The provided log file contains multiple HTTP GET requests attempting to access various directories and files on the web server such as:
* /balance
* /security
* /finance
* /secret
* /opt
* /fuzzer/admin
These requests appear to be sequential, systematically targeting commonly used file and directory paths. The response codes are mostly 404 (Not Found) and a few 301s, indicating that the requester is trying different permutations of paths to discover hidden or vulnerable endpoints. This behavior is consistent withdirectory fuzzing, a reconnaissance technique used by attackers (or automated tools) to map out web directory structures by sending a high volume of crafted requests to guess hidden or unlinked directories and files.
This is distinct from DDoS (which would manifest as volume-based access issues), SQL injection (which targets specific parameters within requests), or botnet infection (which generally involves command-and- control communication or massive traffic floods).
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on Web Attacks and Threat Identification - Directory Fuzzing Patterns.