Darshan Thummar
@MightyCompletionist
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This rule detects network traffic to port 88 (Kerberos) that exhibits characteristics of a vulnerability exploit for credential access. Specifically, it triggers an alert if there are 30 or more TCP connections to port 88 on the HOME_NET within a 5-second window from a single source IP address, indicating a potential brute-force or rapid credential access attempt against a Kerberos service.
This rule detects attempts to dump memory from the 'securityd' process on macOS systems, specifically looking for the string 'securityd' and 'ptrace' in TCP traffic on port 22. This activity is indicative of credential access attempts, as 'securityd' handles sensitive security information.
This rule detects attempts to dump the macOS Keychain via a remote SSH connection. It specifically looks for the string "security dump-keychain" within TCP traffic on port 22 (SSH). This command is used to extract credentials and other sensitive information stored in the macOS Keychain.
This rule detects HTTP requests to the Docker API endpoint '/containers/*/json' which could indicate an attempt to query container environment secrets. The rule specifically looks for requests to the '/containers/' path followed by '/json' in the HTTP URI.
This rule detects a specific HTTP POST request pattern associated with the Mirai botnet's check-in mechanism. It looks for HTTP POST requests to the '/report' URI with a body size between 21 and 99 bytes. A threshold of 10 such requests from the same source within 60 seconds triggers the alert, indicating potential botnet activity.
This rule detects potential automated social media account creation attempts by monitoring HTTP traffic for requests to common social media platforms (twitter.com, x.com, facebook.com) that include 'signup' in the URI. A threshold of 5 such requests within 60 seconds from the same source IP triggers the alert, indicating a possible automated or high-volume registration process.
This rule detects multiple login attempts to social media platforms (Twitter, X, Instagram, Facebook) from a single source IP address within a short timeframe. It specifically looks for HTTP POST requests to URIs containing 'login' on these domains. A threshold of 10 attempts within 30 seconds triggers the alert, indicating a potential brute-force or credential stuffing attack aimed at hijacking social media accounts.
This rule detects the download of potential proof-of-concept (PoC) exploit code for CVEs. It specifically looks for HTTP responses containing a URI that matches the pattern 'CVE-YYYY-NNNN' (e.g., CVE-2023-1234) and also contains the word 'exploit' in the file data. This combination suggests that a client on the internal network is downloading code related to a known vulnerability, which could be for research, testing, or malicious purposes.
This rule detects HTTP PUT requests to known remote file hosting services (transfer.sh, file.io, gofile.io, anonfiles). This activity is indicative of payload staging, where an attacker uploads malicious files or tools to a remote server for later use in an attack, often as part of the resource development phase of the attack lifecycle.
This rule detects potential vendor relationship page scraping activity. It triggers an alert when a client makes 20 or more HTTP requests containing the word "vendor" (case-insensitive) in the URI within a 30-second window. This behavior could indicate an attacker or automated script attempting to gather information about an organization's vendors, which is a reconnaissance technique.
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