Virus Name: HH&H
Aliases: Gomb, GMB
V Status: Rare
Discovered: April, 1992
Symptoms: .COM file growth; decrease in total system and available free
memory; file date/time change
Eff Length: 4,091 Bytes
Type Code: PRhCK - Parasitic Resident .COM Infector
Detection Method: AVTK, ViruScan, F-Prot, IBMAV, ChAV,
Sweep, NAV, NAVDX, VAlert, PCScan,
NShld, Sweep/N, LProt, Innoc, NProt, IBMAV/N,
Removal Instructions: Delete infected files
The HH&H virus was submitted in April, 1992. Its origin is
unknown. HH&H is a memory resident infector of .COM programs,
When the first HH&H infected program is executed, the HH&H 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 6,144 bytes. Interrupts 1C and 21 will be hooked by HH&H in
Once the HH&H virus is memory resident, it will infect .COM
programs over approximately 8K in size when they are executed.
If COMMAND.COM is executed, it will become infected. Programs
infected with the HH&H virus will have a file length increase of
4,091 bytes. The virus will be located at the end of the
program. The file's date and time in the DOS disk directory
listing will have been updated to the current system date and time
when infection occurred.
The following text strings are encrypted within the HH&H virus'
code, and hence are not visible in infected files:
"HARD HIT & HEAVY HATE the HUMANS!!"
"[ H.H.& H.H. ]"
It is unknown what HH&H does besides replicate.