It is a dangerous memory resident parasitic virus. It hooks INT 1Ch, 21h and writes itself to the beginning of .COM files are loaded into the memory. While infecting a file it encrypts the original beginning of the file, and uses 10h bytes of BIOS as a encryption key. As a result the correct decryption and execution of these files is possible only on the computers with the same BIOS. If the original beginning of the file cannot be decrypted, the virus terminates the execution of the file (calls Terminate DOS function INT 20h) and starts its internal counters. According to its values the virus displays the red cross having the text in its center:
VINDICATOR
