V2021.7z 🏆

: Using the command line tool: 7z x v2021.7z -p[PASSWORD] .

: Version 21.05 added support for SHA-1 and SHA-256 instructions found in modern AMD Ryzen and Intel CPUs, speeding up hash calculations and AES decryption. v2021.7z

: Often found in hidden system files like ConsoleHost_history.txt or via Known-Plaintext Attacks . : Using the command line tool: 7z x v2021

: Improved compression speed for large archives by increasing the default number of LZMA2 chunks per solid block. CTF & Forensic Context : Improved compression speed for large archives by

: A major milestone in mid-2021 was the official release of 7-Zip for Linux and macOS, replacing the older, third-party p7zip port which had become obsolete.

In the context of competitions (many of which occurred in 2021, such as the Belkasoft CTF or TISC 2021 ), a .7z file is frequently used as a password-protected container for forensic artifacts. Standard Recovery Procedure:

: The encryption strength for 7z archives was increased by expanding the random initialization vector (IV) from 64-bit to 128-bit.