Linux arm64 implant (and probably openaev agent) don't work

[impolitepanda]

Description

To downaload the implant on a linux system (for the agent as well, I believe, but needs checking), the download script uses uname -m to check for which architecture it needs to download the executable program.

In openaev, we only support two values for architectures, on all platforms : x86_64 and arm64.
Unfortunately, uname -m on an arm64 based linux will not return arm64, but mainly aarch64, and a list of other possibilities.

Therefore, we get an Unsupported architecture error on these systems

Environment

1. OS (where OpenAEV server runs): Implant on arm64 based linux systems
2. OpenAEV version: all versions
3. OpenAEV client: implant
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Find a suitable arm64 linux machine
2. Install any supported EDR on it
3. Try to execute a payload

Expected Output

implant should run

Actual Output

Implant gives an Unsupported architecture error

[antoinemzs]

Customer hit it.

We probably just need to support aliases for archs as a first intention stop-gap.