ECU Virus

 Virus Name:  ECU 
 V Status:    Rare 
 Discovered:  March, 1993 
 Symptoms:    .EXE file growth; decrease in total system and available free 
 Origin:      England 
 Eff Length:  711 Bytes 
 Type Code:   PRhE - Parasitic Resident .EXE Infector 
 Detection Method:  Sweep, AVTK, F-Prot, ViruScan, IBMAV, 
                    NAV, NAVDX, VAlert, PCScan, ChAV, 
                    Sweep/N, NShld, AVTK/N, IBMAV/N, Innoc, NAV/N, LProt 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The ECU virus was submitted in March, 1993, and is originally from 
       England.  ECU is a memory resident infector of .EXE programs.  It 
       spreads quickly on infected systems. 
       When the first ECU infected program is executed, the ECU virus will 
       install itself memory resident at the top of system memory but 
       below the 640K DOS boundary, hooking interrupts 01, 03, 08, and 21. 
       Total system and available free memory, as indicated by the DOS 
       CHKDSK program, will have decreased by 1,488 bytes.  Interrupt 12's 
       return will not be moved. 
       Once the ECU virus is memory resident, it will infect .EXE programs 
       when they are executed or opened for any reason.  Infected .EXE 
       programs will have a file length increase of 711 bytes with the 
       virus being located at the end of the file.  The program's date and 
       time in the DOS disk directory listing will not be altered.  The 
       following text strings are encrypted within the ECU viral code: 
               "[ECU] So This is a Well Hard ECU!" 
               "Apache Warrior, ARCV Pres." 
       It is unknown what ECU does besides replicate. 

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