: The precise date the archive was created or the data was harvested.
: A compressed archive format commonly used to package exfiltrated information—such as browser cookies, saved passwords, and system metadata—for easier upload to a Command and Control (C2) server. Technical Significance IL_I-K-L-07.September.2022.rar
Files with this specific naming convention are frequently indexed by security researchers or found on underground forums. They are "solid reports" in the sense that they contain a complete set of exfiltrated data from a single infection incident or a specific batch of targets. : The precise date the archive was created