I find a kepler assembler in alicloud(aliyun)'s website:
https://hpc.aliyun.com/tools/assembler?spm=0.0.0.0.7CKjKC
If the link above direct you to a Chinese page, you should create your alicloud account first at this English page first and login.
I’ve tried it. It could dump assembly code from a cubin file, and generate a cubin file from assembly code.
There is a document here:
https://hpc.aliyun.com/doc/keplerAssemblerUserGuide?spm=0.0.0.0.k7Oiwj