CaRT container file format for neutered malware

[XVilka]

The CaRT file format is used to store/transfer malware and its associated metadata. It neuters the malware so it cannot be executed and encrypts it so anti-virus software cannot flag the CaRT file as malware.

See these implementations:

• https://docs.rs/cart_container/latest/cart/
• https://github.com/CybercentreCanada/cart
• https://bitbucket.org/cse-assemblyline/cart/
• https://github.com/NationalSecurityAgency/ghidra/tree/master/Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/cart
• https://github.com/NationalSecurityAgency/ghidra/tree/master/Ghidra/Features/FileFormats/src/test/java/ghidra/file/formats/cart