I am finding a similar detection of the same malware/virus on two different MacBook Air M1 Apple silicon computers, one running Monterey 12.6 and one running Monterey 12.6.1, except that for me it is in SIP protected file that online forums say is necessary for the macOS:
dyld_shared_cache_arm64e
in this directory:
/System/Library/dyld/
The full path is: /System/Library/dyld/dyld_shared_cache_arm64e
The file dyld_shared_cache_arm64e has a different creation date on 12.6.1 than 12.6 after a system update.
That file is 1.5GB and too large to upload to online scanners but I used Terminal to split the file into maximum 600MB segments, and scanned each segment on VirusTotal and no threats detected. I then split the file into 637MB segments (in case a virus was just at the "edge" of the split) - same, no detection. So my assumption is this is a false positive. I am using free Mac Avast Security so no way to report this to Avast except posting here.