Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects potential command and control (C2) beaconing activity using DNS tunneling. It monitors for a high frequency of DNS TXT record queries to long subdomains (exceeding 50 characters), which is a common characteristic of tools like DNScat and iodine that encode data within DNS requests.
This rule detects HTTP requests attempting to perform Local File Inclusion (LFI) or path traversal attacks by searching for patterns such as '/../' sequences and common sensitive file paths like /etc/passwd, /etc/shadow, or /proc/self/environ in the URI.
Detects large HTTP POST requests (over 5MB) directed at external hosts that utilize multipart or chunked encoding, which are commonly used to obfuscate or stream large volumes of data during an exfiltration event.
Detects outbound HTTP POST requests to suspicious URIs and subsequent inbound responses containing executable binary (PE) signatures, characteristic of Emotet malware command-and-control (C2) activity.
This rule detects the outbound transmission of email attachments via SMTP (ports 25 and 587) that contain archived file formats (zip, 7z, tar.gz, tgz). Attackers often compress collected data into archives to facilitate exfiltration and minimize the time required for data transfer.
This rule monitors for HTTP POST requests to external networks containing 'gtag=' in the URI, which is a known technique used by the TrickBot malware to exfiltrate its group identifier during C2 communication.
Detects high-frequency HTTP 401 Unauthorized responses associated with Basic Authentication attempts within a short timeframe, indicating a potential credential brute-force attack.
This rule monitors for FTP 'STOR' commands followed by large data transfers (exceeding 64KB) initiated from internal hosts to external destinations. This pattern is often indicative of data exfiltration using the File Transfer Protocol (FTP).
This rule detects potentially malicious activity leveraging the Windows Remote Management (WinRM) protocol over HTTP (ports 5985/5986). It specifically monitors for POST requests to the '/wsman' URI that contain the string 'powershell' in the request body, which is indicative of remote command execution via WinRM using PowerShell.
Detects multiple TCP synchronization (SYN) packets targeting the SSH service (port 22) from a single source IP address within a short timeframe. This behavior is indicative of a brute-force or credential-guessing attack against the SSH service.
Detects common SQL injection patterns within the HTTP URI query string. The rule monitors established network traffic to web servers and uses regex matching to identify attempts to use SQL keywords like UNION SELECT, OR 1=1 boolean-based attacks, blind SQL injection techniques (sleep/benchmark), and attempts to access information_schema metadata tables.
Detects repeated inbound TCP connection attempts to port 3389 (RDP) from a single source address within a short timeframe. This behavior is indicative of an RDP brute-force or password spraying attack targeting remote desktop services.
Detects HTTP POST requests characteristic of Emotet Epoch 4 and 5 C2 communication. The rule monitors for specific URI patterns, the presence of a 'Cookie' header, and a base64-encoded request body exceeding 80 characters, which are indicative of Emotet malware beaconing activity.
Detects outbound HTTP POST requests where the Content-Length header indicates a data transfer of 5MB or greater. This pattern is indicative of potential unauthorized data exfiltration over the web protocol.
This rule monitors incoming TCP traffic on port 22 (SSH) and alerts when a single source IP address exhibits an excessive number of authentication attempts within a 60-second window, which is indicative of a brute-force attack against the SSH service.
Detects HTTP traffic containing a specific session cookie pattern characteristic of PowerShell Empire C2 agent communication, utilizing regex to identify base64-encoded session identifiers.
This rule detects rapid, successive TCP connection attempts directed to port 3389 (RDP) from a single external source IP within a short timeframe. This behavior is indicative of a brute force attack or automated credential guessing activity targeting remote desktop services.
Detects classic SQL injection attack patterns within incoming HTTP requests, such as UNION SELECT statements, boolean-based tautologies (1=1), table dropping commands, or common URL-encoded quote characters.
Detects multiple FTP login failures ('530 Login incorrect') from a single source IP address within a short time window, indicating a potential brute force or password guessing attempt against an FTP service.
This rule detects HTTP POST requests containing a Content-Length header value indicating a body size exceeding 10MB. Large POST requests may indicate data exfiltration, large file uploads, or misuse of HTTP channels for data transfer to external destinations.
This rule detects network traffic indicative of the NjRAT (Bladabindi) remote access trojan, specifically identifying its pipe-delimited command-and-control protocol patterns (e.g., '|ll|' or '|kl|').
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