Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects a POST request to the MyBB administrative interface (specifically the user-users module) that contains parameters indicating an attempt to escalate a limited administrative user to a full administrator by assigning the 'usergroup=4' or 'gid=4' identifier, which corresponds to the default Administrator group in MyBB.
This rule detects network connections from internal hosts to identified C2 or phishing infrastructure associated with the threat actor group UNC1151 (also known as Ghostwriter). It monitors both host-based network events (via DeviceNetworkEvents) and centralized network security logs (via CommonSecurityLog) for traffic targeting a curated list of known malicious IP addresses.
This rule detects network connections from internal hosts to identified C2 or phishing infrastructure associated with the threat actor group UNC1151 (also known as Ghostwriter). It monitors both host-based network events (via DeviceNetworkEvents) and centralized network security logs (via CommonSecurityLog) for traffic targeting a curated list of known malicious IP addresses.
Detects the unauthorized injection of the 'GEMINI_TRUST_WORKSPACE=true' environment variable via process command lines or shell environments. This rule identifies potential exploitation attempts related to CVE-2026-12537 by flagging instances where this variable is set outside of defined, trusted CI/CD runner environments.
Detects the unauthorized injection of the 'GEMINI_TRUST_WORKSPACE=true' environment variable via process command lines or shell environments. This rule identifies potential exploitation attempts related to CVE-2026-12537 by flagging instances where this variable is set outside of defined, trusted CI/CD runner environments.
Detects requests to the PeopleSoft listening connector containing loopback, link-local, or private network targets in the URL or captured request fields. This indicates a potential Server-Side Request Forgery (SSRF) attempt.
Detects files or directories created beneath the PSEMHUB environment metadata transactions staging path, which could indicate data staging or server compromise. This rule specifically looks for file creation, modification, or renaming events within paths containing 'PSEMHUB.war' and '/envmetadata/transactions/' or '\envmetadata\transactions\'.
This rule identifies potential account compromise by detecting successful logins to at least two different SaaS applications monitored by Microsoft Cloud App Security (MCAS) within a 2-hour window, originating from geolocations separated by more than 500 kilometers. This behavior is indicative of credential sharing or account hijacking where an adversary accesses multiple cloud services rapidly from geographically distant locations.
Detects the execution of PowerShell with encoded commands originating from suspicious process paths (outside Windows or Program Files directories). The rule includes logic to identify potential sandbox evasion by correlating the PowerShell activity with subsequent tasklist.exe execution within a short window, often characteristic of malware performing environment checks.
This rule detects the execution and network activity of known Remote Monitoring and Management (RMM) tools such as AnyDesk, TeamViewer, and ScreenConnect. It assigns a risk score based on whether the activity occurs outside of defined business hours (8 AM - 6 PM) and whether the tool is initiating an outbound connection on port 443, a common pattern for C2 communication.
This rule detects suspicious WebSocket upgrade attempts targeted at Microsoft authentication endpoints, typically used by 'Bluekit' or similar Phishing-as-a-Service (PhaaS) platforms to establish a persistent connection or tunnel for credential harvesting via adversary-in-the-middle attacks. It flags traffic from non-private IP addresses that exhibit specific patterns associated with proxy usage or automated tooling (e.g., Python/curl) combined with WebSocket upgrade headers.
This rule detects suspicious WebSocket upgrade attempts targeted at Microsoft authentication endpoints, typically used by 'Bluekit' or similar Phishing-as-a-Service (PhaaS) platforms to establish a persistent connection or tunnel for credential harvesting via adversary-in-the-middle attacks. It flags traffic from non-private IP addresses that exhibit specific patterns associated with proxy usage or automated tooling (e.g., Python/curl) combined with WebSocket upgrade headers.
Detects potential Pass-the-Hash lateral movement where a single account uses NTLM authentication as a local administrator to access three or more distinct devices within a 30-minute window, a pattern often indicative of automated credential propagation.
Correlates an MSI downloaded by a browser with silent msiexec execution on the same device within fifteen minutes. This rule detects potential malicious software installation initiated by a user downloading an MSI package via a web browser, followed by a silent execution of that package using msiexec.exe. This technique is often used by attackers to install malware without user interaction.
Detects a high number of office, PDF, text, and archive files created or renamed in the Downloads or AppData Roaming folders by a single process within a fifteen-minute window. The detection is triggered if either 25 or more files are created/renamed, or if the total size of these files exceeds 500 MB.
Detects usage of the Windows certutil.exe binary to perform potentially malicious operations such as downloading files via URL cache or decoding base64/hex payloads. The rule specifically alerts when these actions occur within common user-writable or temporary directories often used by threat actors for file staging.
Detects a shell script containing 'fanout' in its name, created or modified in common temporary directories like /tmp or /var/tmp, matching a reported propagation workflow. This activity is indicative of lateral movement attempts.
Detects remote management software launched from an existing RDP session, indicating nested remote access or pivoting.
Detects WinSCP command-line use that performs scripted uploads, synchronisation, or non-interactive transfer, which could indicate data exfiltration or automated file transfers.
Detects outbound TCP port 445 traffic (SMB) from a host identified as PeopleSoft, WebLogic, or PIA to a public IP address. This could indicate data exfiltration or forced authentication attempts.
Detects a command shell using cURL to download an MSI package and immediately install it silently with msiexec, matching a reported RMM delivery workflow. This rule specifically looks for command-line executions involving 'cmd.exe', 'powershell.exe', or 'pwsh.exe' that use 'curl' to download a '.msi' file and then execute 'msiexec' with silent installation flags.
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