Big Joke Virus
Virus Name: Big Joke
V Status: Rare
Discovery: November, 1991
Symptoms: .COM file growth; file date/time change; message
Eff Length: 1,068 Bytes
Type Code: PNC - Parasitic Non-Resident .COM Infector
Detection Method: ViruScan, Sweep, AVTK, F-Prot, ChAV,
NAV, IBMAV, NAVDX, VAlert, PCScan,
NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N,
Removal Instructions: Delete infected files
The Big Joke virus was received in November, 1991. Its origin is
unknown. Big Joke is a non-resident, direct action infector of
.COM files. It will not infect COMMAND.COM.
When a program infected with Big Joke is executed, the virus will
infect one previously uninfected .COM program located in the
current directory. Programs infected with Big Joke will have
increased in size by 1,068 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 current system
date and time when infection occurred.
The Big Joke virus will occassionally display a message to the
user when an infected program is executed. When this message is
displayed, it is written one line at a time to the center of the
display. When the message completes, it will be repeated until
the system is rebooted. The message text is:
"At last ...... ALIVE !!!!!
I guess your computer is infected by the Big Joke Virus.
Lucky you, this is the kind version.
Be more careful while duplicating in the future.
The Big Joke Virus, killer version, will strike harder.
The Big Joke rules forever."
The above message's text strings can be found in files infected
with Big Joke, as well as the following two additional text
Big joke, in its currect version, does not do anything besides
replicate and display its message.