Virus Name: 4Res
V Status: Rare
Discovery: November, 1993
Symptoms: .COM & .EXE growth; system boot failure; system hangs
Eff Length: 1,049 Bytes
Type Code: PNAK - Parasitic Non-Resident .COM Infector
Detection Method: AVTK, IBMAV, ViruScan, F-Prot, NAV, Sweep,
NAVDX, VAlert, PCScan, ChAV,
NProt, AVTK/N, NShld, Sweep/N, NAV/N, IBMAV/N, Innoc
Removal Instructions: Delete infected files
The 4Res virus was received in November, 1993. Its origin or point
of isolation is unknown. 4Res is a non-resident, direct action
infector of .COM and .EXE programs, including COMMAND.COM.
When a program infected with the 4Res virus is executed, this virus
will infect one .COM or .EXE program located in the current
directory. Programs infected with the 4Res virus will have a file
length increase of 1,049 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 string
can be found within the viral code in all infected programs:
"4RESPATH=COMSPEC=*.COM *.EXE 4RES"
System hangs frequently occur when infected .COM programs are
executed. Additionally, once the boot copy of COMMAND.COM becomes
infected, the system will fail to boot from the infected drive.