Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects potential ransomware activity by identifying processes that perform a high volume of file write, create, or rename operations across a large number of unique file paths within a short timeframe. It also includes a heuristic check for filenames containing 'inc' or 'lynx', often associated with specific ransomware variants.
Detects the use of PowerShell to manually modify file system timestamps (CreationTime, LastWriteTime, LastAccessTime) on ASPX files or within common web-accessible directories. This technique is often used by adversaries to hide the true creation or modification time of webshells, facilitating anti-forensic activities and timeline corruption.
Detects artifacts and activity related to the exploitation of CVE-2026-55200 in libssh2. The rule monitors for the creation or execution of identified libpwn exploit harness files and scripts, as well as suspicious network activity involving TCP port 2222, which is the default port for the PoC rogue SSH server. It also correlates the appearance of these exploit files with subsequent outbound SSH connections.
This rule detects the creation of executable script files (.aspx, .php) within the webroot images directory or identifies known specific filenames associated with web shells. This behavior is indicative of an adversary attempting to establish a web shell for persistent access or command execution on a web server.
This rule detects suspicious activity on Linux systems including unauthorized modification of SSH authorized_keys, creation of unauthorized system accounts (e.g., 'troot'), manipulation of critical system files like /etc/passwd or /etc/shadow, and the execution of specific suspicious scripts or commands indicative of an exploit or post-exploitation activity.
Detects file creation or write access to C:\Windows\System32\sethc.exe or sethc.exe.bak, indicating a sticky keys backdoor technique where an attacker replaces the Sticky Keys binary with cmd.exe or another shell to obtain a SYSTEM-level shell at the login screen.
Detects suspicious activities originating from OpenVPN Connect processes, including the spawning of command-line interfaces, scripts, or proxies, as well as the creation of specific ACE marker files and modifications to browser proxy settings, which are indicative of potential exploitation or post-exploitation activity.
Detects the creation of files named 'WC3' or 'wt1' within the 'C:\ProgramData' directory. These filenames are associated with the UAC-0226 threat actor's delivery chain, specifically involving an encoded PowerShell loader (WC3) and an arithmetic-encoded GIFTEDCROOK payload (wt1). These files are typically dropped via path traversal exploitation (CVE-2025-8088) using WinRAR NTFS alternate data streams.
Detects modifications to Chrome or Chromium browser preference files that indicate either the installation of a specific malicious extension or the overriding of the default search provider to a known suspicious domain (perplexity-ai.online). This indicates potential browser-based persistence or search hijacking.
Detects unauthorized processes (non-browser related) attempting to modify Chrome/Chromium user profile preference files or sensitive browser registry keys related to search providers and security MACs. This activity is often associated with browser hijacking, malware persistence, or unauthorized manipulation of browser settings.
This rule detects the execution of tools associated with HTTP/2 upgrade queue poisoning proof-of-concept (PoC) code or anomalous process-level interactions involving nghttpx. It tracks specific command-line strings, file operations, and unauthorized spawned sub-processes originating from nghttpx, which could indicate attempts to exploit request smuggling vulnerabilities in HTTP/2 implementations.
Detects indicators of the SystemInformer PHSVC (Process Hacker Service) local privilege escalation proof-of-concept. The rule monitors for the loading of the PoC DLL by rundll32, the execution of commands containing specific PoC strings, and the spawning of shell processes by PHSVC-related parent processes.
Detects the creation or modification of opportunistic locks (oplocks) involving Wermgr.exe copies located within Volume Shadow Copies or temporary directories using specifically crafted file streams (:WDFOO). This activity is a known technique used to perform Time-of-Check Time-of-Use (TOCTOU) race condition attacks to suspend security software or hold open race windows to evade detection by Windows Defender.
Detects suspicious modifications to GitHub Actions workflows, such as unauthorized file overwrites, commits by bot impersonation identities (e.g., dependabot, renovate), or the upload of sensitive artifacts like 'format-results.txt'. These activities are indicative of IronWorm-style attacks targeting CI/CD pipelines to exfiltrate secrets via build artifacts.
Detects indicators of the BUMSRAKETE FreeBSD kernel-level exploit (CVE-2026-45257). This rule monitors for exploit artifact file creation, malicious use of dd to overwrite SUID binaries for privilege escalation, kernel configuration enumeration via sysctl, spawning of shell processes with root UID from suid-related binaries, and kernel version fingerprinting.
Detects the creation of a potentially malicious shared library (libcache.so) in /usr/local/lib followed by a modification of the /etc/ld.so.preload file on Linux systems within a short time frame. This technique is commonly used for persistence and code injection, where the dynamic linker is forced to load the malicious library before others.
Detects indicators of persistence via dynamic linker hijacking on Linux systems, specifically looking for the creation or usage of .libcache.so, modifications to /etc/ld.so.preload, hidden shell profile droppers, or node process execution utilizing LD_PRELOAD variables.
This rule detects potentially suspicious process creation or file modification activities associated with Autodesk applications or generic 'appcompat' paths. The detection logic flags processes executing with the '-uiDll' command-line argument and specific file operations (Creation/Modification) involving configuration or log files, often associated with unauthorized software tampering or suspicious binary execution patterns.
Detects the exploitation of the CVE-2025-8088 vulnerability in WinRAR, where a path traversal technique is used to extract malicious files directly into the Windows Startup folder. This pattern is associated with threat actors like Gamaredon to achieve persistence, typically by placing HTA downloaders that execute upon user logon.
Detects instances where DllHost.exe creates or writes executable, script, or library files into common user-writable directories (e.g., C:\Users\*, C:\ProgramData\*, C:\Temp\*). This behavior is often associated with file staging or the delivery of malicious payloads. The rule also checks if the DllHost.exe process was spawned by WSL (Windows Subsystem for Linux) related processes, which can be indicative of cross-environment execution or evasion techniques.
Detects execution and file artifacts associated with the GSocket (gs-netcat) utility, often used by threat actors like Velvet Ant (Operation Highland) for establishing SOCKS proxies, tunneling, and persistent remote access. The rule monitors process creation, file modifications, and network connections related to the tool's binary names, command-line arguments, and specific file paths.
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