. These patterns are often associated with browser-based exploitation, extension-based malware, or initial access stages where a browser is used as a conduit for malicious code execution.
Detects anomalous outbound network connections initiated by media server processes (Jellyfin, FFmpeg, or Nextcloud) immediately following an inbound video file upload (AVI) to the media server's API, indicative of post-exploitation activity related to the PixelSmash (CVE-2026-8461) heap out-of-bounds write vulnerability.
Detects the use of rclone.exe to exfiltrate files to Dropbox, specifically looking for process execution patterns and network connections to Dropbox API endpoints consistent with the Gamaredon PteroBox exfiltration module.
Detects a suspicious multi-stage infection sequence associated with DcRAT, characterized by a process spawning a child with references to image files (.jpg/.jpeg), followed by the loading of an unsigned DLL from the same directory, and culminating in a TLS network connection within a narrow time window.
This rule monitors for suspicious activity originating from Langflow-related web service processes (langflow, uvicorn, gunicorn, python). It detects the spawning of unexpected OS-level child processes (like shell interpreters), creation of suspicious files in temporary directories (e.g., /tmp, /dev/shm), and outbound network connections to known command-and-control (C2) infrastructure associated with recent Langflow exploitation attempts (CVE-2026-33017).
Detects endpoint browser and email client processes initiating network connections to domains and IP addresses associated with HolaBrief and LoopedIn open-redirect infrastructure, commonly leveraged in invoice-themed phishing campaigns.
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