Virus Name: Wasp
Aliases: SSI 1.0, Wasp.629
V Status: New
Discovered: July, 1994
Symptoms: .COM file growth;
decrease in total system & available free memory
Eff Length: 629 - 637 Bytes
Type Code: PRhCK - Parasitic Resident .COM Infector
Detection Method: F-Prot, AVTK, IBMAV, ViruScan, Sweep, NAV,
NAVDX, VAlert, PCScan, ChAV,
AVTK/N, Sweep/N, IBMAV/N, NShld, Innoc, NAV/N, NProt
Removal Instructions: Delete infected files
The Wasp, Wasp.629 or SSI 1.0, virus was received in July, 1994. Its
origin or point of isolation is unknown. Wasp is a memory resident
infector of .COM programs, including COMMAND.COM.
When the first Wasp infected program is executed, this virus will
install itself memory resident at the top of system memory but below
the 640K DOS boundary, not moving interrupt 12's return. Total system
and available free memory, as indicated by the DOS CHKDSK program,
will have decreased by 592 bytes. Interrupt 21 will be hooked by the
virus in memory.
Once memory resident, the Wasp virus will infect .COM programs when
they are executed. Infected programs will have a file length increase
of 629 to 637 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 is visible within the
viral code in all Wasp infected programs:
"SSI v. 1.00"
It is unknown what Wasp may do besides replicate.
Known variant(s) of Wasp are:
Wasp.909: Also known as SSI 2.01, Wasp 909 is a later version of
the Wasp virus described above. Its size in memory is 928 bytes,
hooking interrupt 21. It infects .COM and .EXE files, including
COMMAND.COM, when they are executed. Infected .COM programs
increase in size by 946 to 958 bytes, while .EXE programs
increase in size by 909 to 919 bytes. In both cases, the virus
will be located at the end of the file. The following text string
can be found within the viral code in all infected programs:
"SSI v. 2.01"
Origin: Unknown July, 1994.