Thanks for your reply, but I get the following error message when executing /opt/eset/efs/sbin/cls/cls:
ECLS Command-line scanner, version 1.0.0.0, (C) 2017 ESET, spol. s r. o.
Scanner initialization failed.
And as I stated above, strace reveals that the scanner was looking for a file called em000_64.dat, but fails.
Best regards, Sascha