Silly Willy Virus

 Virus Name:  Silly Willy 
 V Status:    Rare 
 Discovered:  July, 1992 
 Symptoms:    .COM file growth; .EXE files altered; display; diskette 
 Origin:      Unknown 
 Eff Length:  2,268 - 2,313 Bytes 
 Type Code:   PNAK - Parasitic Non-Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, Sweep, F-Prot, AVTK, NAV, NAVDX, PCScan, 
                    NShld, Sweep/N, NAV/N, LProt, AVTK/N, Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Silly Willy virus was submitted in July, 1992.  Its origin or 
       point of isolation is unknown.  Silly Willy is a non-resident 
       direct action infector of .COM files, including COMMAND.COM.  It 
       also trojanizes .EXE programs. 
       When a program infected with the Silly Willy virus is executed, it 
       will infect or trojanize up to two programs on the C: drive.  The 
       virus will first look for the programs in the C: drive root 
       directory, and then move downward as necessarily in the directory 
       structure.  Infected .COM programs will have a file length increase 
       of 2,268 to 2,313 bytes with the virus being located at the 
       beginning of the file.  Trojanized .EXE programs will not have any 
       file length increase.  The programs date and time in the DOS disk 
       directory listing will not be altered. 
       When the user executes an .EXE program which has been trojanized 
       by the Silly Willy virus, the system display will be cleared, and 
       an animated face will appear in the upper left hand corner of the 
       screen, accompanied by the following text: 
               "Hello, I'm Silly Willy! - 
                Now I'm formating Your HARDDISK! 
                That's fine! - Isn't it (har,har)..." 
       The C: drive will be accessed, though the disk is not formatted 
       by the virus.  After a short period of time, the screen will be 
       cleared and the following message displayed: 
               "ERROR: No SYSTEM found! 
                No files on drive C: 
                Insert SYSTEM diskette in drive A: and push any key!" 
       The virus will then attempt to format the A: drive. 

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