Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects Node.js processes engaging in suspicious behaviors related to supply chain or second-stage attacks. This includes executing scripts from hidden .peer/ directories, accessing specific staging script filenames, and performing DNS requests or network connections to the known malicious domain data-stream.space.
Detects unauthorized access (creation, modification, renaming, or deletion) to sensitive local credential files by the Node.js runtime process (node.exe/node). This behavior is indicative of infostealers, specifically noted in the Miasma/MYRA activity associated with the Polymarket Trap campaign, where malicious packages attempt to exfiltrate AWS, SSH, NPM, Python, Docker, and GPG credentials.
Detects periodic screen captures being written to the AppData\Roaming\Screenshots directory with specific timestamped naming patterns (time_YYYYMMDD_ or wnd_YYYYMMDD_) often used by Remcos RAT to exfiltrate user activity.
This rule detects the creation or modification of files that contain common certificate-related keywords such as 'crl', 'certificate', or 'pem'. This activity could indicate the deployment of new certificates, which might be legitimate or malicious, such as for establishing command and control, code signing, or evading detection.
This rule detects an unusual number of file creations or modifications (5 or more within an hour) of executable (.exe) or dynamic link library (.dll) files within folders containing 'build' or 'release' in their path. This activity could indicate software deployment, compilation, or potentially malicious activity such as the staging of malicious executables or libraries.
Detects the creation or writing of files within AppData directories matching specific naming patterns associated with Remcos RAT activity. Remcos typically generates files with a prefix of 'time_' or 'wnd_' followed by a timestamp string in these locations to store collected data or screenshots.
Detects rapid successive password changes to the default 'admin' account on Cisco SD-WAN controllers followed by a configuration rollback. This pattern indicates an adversary attempting to temporarily modify credentials for exploitation while attempting to evade detection by reverting to the original configuration state, specifically targeting NETCONF configuration commits.
Detects the creation or manipulation of the 'troot' root-privileged backdoor account on Cisco Catalyst SD-WAN controllers, associated with the UAT-8616 exploit chain. The rule monitors for direct modification of /etc/passwd or /etc/shadow files, usage of useradd, grep operations on passwd files, and execution of su to the troot account.
Detects file creation or modification events targeting sensitive cloud credential storage locations, such as AWS credentials files, Azure configurations, and Google Cloud credentials databases. The rule filters out known legitimate CLI tools, flagging potential unauthorized access or exfiltration of cloud credentials by other processes.
Detects file creation or modification events targeting sensitive cloud credential storage locations, such as AWS credentials files, Azure configurations, and Google Cloud credentials databases. The rule filters out known legitimate CLI tools, flagging potential unauthorized access or exfiltration of cloud credentials by other processes.
Detects anomalous post-compromise activity associated with Browser-in-the-Browser (BitB) attacks or general credential theft. Specifically, it monitors for browser processes spawning suspicious child processes (e.g., cmd.exe, powershell.exe, mshta.exe) that are typically used for payload delivery, and unauthorized access to browser-stored credential files (e.g., 'Login Data') by non-browser processes.
This rule monitors for the execution and network activity of known data exfiltration tools such as WinSCP, rclone, and MegaSync. It also tracks the creation of configuration files associated with these tools and monitors DNS requests and browser navigation to known cloud storage and file-sharing destinations. This behavior is indicative of data staging and unauthorized exfiltration.
This rule detects potential re-compromise attempts by monitoring for access, file creation, or process execution associated with a set of known malicious web shell files. It correlates IIS web server logs (HTTP POST requests to shell files), EDR file modification events, and EDR process spawning events from common web server binaries (w3wp.exe, coldfusion.exe, jrun.exe) to identify persistence remaining after remediation.
Detects the modification or creation of .aspx files within the ColdFusion 'wwwroot\Images' directory. The rule flags both known webshell filenames and generic .aspx files that are not modified by the IIS worker process (w3wp.exe), which is indicative of unauthorized file manipulation or webshell deployment.
Detects artifacts associated with the Remcos RAT keylogger, specifically the creation or modification of 'logs.dat' within 'AppData\Roaming\DT' and the registration of a 'WH_KEYBOARD_LL' hook via 'SetWindowsHookEx' API calls, which is indicative of keylogging functionality.
This rule correlates rapid file modifications (potential encryption or mass deletion) with the execution of commands known to inhibit system recovery (e.g., deleting shadow copies or modifying boot recovery settings) and significant outbound network data transfers from the same host. This pattern is characteristic of ransomware deployment.
Detects instances where processes not associated with standard web browsers (e.g., node.exe) attempt to create, modify, or rename browser-related sensitive files, specifically cookie databases and DPAPI-protected Local State files. Such activity is often indicative of credential and session cookie theft.
Detects the use of PowerShell commands 'Add-MpPreference' or 'Set-MpPreference' to add the entire C drive as an exclusion path for Windows Defender. This is a common technique used by attackers to disable security monitoring for the entire file system.
Detects the presence or activity of a known malicious Chromium-based browser extension (Perplexity AI imposter, ID: flkebkiofojicogddingbdmcmkpbplcd) through monitoring file system changes in browser directories, registry modifications, or network communication with identified command-and-control infrastructure.
Detects the installation of a malicious Chromium extension masquerading as 'Search for perplexity ai'. The rule monitors for file creation events in the Chrome extensions directory matching the specific malicious extension ID, modification of the Chrome Preferences file, and outbound network connections from the browser to the identified C2 domain.
Detects the creation or modification of specific suspicious files (e.g., MediumInstStart.exe, SolidPDFCreator.dll, pcl2bmp.exe, ctxmui.dll) in common temporary or world-writable directories like ProgramData or Users/Public/Documents, which are often used by adversaries for staging tools or malware components.
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