Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
1,208 detections
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Detects the execution of the Chisel client establishing a reverse SOCKS tunnel with authentication. This activity is often associated with adversaries using Chisel for command and control or data exfiltration.
Detects REDCap-associated PHP or web server processes launching operating system command interpreters. GTIG observed INFINITERED using trojanised REDCap components and web shell functionality to execute arbitrary shell commands. This behaviour is highly unusual for normal REDCap operations and may indicate post-exploitation activity.
Detects PHP or web server processes launching archive and compression utilities. A compromised web application may use these tools to package REDCap files, database exports, credentials, or research data before exfiltration. This behaviour should be rare outside documented backup or deployment activity.
Detects web server processes (IIS/Nginx) spawning native Windows or Linux shells (cmd.exe, sh), immediately followed by reconnaissance or download tool execution.
This rule detects potential credential exposure by identifying HTTP requests to IIS servers (W3CIISLog) that contain keywords like 'password' or 'token' in the URI query string, with a successful status code (200). This could indicate sensitive information being passed insecurely.
Detects use of WHOIS web services for domain property enumeration
Correlates a script connecting to an LLM API and immediately piping the response or executing rapid shell commands (cmd/bash) representing AI-generated reconnaissance or exploit execution.
Identifies dfshim.dll invoked via ShOpenVerbApplication processing the fake Adobe manifest parameters.
This rule detects suspicious downloads of Python packages from pypi.org or pypi.python.org by pip or python executables. It specifically looks for a high volume (5 or more) of downloads of common package names (numpy, requests, pandas, util, common) within a one-hour window from a single device. This could indicate an attempt to compromise the software supply chain by introducing malicious versions of popular packages.
This rule detects potential credential harvesting attempts by identifying a high volume of short-duration HTTP requests to common login, sign-in, verify, account, or authentication URI stems. It specifically looks for requests originating from user agents commonly associated with bots or scripting tools (e.g., 'bot', 'curl', 'python', 'powershell') and successful HTTP status codes (200). The 'short' session duration is inferred from small response sizes (less than 5000 bytes), suggesting automated access rather than human interaction.
This rule detects DNS queries to known malicious domains associated with various APT groups and ransomware families. The domains are hardcoded indicators of compromise (IOCs) and their resolution suggests potential compromise or communication with adversary infrastructure.
This rule detects suspicious network connections originating from specific processes (DbgView64.exe or VirtualBox.exe) to Microsoft Teams TURN relay servers, where the RemoteUrl does not start with "teams.microsoft.com". This indicates potential protocol tunneling or an attempt to exfiltrate data or establish command and control through an unexpected channel, possibly leveraging Microsoft Teams infrastructure in an unauthorized manner. The use of DbgView64.exe or VirtualBox.exe as initiating processes for such connections is highly unusual and indicative of malicious activity.
Detects PHP or web server processes launching command-line database clients. INFINITERED collected database credentials and supported arbitrary SQL execution against compromised REDCap environments. Direct database-client execution by a web-serving process is uncommon and may indicate credential access, data collection, or backdoor command execution.
Detects attempts to overwrite web server content files for defacement
Detects the creation of hidden configuration files (e.g., .sv_config.json) in hidden directories, indicating the installation or configuration phase of the SPECTRALVIPER backdoor. The rule specifically looks for files created in a directory matching the pattern `/.config/spectralviper/` or files named `.sv_config.json`.
This rule detects suspicious network connections originating from specific processes (DbgView64.exe or VirtualBox.exe) to Microsoft Teams TURN relay servers, where the RemoteUrl does not start with "teams.microsoft.com". This indicates potential protocol tunneling or an attempt to exfiltrate data or establish command and control through an unexpected channel, possibly leveraging Microsoft Teams infrastructure in an unauthorized manner. The use of DbgView64.exe or VirtualBox.exe as initiating processes for such connections is highly unusual and indicative of malicious activity.
This rule detects DNS queries to known malicious domains associated with various APT groups and ransomware families. The domains are hardcoded indicators of compromise (IOCs) and their resolution suggests potential compromise or communication with adversary infrastructure.
Detects network connections to known or suspected Command and Control (C2) IP addresses and ports associated with ransomware activity. This rule specifically looks for outbound connections from devices to a predefined list of suspicious remote IP addresses on common C2 ports (443, 8443, 6379, 27017).
Detects web shell files written to web server directories
Detects web shell files written to web server directories
This rule detects an unusually high number of downloads of files identified as 'octet-stream' or 'executable' from a single IP address within a one-hour window, based on W3CIISLog data. This behavior could indicate various malicious activities, including the distribution of malware, data exfiltration, or the use of a compromised web server for command and control.
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