Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the drop or installation of known vulnerable drivers associated with the 'The Gentlemen' ransomware group's Bring Your Own Vulnerable Driver (BYOVD) tactics, or the creation of kernel-mode services by unsigned binaries. These techniques are often used to gain kernel-level privileges and disable security software.
This rule detects the modification or creation of sensitive Linux files often used for persistence, such as cron job configurations, system boot scripts, and custom system tools. It monitors for file writing and process execution events involving specific paths and filenames identified as associated with persistence mechanisms or monitoring tools.
This rule detects two potentially malicious activities related to SSH: first, specific utilities (e.g., luserput, blacklist, ssh) initiating outbound connections to internal network CIDR ranges over port 22, which may indicate lateral movement; second, the creation or modification of the .ssh/authorized_keys file, which is a common technique for establishing persistence or unauthorized access.
Detects potential privilege escalation and unauthorized file modification by the 'egnyteservice' account. The rule monitors Syslog for sudo usage involving the 'tee' utility with 'NOPASSWD' configuration, or suspicious writes to critical system directories such as /usr/sbin/ and /etc/cron.d/, which are indicative of VerdantBamboo threat actor activity on edge appliances.
Detects file and directory hiding techniques associated with Mustang Panda implants (e.g., SHARDLOADER, ZOHOMURK) by monitoring for the usage of 'attrib.exe' to set the hidden (+h) attribute, or the usage of 'icacls.exe' to manipulate access permissions within sensitive directories like ProgramData or AppData, which may be indicative of malicious artifact concealment.
Detects the creation or modification of common log file types (e.g., .log, .txt, .dat, .kl) by unsigned, non-standard processes executing from high-risk directories like AppData, Temp, or ProgramData. This behavior is indicative of potential keylogging activities associated with remote access trojans (RATs) such as Atlas RAT or ValleyRAT.
Detects anomalous SSH daemon (sshd) activity characterized by the installation or execution of a non-standard sshd binary (often located in /tmp or /var/tmp) or the execution of sshd with suspicious command-line arguments (custom ports or custom configuration files), followed by modifications to the authorized_keys file. This behavior is indicative of unauthorized persistence or backdoor access.
Detects file creation, modification, or renaming events affecting the 'config.db' file within the Microsoft Desktop App Installer package directory. This file is used by the AppInstaller process and unauthorized modification may indicate attempts to tamper with installed applications or app installation settings.
Detects the use of PowerShell, PWSH, or CMD to modify file system timestamps, a technique commonly referred to as timestomping. This is often used by adversaries to hide malicious file activity or blend in with legitimate system files by manipulating file creation, modification, or access time metadata.
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.
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