Implants frequently timeout when executing .NET binaries via execute-assembly

[thesevenrings]

Describe the bug
Sliver implants are just not working on my end when I use functionality such as execute-assembly to execute .NET binaries. For example, consider the following command:

execute-assembly /home/kali/Documents/Sliver/SharpCollection/NetFramework_4.5_x64/SharpView.exe "get-netuser -PreauthNotRequired" -t 240 -i -E -M

This results in the session displaying "Executing Assembly" and hanging. Waiting a bit for the assembly to actually execute results in the following error:

[!] rpc error: code = Unknown desc = implant timeout

Here is the contents of my log file:

INFO[2024-11-24T08:01:08-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:220] finished unary call with code OK 
INFO[2024-11-24T08:01:16-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:220] finished unary call with code OK 
INFO[2024-11-24T08:01:19-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:220] finished unary call with code OK 
INFO[2024-11-24T08:01:24-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:220] finished unary call with code OK 
INFO[2024-11-24T08:01:25-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:220] finished unary call with code OK 
ERRO[2024-11-24T08:03:25-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:224] finished unary call with code Unknown 
ERRO[2024-11-24T08:10:04-05:00] [github.com/grpc-ecosystem/[email protected]/logging/logrus/options.go:224] finished unary call with code Unknown 

Note that uploading the SharpView vbinary with Upload, and dropping into a shell to run the exact same command is successful.

Sliver version:

[server] sliver (WIDESPREAD_BREAKFAST) > version

[*] Client v1.5.42 - 85b0e870d05ec47184958dbcb871ddee2eb9e3df - linux/amd64
    Compiled at 2024-02-28 14:46:53 -0500 EST
    Compiled with go version go1.20.7 linux/amd64
[*] Server v1.5.42 - 85b0e870d05ec47184958dbcb871ddee2eb9e3df - linux/amd64
    Compiled at 2024-02-28 14:46:53 -0500 EST

OS Version:

Linux kali 6.11.2-amd64 #1 SMP PREEMPT_DYNAMIC Kali 6.11.2-1kali1 (2024-10-15) x86_64 GNU/Linux