Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects a suspicious volume of image file creation events (more than 3) within the 'C:\Users\Public\Videos\' directory, matching a pattern commonly used for automated screen capture tools.
Detects activity associated with the 'MiniBrowse.exe' process, which exhibits behaviors characteristic of unauthorized browser credential and cookie harvesting. This includes targeting browser 'Login Data' files, accessing cookies, attempting to interact with legitimate browser processes (chrome.exe, msedge.exe) via cross-process operations, and writing logs to 'edgeLog.txt'.
This rule detects potential persistence mechanisms on Windows systems by monitoring for the creation or modification of registry run keys, the use of 'reg.exe' to add entries to run keys, and the creation of shortcut files (.lnk) in the Windows Startup directory.
Detects the creation of unrecognized Go-compiled binaries by common developer tools (e.g., node.exe, code.exe) in user-writable or temporary directories, followed shortly by outbound network connections to known C2 infrastructure (e.g., vercel.app, jsonkeeper.com). This behavior is consistent with the 'Contagious Interview' campaign attributed to the Lazarus Group.
This rule monitors Sysmon Event ID 11 (FileCreate) to detect high-volume file creation activity across multiple unique directories. By filtering out common file types, it identifies potential signs of mass file modification, staging for exfiltration, or malicious encryption characteristic of ransomware or data destructive operations.
Detects specific persistence artifacts associated with LARP53RAT, including unauthorized file shortcuts in the Startup folder, modifications to RunOnce registry keys for system recovery, and suspicious scheduled task creation masquerading as Microsoft Edge updates.
Detects the creation or modification of known malicious files associated with the StegoAd (DarkSpectre) campaign. The rule monitors popular Chromium-based browsers (Chrome, Edge, Brave) dropping specific files like 'msn.woff' (malicious font), WebP containers (steganography), and 'setting.conf' (C2 configuration) into browser-related directories such as AppData or extension storage folders.
Detects evidence of exploitation attempts related to the hypothetical CVE-2026-55200 vulnerability. The rule monitors for known exploit file names, command-line arguments, and specific network patterns targeting SSH ports (22, 2222) that indicate potential LibSSH2 exploitation.
Detects exploitation attempts against the Flowise Model Context Protocol (MCP) environment, specifically targeting the node_options case-sensitivity bypass (CVE-2026-20182). The rule monitors for malicious node child process spawning, command line injection via the --require flag, suspicious file creation (flowise_marker.txt), and unauthorized outbound network connections from the Flowise process.
Detects anomalous activities associated with the CitrixBleed2 campaign where the ScreenConnect remote access tool is used to deploy or execute QEMU virtual machine artifacts. The rule monitors for the spawning of virtualization binaries (e.g., qemu-system-x86_64) via the ScreenConnect service, the dropping of QEMU-related files into ScreenConnect directories, and the suspicious creation of local administrator accounts (CtxAppVCOMService).
This rule detects potential data exfiltration by monitoring for the creation of zip archives followed by an network connection to Telegram's API by the same device within a 10-minute window. This behavior often indicates that a user or an attacker is staging data in an archive and subsequently uploading it to a cloud file-sharing service.
Detects techniques used by adversaries to hide files, directories, or modify access permissions on Windows systems. This includes the use of 'attrib.exe' to set the hidden attribute, PowerShell cmdlets to set file attributes, 'icacls' to modify or deny permissions, and the creation of hidden Unix-style dot-prefixed files within common Windows user directories.
Detects evidence of arbitrary command execution originating from OpenVPN Connect, potentially via an echoed script payload that executes commands upon disconnect, bypassing security controls. The rule identifies suspicious child processes spawned by OpenVPNConnect.exe and detects the creation of a known proof-of-concept marker file.
Detects artifacts, execution patterns, and post-exploitation behaviors associated with the exploitation of the libssh2 heap out-of-bounds write vulnerability (CVE-2026-55200). The rule monitors for the presence of known proof-of-concept files, malicious SSH server orchestration via Python, outbound network traffic to the PoC's default non-standard port (2222) from SSH-capable applications, and post-exploitation shell or calculator spawns.
Detects artifacts and network activity associated with a malicious Chromium extension (ID: flkebkiofojicogddingbdmcmkpbplcd) that uses declarativeNetRequest rules to redirect browser search traffic to a typosquatted domain (perplexity-ai.online). The rule correlates file creation, registry modifications, and outbound network connections to the malicious domain from common web browsers.
Detects the presence of malicious Chromium browser extension artifacts related to the 'Search for perplexity ai' extension. This extension abuses Manifest V3 declarativeNetRequest permissions (such as declarativeNetRequestFeedback and declarativeNetRequestWithHostAccess) to intercept and redirect network requests to the attacker-controlled domain 'perplexity-ai.online'. The rule specifically identifies the extension's rule resource files (e.g., perplexity-rules.json) and specific file paths associated with the extension ID.
This rule detects the creation of files with NTFS Alternate Data Streams (ADS). Adversaries often use ADS to hide malicious payloads or tools within the file metadata of legitimate-looking files to evade static analysis and security monitoring.
Detects malicious activity related to the 'RoguePlanet' exploit (referencing CVE-2026-50656) which involves manipulating NTFS junctions to redirect system file operations. The rule monitors for specific staging directory patterns (RP_<UUID>), the creation of named pipes associated with RoguePlanet, and the execution of suspicious binaries or staging of files in system paths.
Detects suspected RomulusLoader activity by identifying the sideloading of 'vulkan-1.dll' from non-standard directories, the creation of encrypted 'vulkan-1.bin' payload files, and the loading of unsigned DLLs from user-writable directories (Temp/AppData) by otherwise signed processes.
Detects the creation of log or data files in temporary directories (e.g., AppData, Temp) by non-standard processes. This behavior is indicative of keylogging activity performed by malware families such as Atlas RAT and Gh0stRAT, commonly associated with the threat actor TA4922.
Detects BQTLock ransomware activity where the BQT.exe process accesses browser credential stores (Chrome, Firefox, Opera) and writes the extracted data to a temporary file at C:\Windows\Temp\bqt_passwords.txt.
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