It infects Corel SCRIPT files. Corel SCRIPT is a utility which allows Corel software to run macro-like programs written in the Corel SCRIPT language, which is like BASIC. When an infected script is invoked, the virus looks for a victim .CSC (Corel SCRIPT) file in the current directory. If an uninfected victim exists, it renames it to MALLORN.TMP, creates a new file containing a copy of the virus, and then appends the original script from MALLORN.TMP.