maliciously

/məˈlɪʃəsli/
adverb
  1. In a way that shows a desire to cause harm, pain, or trouble to others.
    • He smiled maliciously as he watched his plan unfold.
    • The cat maliciously knocked the vase off the shelf, then looked innocent.
    • She maliciously spread false rumors about her coworker to ruin his reputation.