Acid Virus

 Virus Name:  Acid 
 V Status:    Viron 
 Discovery:   August, 1992 
 Symptoms:    .COM & .EXE programs overwritten; programs fail to execute 
 Origin:      Unknown 
 Eff Length:  792 Bytes 
 Type Code:   ONAK - Overwriting Non-Resident .COM & .EXE Infector 
 Detection Method:  F-Prot, ViruScan, NAV, NAVDX, AVTK, PCScan, ChAV, 
                    NShld, NProt, NAV/N, LProt, AVTK/N, Innoc 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Acid virus was submitted in August, 1992.  Its origin or point 
       of isolation is unknown.  Acid is a non-resident, direct action 
       overwriting virus which infects .COM and .EXE programs, including 
       When a program infected with the Acid virus is executed, this virus 
       will infect all of the .EXE programs located in the current 
       directory.  Later, if an infected program is executed, it will 
       start infecting the .COM programs in the current directory. 
       Programs infected with the Acid virus will have had the first 792 
       bytes of the host program overwritten with the Acid virus' code. 
       There will be no file length increase unless the original host 
       program was smaller than 792 bytes, in which case it will become 
       792 bytes in length.  The program's date and time in the DOS 
       disk directory listing will not be altered.  The following 
       text strings can be found in all Acid infected programs: 
               "*.EXE *.COM .." 
               "Program too big to fit in memory" 
               "Acid  Virus" 
               "Legalize ACiD and Pot" 
               "By: Copyfright Corp-$MZU" 

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