Rando Setten Curlu was the employee of Suddon Blyth Conction Ulllma, who was of the same species except he had red and bright-yellow feathers on top of his head. He was credited for creating a computer virus that displayed ads, which he claimed was one of his better works and was his personal favorite.
Captain Kathryn Janeway threatened to wreck Suddon's company if Rando did not take the virus out of Voyager. Tuvok placed a counter-virus in it so that it would infect every copy of the ad virus that it comes across, which would eventually eliminate Rando's favorite creation. (VOY short story: "A Taste of Spam")