The Thunderbyte Anti-Virus utilities  provide a collection of  sophisticated
  programs which offer various ways to check for, identify and remove known as
  well as unknown viruses from hard and floppy disks on PCs or across networks.

  TBAV is upgraded every two months.  Free hotline support is provided for all
  registered users via telephone, fax and electronic bulletin board.  Read the
  comprehensive documentation files for detailed info. BBS:+31 (0)24 64 50 951
$

TbScan is written by Frans Veldman.

Usage: TbScan [@][<path>][<filename>...] [<options>...]

Command line options available:

help                    he  =help (? = short help)
pause                   pa  =enable "Pause" prompt
mono                    mo  =force monochrome
quick                   qs  =quick scan (uses Anti-Vir.Dat)
allfiles                af  =scan non-executable files too
allexec                 ae  =scan non-executable files for binary viruses
alldrives               ad  =scan all local non-removable drives
allnet                  an  =scan all network drives
heuristic               hr  =enable heuristic alerts
extract                 ex  =extract signature (registered only)
once                    oo  =only once a day
slowscroll              ss  =enable conventional (slow) scrolling
secure                  se  =user abort not allowed (registered only)
compat                  co  =maximum-compatibility mode
ignofile                in  =ignore no-file-error
largedir                ld  =use large directory table
fatcheck                fc  =check the FAT for errors
fatinfo                 fi  =display amount of fragmented files
old                     ol  =disable "this program is old" message
noboot                  nb  =skip bootsector check
nofiles                 nf  =skip scanning of files
nomem                   nm  =skip memory check
hma                     hm  =force HMA scan
nohmem                  nh  =skip UMB/HMA scan
nosub                   ns  =skip sub directories
noautohr                na  =no auto heuristic level adjust
nowin                   nw  =do not scan for Windows/OS2 viruses
repeat                  rp  =scan multiple diskettes
audio                   aa  =make noise if virus found
batch                   ba  =batch mode (no user input)
clean                   cl  =clean infected objects if possible
erasemacros             em  =erase all macros from objects if possible
delete                  de  =delete infected files
kill                    ki  =kill infected files
truename                tn  =use truename instead of DOS name
log                     lo  =output to log file
append                  ap  =log file append mode
expertlog               el  =no heuristic descriptions in log
logname   =<filename>   ln  =set path/name of log file
loglevel  =<0..4>       ll  =set log level
wait      =<0...255>    wa  =number of timerticks to wait.
rename    [=<ext-mask>] rn  =rename infected files
exec      =.<ext-mask>  ee  =specify executable extensions

$
WARNING!
$

 WARNING! memory
$

  Since an active virus in memory  may interfere with the
  virus  scanning  process, it is  highly  recommended to
  immediately power down the system, and to reboot from a
  write-protected clean system diskette!

  Note: if you used any virus scanner just before you invoked
  TbScan, it's possible  that TbScan detected  a signature of
  the other scanner in  memory,  rather than an actual virus.
  In that case you should ignore this warning.
  Do you want to Q)uit or to C)ontinue? (Q/C)
$
  This version of TbScan is more than 6 months old!
  Statistics show that the amount of different viruses
  doubles about every nine months. For the safety of your
  data it is highly recommended to obtain a more recent
  version of TBAV.

  Consult the file Agents.Doc for information about TBAV
  agents, or consult ESaSS B.V. in The Netherlands:
        Phone: +31 (0)24 64 88 555
        Fax:   +31 (0)24 64 50 899
        BBS:   +31 (0)24 64 50 951

  Press any key to continue...
$

  You specified option 'allfiles'!

  Since there are no viruses that only infect non-executable files, it
  is really sufficient to scan executable files only!

  The only time you should use option 'allfiles' is after you found at
  least one virus in an executable file.

  Be aware that because of the complex nature of TbScan (it performs
  emulation and disassembling of the file being scanned) treating data
  files as executable files causes unpredictable results. False alarms
  may occur.

  Press any key to continue...
$

  Insert a disk to be scanned, press "Esc" to cancel...
$
 Sigfile entries:

 File system:

 Directories:
 Total files:
 Scanned files:
 CRC verified:
 Changed files:
 Infected items:

 Elapsed time:
 Kb / second:
$
found
$
infected by
$
dropper of
$
damaged by
$
joke named
$
garbage: (not a virus)
$
trojan named
$
probably
$
might be
$
virus
$
Has been changed!
$
an unknown virus
$

Option 'once' already used today.

$
Error: directory table overflow! Use option 'largedir' (ld).
$
Error: not enough memory!
$
No executable files found!
$
Error: Can not access specified disk!
$
Error: Can not create logfile!
$
invalid allocation size!
$
contains an invalid cluster number!
$
contains cross linked clusters!
$
 fragmented files or directories.
$
 bad marked clusters,
$
 lost clusters,
$
 files with invalid size,
$
 invalid cluster numbers,
$
 cross linked clusters,
$
use a disk repair utility to correct!
$
This unregistered version of TbScan has a few limitations:
- Options 'extract' and 'secure' are not available!
- This version will not execute when put on a network drive. You need to
  install it on your local drive. However you can scan your network drives,
  as long as TbScan itself is put on a local drive.

These limitations will disappear after you have registered TBAV!
Select 'Register' from the TBAV main menu for more information.
$

  The license or evaluation period of this TBAV software has been
  expired! Extension of a license comes with 50% discount on the
  initial license fee.

  Please contact your TBAV distributor for more information or
  select 'Register' from within the TBAV main menu.

$
Process aborted by user!
$
No drives to be scanned found!
$

Heuristic flags:
$
c  No checksum / recovery information (Anti-Vir.Dat) available.
$
C  The checksum data does not match!  File has been changed!
$
F  Suspicious file access.  Might be able to infect a file.
$
R  Relocator.  Program code will be relocated in a suspicious way.
$
A  Suspicious Memory Allocation.  The program uses a non-standard
   way to search for, and/or allocate memory.
$
N  Wrong name extension. Extension conflicts with program structure.
$
S  Contains a routine to search for executable (.COM or .EXE) files.
$
#  Found a code decryption routine or debugger trap.  This is common
   for viruses but also for some copy-protected software.
$
V  This suspicious file has been validated to avoid heuristic alarms.
$
E  Flexible Entry-point.  The code seems to be designed to be linked
   on any location within an executable file.  Common for viruses.
$
L  The program traps the loading of software.  Might be a
   virus that intercepts program load to infect the software.
$
D  Disk write access.  The program writes to disk without using DOS.
$
M  Memory resident code.  The program might stay resident in memory.
$
!  Invalid opcode (non-8088 instructions) or out-of-range branch.
$
T  Incorrect timestamp.  Some viruses use this to mark infected files.
$
J  Suspicious jump construct.  Entry point via chained or indirect
   jumps.  This is unusual for normal software but common for viruses.
$
?  Inconsistent exe-header.  Might be a virus but can also be a bug.
$
G  Garbage instructions.  Contains code that seems to have no purpose
   other than encryption or avoiding recognition by virus scanners.
$
U  Undocumented interrupt/DOS call.  The program might be just tricky
   but can also be a virus using a non-standard way to detect itself.
$
Z  EXE/COM determination.  The program tries to check whether a file
   is a COM or EXE file.  Viruses need to do this to infect a program.
$
O  Found code that can be used to overwrite/move a program in memory.
$
B  Back to entry point.  Contains code to re-start the program after
   modifications at the entry-point are made.  Very usual for viruses.
$
K  Unusual stack.  The program has a suspicious stack or an odd stack.
$
1  Found instructions which require a 80186 processor or above.
$
@  Encountered instructions which are not likely to be generated by
   an assembler, but by some code generator like a polymorphic virus.
$
X  Stealth capabilities.
$
Y  Bootsector violates IBM bootsector format.
$
t  Program contains a time or date triggered event.
$
p  Packed program.  A virus could be hidden inside the program.
$
i  Additional data found at end of file. Probably internal overlay.
$
h  The program has the hidden or system attribute set.
$
w  The program contains a MS-Windows or OS/2 exe-header.
$
.............