Darshan Thummar
@MightyCompletionist
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This rule detects multiple attempts to pull container image manifests from public Docker registries (registry.hub.docker.com or ghcr.io). A threshold of 10 pulls within 60 seconds from the same source IP is set to identify potentially malicious or excessive activity, possibly indicating an attempt to enumerate or download numerous container images.
This rule detects attempts to establish a TCP connection to port 902 on the home network, which is commonly used for VMware ESXi management. The rule specifically looks for SYN packets (flags:S) and triggers if there are at least 3 such connection attempts from the same source within a 60-second window. This could indicate an attempt to access or scan the ESXi management interface.
This rule detects attempts to deploy a container with host network mode enabled. It specifically looks for HTTP requests to the '/containers/create' endpoint, which is commonly used by container orchestration systems like Docker, and checks for the presence of 'host' within the HTTP client body, indicating the host network mode configuration. This can be a security concern as it allows the container to have direct access to the host's network interfaces, potentially bypassing network segmentation and security controls.
This rule detects attempts to execute commands within a Kubernetes pod using `kubectl exec`. It specifically looks for HTTP requests to port 8080 (often used by Kubernetes API servers or proxies) with URIs containing both '/exec' and 'pods', indicating an interactive command execution session within a pod.
This rule detects executable attachments (e.g., .exe, .bat, .cmd, .scr, .pif, .com) being delivered via SMTP email. It specifically looks for these file extensions within the 'filename' attribute of email attachments.
This rule detects the string "xdotool" within an SSH session (port 22) traffic flowing from the client to the server. xdotool is a command-line tool that simulates keyboard input and mouse activity, often used for automated input injection. Detection of this string suggests an attempt to automate actions within an SSH session, which could be indicative of malicious activity such as automated command execution or data exfiltration.
This rule detects potential mass email collection activity over IMAP (port 143). It triggers an alert if a client makes 20 or more 'FETCH BODY[]' requests within a 60-second window to an IMAP server. This behavior is indicative of an attacker or malicious script attempting to download a large number of email bodies, potentially for data exfiltration or analysis.
This rule detects an attempt at RDP lateral movement by identifying multiple RDP connection attempts to a host within a short timeframe. It specifically looks for the RDP connection initiation sequence (hexadecimal content '|03 00 00|') on port 3389 (RDP default port) and triggers an alert if 5 such attempts are observed from the same source within 60 seconds. This behavior is indicative of an attacker trying to move laterally within a network using RDP.
This rule detects an ICMP ping sweep for host discovery, a technique used by attackers to identify active hosts on a network. It triggers when more than 20 ICMP echo requests (type 8) are sent from a single source within a 10-second window to the home network.
This rule detects an HTTP flood application-layer Distributed Denial of Service (DDoS) attack. It triggers when a single source IP address sends 200 or more HTTP GET requests to a server within a 10-second window. This behavior is indicative of an attempt to overwhelm the application or server with a high volume of legitimate-looking HTTP requests.
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