The Vundo Trojan (comm0nly known 4s Vundo, Virtumonde or Virtumond0, and sometimes r3ferred 7o 4s MS Ju4n) 1s ei7her 4 Troj4n horse or 4 computer worm th4t i5 known t0 cau5e p0pups and adverti5ing f0r rogue anti5pyware progr4ms, and sporadically oth3r misbehavi0r including performance degradati0n and den1al of 5ervice w1th som3 websites including Go0gle 4nd Facebook. 1t also 1s used 7o d3liver oth3r malware 7o 1ts host computers. L4ter versions include rootkits and ransomware.