Excerpt: ″The Vienna virus is an example of a direct-action virus that appeared in the 1980s. It targeted executable files, and when a corrupted file was executed, the virus took direct action by infiltrating other executable files in the same directory. The Vienna virus did not attempt to hide its presence and immediately manifested its effects upon execution.″
Source: binaryit.com.au
Source: binaryit.com.au
Note that Google's AI search result on this is quite wrongm identifying Vienna as a macro virus:
