Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects attempts to access the Windows Credential Manager Vault remotely over TCP port 445 (SMB). It specifically looks for the string "vaultcmd" in the network traffic, which is a command-line utility used to manage credentials in the Credential Manager. This activity could indicate an attacker attempting to extract stored credentials from a compromised system.
This rule detects attempts to exfiltrate browser password databases over HTTP. It specifically looks for HTTP POST requests containing the string "Login Data" in the client body, which is a common indicator of browser credential theft.
This rule detects the delivery of a macOS Keychain Access tool via HTTP. It specifically looks for the string "SecKeychainFindInternetPassword" within the file data of HTTP traffic flowing from the server to the client. This string is indicative of an application attempting to access or manipulate macOS Keychain passwords, suggesting the presence of malware or a malicious utility designed to extract credentials.
This rule detects the exfiltration of a password store database over HTTP POST. It specifically looks for HTTP POST requests where the URI or content contains the string "passwords" (case-insensitive) and the data size is greater than 1000 bytes. This combination suggests a large file, potentially a database, containing passwords being sent out of the network.
This rule detects potential abuse of a Certificate Enrollment Web Service (typically Microsoft's CertEnroll) for forgery attempts. It specifically looks for HTTP requests to the '/certenroll/' URI on port 80 (HTTP) within the home network. A threshold of 10 such requests from a single source IP within 60 seconds is set to trigger the alert, indicating a possible automated or rapid attempt to interact with the certificate enrollment service.
This rule detects network traffic to a specific URI path associated with Active Directory Certificate Services (AD CS) enrollment. The URI '/ADPolicyProvider_CEP_UsernamePassword/service.svc/CEP' is known to be used in Certificate Enrollment Policy (CEP) web services, which can be abused in ESC1 (ESC1 Certificate Template Privilege Escalation) attacks to obtain certificates with elevated privileges. The rule specifically looks for TCP traffic on port 443 (HTTPS) to this URI, indicating an attempt to interact with the CEP service.
This rule detects automated multi-factor authentication (MFA) push bombing attempts targeting Duo Security's API. It specifically looks for HTTP POST requests to 'api.duosecurity.com' and triggers an alert if 10 such requests are observed from the same source IP within a 30-second window. This behavior is indicative of an attacker repeatedly sending MFA push notifications to a user's device in an attempt to overwhelm them or trick them into approving a fraudulent login.
This rule detects a potential MFA fatigue attack by monitoring repeated HTTP requests to known MFA provider domains (duo.com, okta.com, microsoft.com) containing the string "auth" in the URI. A threshold of 20 requests within 60 seconds from the same destination IP address triggers the alert, indicating an attacker might be repeatedly sending push notifications to a user's device to overwhelm them into accepting an authentication request.
This rule detects the exfiltration of Kerberos credential cache (ccache) files over SSH SCP. It specifically looks for the string "KRB5CCNAME" within TCP traffic on port 22 (SSH), indicating the potential transfer of a ccache file, which often contains this environment variable name.
This rule detects when a Kerberos credential cache (ccache) file is copied over SMB. Attackers may attempt to steal Kerberos ccache files to obtain Kerberos tickets, which can then be used for various credential access attacks like 'Pass the Ticket'. The rule specifically looks for the string '.ccache' within SMB traffic on port 445, indicating the transfer of such a file.
This rule detects an AS-REP Roasting attack where pre-authentication is not required. It specifically looks for UDP traffic on port 88 (Kerberos) containing specific byte sequences associated with this attack technique. The rule uses a threshold to prevent excessive alerts from a single source.
This rule detects network traffic indicative of an 'Evil Twin' access point credential capture portal. It specifically looks for HTTP POST requests where the URI contains both 'wifi' and 'password' (case-insensitive). This pattern suggests a malicious portal designed to trick users into entering their Wi-Fi credentials.
This rule detects network traffic indicative of AnyDesk remote desktop software being used as a command and control (C2) channel. It specifically looks for HTTP requests to 'anydesk.com' or 'relay.anydesk.com' domains. A threshold of 5 connections within 60 seconds from the same source IP is set to reduce false positives.
This rule detects potential command and control (C2) channel activity by identifying HTTP requests where the URI contains specific keywords commonly associated with C2 infrastructure switching or staging. The keywords include 'stage2', 's2', 'next', 'pivot', and 'relay'. This indicates an attacker might be moving to a new phase of their operation or redirecting C2 communications.
This rule detects potential bidirectional command and control (C2) activity leveraging Discord webhooks. It specifically looks for HTTP POST requests to 'discord.com' with the URI containing '/api/webhooks/'. A threshold of 5 such requests within 60 seconds from the same source IP is set to reduce false positives and indicate sustained communication, characteristic of C2.
This rule detects DNS queries for 'pastebin.com' that occur at a high frequency (5 times within 60 seconds from the same source IP). This pattern is indicative of a Dead Drop Resolver Command and Control (C2) mechanism, where attackers use services like Pastebin to host C2 instructions or data, and malware frequently queries these services to retrieve commands or exfiltrate data. The rule specifically targets DNS traffic on port 53.
This rule detects access to websites or services that are commonly associated with botnet rental, stresser, or DDoS-for-hire services. It specifically looks for HTTP requests where the host header contains keywords like 'booter', 'stresser', or 'ddoser' (case-insensitive). This indicates a potential policy violation where an internal user might be attempting to utilize or research such services.
This rule detects HTTP requests where the 'Host' header matches patterns commonly associated with serverless function domains, specifically AWS Lambda URLs, Azure Websites, and Google Cloud Functions. The rule is designed to identify potential command and control (C2) infrastructure utilizing serverless platforms. It triggers an alert if 10 such requests are observed from a single source IP within a 60-second window.
This rule detects HTTP traffic where the 'Host' header contains 'workers.dev'. This domain is associated with Cloudflare Workers, which can be used by attackers to deploy attack infrastructure such as command and control (C2) servers, phishing pages, or data exfiltration points. The rule is configured to trigger a threshold alert if 10 such connections are observed from a single source IP within 60 seconds, indicating potential automated activity or repeated attempts to access or deploy malicious worker scripts.
This rule detects network traffic indicative of a compromised host attempting to beacon to a botnet command and control server. Specifically, it looks for HTTP requests where the URI path contains "/gate.php". This pattern is commonly associated with botnet communication.
This rule detects Telnet access attempts to network devices within the home network. It specifically looks for TCP traffic destined for port 23 (the standard Telnet port) and triggers an alert if three such connections from the same source IP are observed within a 60-second window. This activity is flagged as a 'possible compromise' due to Telnet's insecure nature and its common use in initial access or resource development by adversaries.
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