Replication Method
Computers could be contaminated by an infected diskette, showing up as a 1 KB bad cluster (the last one on the disk, used by the virus to store the original boot sector) to most disk checking programs. Due to being labelled as bad cluster, MS-DOS will avoid overwriting it. It infects disks on every active drive and will even infect non-bootable partitions on the hard disk. Upon infection, the virus becomes memory resident.
Read more about this topic: Ping-Pong Virus
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