Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the creation of web shells (.aspx, .ashx) in the SmarterMail web root directory by the mail service process. This is a common persistence mechanism used by attackers after exploiting vulnerabilities like CVE-2026-24423 to maintain remote access.
Detects CI/CD runners utilizing inline base64 decoding to execute malware payloads, specifically looking for processes that use 'base64 -d' in their command line and also initiate network connections to a known malicious IP address (216.126.225.129) while using 'curl' or 'wget'.
Identifies HTTP POST requests indicative of rogue administrator account creation patterns ('dev_xxxxxx' or 'developer_api1') used in the OptinMonster, TrustPulse, and PushEngage supply chain attack. This rule specifically looks for POST requests to WordPress user creation endpoints containing attacker-controlled account names in the URI query.
This rule monitors file system events for the creation of files with common web shell names (e.g., shell.php, cmd.php) within known web server directory paths (e.g., wwwroot, inetpub). The detection of these specific file names in directories typically used for serving web content is a strong indicator of a potential web shell deployment.
Detects unauthenticated SQL injection attempts targeting the Ghost CMS Content API by looking for suspicious slug filter ordering syntax (`slug:[` or its URL-encoded equivalent) in the query string. This rule specifically targets a known vulnerability, CVE-2026-26980.
Detects the deletion of .pkg_history or .pkg_logs, an anti-forensic attempt after the dropper completes, associated with the Mastra NPM compromise.
Detects the gh-token-monitor script using grep to extract GitHub Classic or Fine-Grained tokens (matching the ghp_ or gho_ structure) from the filesystem. This rule specifically looks for process command lines containing 'grep' and the regex pattern 'gh[po]_[a-zA-Z0-9]{36}', which is indicative of searching for GitHub tokens.
Detects external HTTP POST requests to vulnerable Oracle PeopleSoft Environment Management Hub (PSEMHUB) and Integration Broker endpoints. This behavior is associated with UNC6240 (ShinyHunters) zero-day exploitation of CVE-2026-35273.
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.
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