Arnold Chan
@slazTrusted contributorCompletionist
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This rule correlates email sender activity with network, cloud, and identity logs by matching traffic against a specific IP range (160.79.104.0/21) identified as malicious or suspicious. The rule flags instances where this range appears as an email sender IP or as a remote/source IP address across various infrastructure indices, potentially indicating adversary communication or exfiltration.
This rule monitors various logs (email, entra, device, graph, cloud) for IP addresses (source or remote) that match a specific CIDR range (160.79.104.0/21). This is typically used to identify traffic originating from or communicating with infrastructure identified as malicious or suspicious by threat intelligence.
This rule monitors various logs (email, entra, device, graph, cloud) for IP addresses (source or remote) that match a specific CIDR range (160.79.104.0/21). This is typically used to identify traffic originating from or communicating with infrastructure identified as malicious or suspicious by threat intelligence.
This rule monitors various logs (email, entra, device, graph, cloud) for IP addresses (source or remote) that match a specific CIDR range (160.79.104.0/21). This is typically used to identify traffic originating from or communicating with infrastructure identified as malicious or suspicious by threat intelligence.
Detects Server-Side Request Forgery (SSRF) attempts targeting an MLflow server where an attacker-controlled HTTP redirect response forces the server to reach out to the cloud instance metadata service at 169.254.169.254. This rule specifically looks for HTTP 30x redirect status codes where the Location header contains the sensitive metadata service IP address.
Detects Server-Side Request Forgery (SSRF) attempts targeting an MLflow server where an attacker-controlled HTTP redirect response forces the server to reach out to the cloud instance metadata service at 169.254.169.254. This rule specifically looks for HTTP 30x redirect status codes where the Location header contains the sensitive metadata service IP address.
Detects outbound network traffic associated with the Tailscale VPN protocol, specifically identifying potential unauthorized or personal tailnet communication channels. The detection monitors for TLS SNI strings ending in '.ts.net' and WireGuard handshakes on UDP port 41641. These indicators are common to all Tailscale client activity and require environment-specific exclusions of sanctioned Tailscale infrastructure to minimize noise.
Detects potential exfiltration activity by identifying HTTP POST/PUT requests to known suspicious domains, including specific operator-controlled hosts and anonymous file sharing services, as well as the use of HTTP Range headers for bulk API data exfiltration.
Detects indicators of cross-site scripting (XSS) attacks aimed at stealing web session cookies. The rule covers the injection of malicious scripts into client responses, anomalous CORS preflight responses that could facilitate data exfiltration, and subsequent HTTP callbacks or beaconing containing cookie data to external endpoints.
Detects Server-Side Request Forgery (SSRF) attempts against Grafana instances using the 'X-Grafana-URL' header. The rule identifies requests attempting to access internal network ranges, link-local addresses, or cloud metadata endpoints (e.g., 169.254.169.254, localhost) via the Grafana MCP interface, particularly when non-GET HTTP methods are used to potentially mutate internal resources.
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