Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
7,138 detections
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Detects attempts to exploit the sudo vulnerability CVE-2019-14287, which allows a user to run commands as root without authentication by specifying a user ID of -1 or 4294967295.
Detects the creation of the 'shai-hulud-workflow.yml' file, which is associated with the Shai Hulud worm. This worm targets the NPM supply chain and is designed to exfiltrate GitHub secrets. The rule specifically looks for the creation of this file within the '.github/workflows/' directory.
Detects suspicious changes to file privileges using `chown` to set ownership to root and `chmod` to enable setuid (u+s) or setgid (g+s) bits. This activity can be indicative of privilege escalation or persistence mechanisms where an adversary attempts to run code with elevated privileges.
This rule detects PHP webshells that utilize a specific obfuscation technique. It looks for PHP code that concatenates strings using apostrophes and dots, where each string segment is 1 to 3 alphanumeric characters long. This pattern is indicative of an attempt to hide malicious code within a PHP file.
Detects the command line executed when TeamViewer starts a session initiated by a remote host. An investigator can verify connection details by viewing the "incoming_connections.txt" log file in the TeamViewer folder.
KQL Query
This rule detects the presence of source code files associated with the Suterusu Rootkit. It looks for specific function definitions ('hijack_start', 'hijack_pause', 'hijack_resume', 'hijack_stop') typically found in 'common.h', print strings related to rootkit functionality ('Dropping to root shell', 'Hiding TCPv4 port %hu', 'Unhiding TCPv6 port %hu', 'Enabling module loading', 'Silently prohibiting module loading') from 'sock.c', and a define statement ('#define SUTERUSU_INIT_WORK') from 'dlexec.c'. The rule triggers if at least three of the function definitions are found, or any of the print strings, or the define statement.
This rule identifies modifications to the `/etc/ld.so.preload` file. This file is used by the Linux dynamic linker to specify shared libraries that should be loaded before any other libraries. Attackers can modify this file to inject malicious shared objects into processes, enabling privilege escalation, persistence, or defense evasion by loading arbitrary code.
This rule detects the creation or modification of the `/etc/ld.so.preload` file. This file is used by the dynamic linker (`ld.so`) on Linux systems to specify shared libraries that should be loaded before any other libraries. Adversaries can leverage this mechanism for persistence, privilege escalation, or defense evasion by preloading malicious libraries, effectively hijacking legitimate functions. Refer to `man ld.so` for more details on its functionality.
Detects the creation of doas.conf file in linux host platform.
Detects the Node Package Manager (npm) or npx spawning child processes commonly used to download remote files. This behavior is often seen in malicious npm packages that use post-install scripts to fetch and execute second-stage payloads, as seen with the AdaptixC2 framework delivery.
Detects known malicious file hashes associated with malware families (VIDAR, LUMMAC.V2, RADTHIEF, ATOMIC) distributed by the threat actor UNC5142.
The analytic detects the use of the curl command contacting suspicious remote domains, such as s3.amazonaws.com, which is indicative of Command and Control (C2) activity or downloading further implants. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs and command-line arguments. This activity is significant as it may indicate the presence of MacOS adware or other malicious software attempting to establish persistence or exfiltrate data. If confirmed malicious, this could allow attackers to maintain control over the compromised system and deploy additional payloads.
This analytic detects suspicious data transfer activities involving the use of the `split` syscall with the `-b` option, which specifies the size of each output file. This technique can be used by attackers to evade detection by breaking large files into smaller parts, bypassing size-based security controls, and facilitating covert exfiltration of sensitive data. By monitoring for unusual or unauthorized use of the `split` syscall with a specified block size, this analytic helps identify potential data exfiltration attempts.
Detects the use of `systemctl mask` to disable system power management targets such as suspend, hibernate, or hybrid sleep. Adversaries may mask these targets to prevent a system from entering sleep or shutdown states, ensuring their malicious processes remain active and uninterrupted. This behavior can be associated with persistence or defense evasion, as it impairs normal system power operations to maintain long-term access or avoid termination of malicious activity.
The analytic detects the use of SSH to move laterally and execute a script or file on a remote host. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on specific SSH command-line parameters and URLs. This activity is significant as it may indicate an attacker attempting to execute remote commands or scripts, potentially leading to unauthorized access or control over additional systems. If confirmed malicious, this could result in lateral movement, privilege escalation, or the execution of malicious payloads, compromising the security of the network.
Detects the modification of common WordPress PHP files to include content characteristic of the UNC5142 CLEARSHORT infection chain. This activity is indicative of a compromised web server. This rule requires a File Integrity Monitoring (FIM) solution or EDR that can inspect the contents of modified files.
This analytic is designed to identify attempts to exploit a server-side template injection vulnerability in CrushFTP, designated as CVE-2024-4040. This severe vulnerability enables unauthenticated remote attackers to access and read files beyond the VFS Sandbox, circumvent authentication protocols, and execute arbitrary commands on the affected server. The issue impacts all versions of CrushFTP up to 10.7.1 and 11.1.0 on all supported platforms. It is highly recommended to apply patches immediately to prevent unauthorized access to the system and avoid potential data compromises. The search specifically looks for patterns in the raw log data that match the exploitation attempts, including READ or WRITE actions, and extracts relevant information such as the protocol, session ID, user, IP address, HTTP method, and the URI queried. It then evaluates these logs to confirm traces of exploitation based on the presence of specific keywords and the originating IP address, counting and sorting these events for further analysis.
Detects when a Visual Studio Code configuration file is modified, followed by the execution of a shell or networking tool by VS Code. This pattern may indicate abuse of GitHub Copilot via prompt injection (CVE-2025-53773) to achieve remote code execution.
Detects the execution of the 'sudo' command with the '--chroot' option, which is used to change the root directory for command execution. Attackers may use this technique to evade detection and execute commands in a modified environment. This can be part of a privilege escalation strategy, as it allows the execution of commands with elevated privileges in a controlled environment as seen in CVE-2025-32463. While investigating, look out for unusual or unexpected use of 'sudo --chroot' in conjunction with other commands or scripts such as execution from temporary directories or unusual user accounts.
This correlation rule identifies multiple risk events associated with the "Living Off The Land" analytic story. It aggregates and correlates events tagged under this story, focusing on systems with a high count of distinct sources (5 or more). The rule aims to detect suspicious behavior involving the use of legitimate tools for malicious purposes, which could lead to code execution, privilege escalation, or persistence within an environment.
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