Jeff Virus

 Virus Name:  Jeff 
 Aliases:     June 7 
 V Status:    Rare 
 Discovered:  December, 1990 
 Symptoms:    .COM growth; overwritten sectors on hard disk 
 Origin:      United States 
 Eff Length:  814 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, AVTK, F-Prot, Sweep, PCScan, 
                    IBMAV, NAV, NAVDX, VAlert, ChAV, 
                    NShld, Sweep/N, Innoc, NProt, AVTK/N, NAV/N, IBMAV/N, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Jeff virus was isolated in the United States in December, 1990. 
       This virus is a non-resident infector of .COM files, including 
       When a program infected with the Jeff virus is executed, the virus 
       will attempt to infect one .COM file on the C: drive, starting in 
       the root directory.  Infected .COM files will increase in size by 
       814 to 828 bytes, with the virus being located at the end of the 
       infected program. 
       The Jeff virus received its name from the following text string 
       which is encrypted in the viral code: 
               "Jeff is visiting your hard disk" 
       While Jeff is visiting your hard disk, it will occasionally write 
       some sectors of random memory contents to the hard disk.  If these 
       sectors are written to the boot sector, master boot sector, or FAT, 
       the contents of the disk may become inaccessible or produce 
       unexpected results. 

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