[opensuse] How to look for rootkits, spyware, virus, ....

Recently my desktop internet connection was closed by the department systems administrator because of suspicious frequent network accesses. Since I have been running SuSE for many years and never had virus problems I was quite surprised.
Anyway, in addition to the regular checks and tests they perform in these cases, I was asked whether there exists a system tool to verify the integrity of the system configuration. Basically they want to double check that all what is currently installed on my system, excluding my own applications, are regular SuSE updated packages rather than some malicious program, rootkit, and so on ...
Thank you in advance for your help.
Maura




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