Calculating the Shannon entropy of the file can distinguish between compressed data and encrypted payloads. A high entropy score (near 8.0) often serves as a primary feature for flagging this archive as a carrier for malicious code [3].
The .7z format suggests high compression and potential encryption. Analyzing the archive's header (starting with 37 7A BC AF 27 1C ) can reveal if the file was tampered with or if specific flags (like encrypted headers) are present [2, 3]. hencock.7z
Analyzing the strings often reveals specific compiler information or hardcoded paths (e.g., C:\Users...) that serve as a "fingerprint" for the developer's environment [1]. Key Technical Attributes Feature Type Description Magic Bytes 7z ¼ ½ ' (Standard 7-Zip signature) Potential Payloads Often contains a .dll or .exe used for process hollowing. Compression Ratio Calculating the Shannon entropy of the file can
A "deep feature" in this context typically refers to an extracted characteristic from the archive's contents—such as a specific file header, an unusual metadata field, or a behavior-linked string—that can be used for identification or classification. Analyzing the archive's header (starting with 37 7A