Or
1. Add remote PC to home network of office (hidden super admin)
Or
2. Have a suitable software which distributing via USB (flash-card)
Or
3. Good crypted file from hvnc panel, with WISELY and TESTED scope of commands with one single target: lifetime persistence (device always in panel hvnc)
Get access to email clients: you should know exactly which emails targeted user operating via his mobile device. Depending on device - send special email which will have needed kind of payload (a lot of variations, in your case probably will be better combination: direct url for download some file, and for example opened excel file (attached to letter) with some shell code, and this shell code initiate launching of main file).
In fact need to make all in the way - your friend should not be under any of issues
1. Add remote PC to home network of office (hidden super admin)
Or
2. Have a suitable software which distributing via USB (flash-card)
Or
3. Good crypted file from hvnc panel, with WISELY and TESTED scope of commands with one single target: lifetime persistence (device always in panel hvnc)
Get access to email clients: you should know exactly which emails targeted user operating via his mobile device. Depending on device - send special email which will have needed kind of payload (a lot of variations, in your case probably will be better combination: direct url for download some file, and for example opened excel file (attached to letter) with some shell code, and this shell code initiate launching of main file).
In fact need to make all in the way - your friend should not be under any of issues