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- These versions of !Killer (1.17) and VProtect (1.06) know about nine
- families of virus for the Acorn Archimedes/A3000/A5000 range of computers.
-
- These are :
-
- * Extend
- * Icon (also known as Filer), and known variants
- * FF8 (also known as Archievirus)
- * RISCOSext (also known as Thanatos)
- * DataDQM (also known as Vigayvirus)
- * CeBit
- * MyMod
- * TrapHandler/NetManager
- * Module
-
- The alternative names mentioned are those used by the authors of other virus
- detection/removal software.
-
- Should you discover a virus which is not understood by !Killer and VProtect
- (or a new variant of one of those above) please contact the Customer
- Services department at Acorn, including a clearly marked disc containing an
- example of infected file.
-
- VProtect can prevent infected !Boot files from doing any damage. It achieves
- this by parsing the !Boot file before it is executed. Should it find a line
- which is known to be used by a virus, an error will be generated and the
- !Boot file will not be executed.
-
- !Killer is much more versatile, providing the following facilities:
-
- * Detection and removal/disabling of any viruses already resident
-
- * Self verification to avoid becoming a carrier for a virus
-
- * Searching a file storage device for any infected files, with the ability
- to remove them completely (including viruses which merge themselves with
- files).
-
- * Detection and removal of any viruses loaded whilst !Killer is loaded
-
- Fuller documentation of !Killer is in the !Help file within !Killer's
- directory.
-
- The following sections give a brief summary of the nine known viruses. It
- does not attempt to be a technical analysis or description, but simply gives
- an overview of the nature of each virus, and it's possible effects.
-
- Of necessity, our definition of the term virus takes a very broad view of
- the genre. Anything designed to reproduce itself and/or cause unwanted
- events is considered a virus.
-
- The majority of the viruses documented below alter !Boot files to get
- themselves loaded. This means that all you have to do to get a virus in
- memory is to open a directory viewer on an infected application!
-
-
- The Known Viruses
- -----------------
-
- 1) Extend
-
- This lives in applications, using one of eight possible names. It
- modifies/creates a !Boot file to load itself. Apart from claiming more and
- more memory (eventually causing the system to run out of memory) it is
- harmless, but very contagious.
-
- Quick Check : Press <F12> and type 'help extend' - a message of the form
- 'Module is...' indicates that it's loaded.
-
- 2) Icon (also known as Filer)
-
- There are a number of variants of this around - five have been encountered
- already. All use !Boot files to propagate. One variant does nothing apart
- from spread itself. The others generate a nonsensical error message when they
- is first loaded.
-
- Quick Check : a file called Icon, Poison or NewVirus(!) inside an
- application which is filetyped as a sprite, but is actually BASIC.
-
- 3) FF8 (also known as ArchieVirus)
-
- This is by far the oldest virus, but various bugs in it's coding make the
- chances of it successfully infecting other programs quite small.
-
- Unlike most other viruses discussed here it works by merging itself with
- files typed FF8 (Absolute).
-
- On the 13th of the month any infected application will fail to run, giving
- the message 'Archievirus strikes again'.
-
- Quick Check : Load a file into !Edit, and look for '1210' at the end of the
- file (though 'Hypo1210' indicates an innoculation instead).
-
- 4) RISCOSext (also known as Thanatos)
-
- This is by far the worst of the viruses discussed here. It has various nasty
- things on particular dates, with a random chance of something happening at
- any time. Any outbreaks of this virus should be treated rapidly to avoid any
- chance of data loss.
-
- Quick Check : Look in the Task Manager display for 'Thanatos'.
-
- 5) DataDQM (also known as VigayVirus)
-
- This one causes the screen to judder an increasing amount during each
- Thursday.
-
- Quick Check : An application called 'TaskManager' - not to be confused with
- the real 'Task Manager' which will appear in the list of module tasks.
-
- 6) CeBit
-
- Aside from infecting applications (via the !Boot file as usual) it will stop
- proceedings on every 16th infection to display a message from 'Devil, The
- Lord of Darkness'. This virus was discovered in Germany, and is not thought
- to have spread to the UK yet.
-
- Quick Check : press <F12>, then 'help tlodmod'. A message of the form
- 'Module is...' shows that it is loaded.
-
- 7) MyMod
-
- This is a harmless virus, which will display a message on each Friday 13th.
- It can exist in two forms, the first being the trojan used to initially
- release it, and the second being the form in which it infects applications.
-
- Quick Check : press <F12> then 'help mymod'. A message of the form 'Module
- is...' shows that it is loaded.
-
- 8) NetManager/TrapHandler
-
- This is a variation of the !Boot theme, with the whole virus being in the
- !Boot file.
-
- Quick Check : press <F12> then 'help netmanager' or 'help traphandler'. A
- message of the form 'Module is...' shows that it is loaded.
-
- 9) Module
-
- This is quite different, and works by appending it's code to any modules
- loaded whilst an infected module is active. It then redirects some of the
- module entry points to itself (and then on to the original entry points).
-
- Quick Check: Any modules with changed timestamps, and have grown by almost
- 1K are potential suspects. Loading the module in to !Edit will reveal the
- ASCII string 'Press any key to continue'.
-