Virus Name: Squeaker
V Status: Rare
Discovered: November, 1991
Symptoms: .COM & .EXE growth; decrease in total system and available
free memory; Scan.Exe will be deleted if executed; file
Eff Length: 1,091 Bytes
Type Code: PRhAK - Parasitic Resident .COM & .EXE Infector
Detection Method: ViruScan, AVTK, Sweep, F-Prot, ChAV,
NAV, IBMAV, NAVDX, VAlert, PCScan,
NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N,
Removal Instructions: Delete infected files
The Squeaker virus was received from Europe in November, 1991.
Squeaker is a memory resident infector of .COM and .EXE programs,
The first time a program infected with Squeaker is executed, the
virus will install itself memory resident at the top of system
memory but below the 640K DOS boundary. Total system and available
free memory, as indicated by the DOS CHKDSK program, will have
decreased by 1,136 bytes. Interrupt 12's return will not have been
moved. Interrupts 1C and 21 will be hooked by the virus.
Once Squeaker is memory resident, it will infect .COM and .EXE
programs when they are executed. If COMMAND.COM is executed, it
will also become infected. Programs infected with Squeaker will
have a file length increase of 1,091 bytes with the virus being
located at the end of the infected file. The file's date and
time in the DOS disk directory will have been updated to the system
date and time when infection occurred.
A symptom of a Squeaker infection is that once the virus is memory
resident, if the system user attempts to executed Scan.Exe, Scan.Exe
will be deleted. The user will then be returned to the DOS prompt.
It is unknown if Squeaker contains any other damage potential.