How did a worm enter my Mozilla ActiveX Control v1.7.1 directory?

PeEmm <[email protected]> Sat, 28 May 2005 09:21:21 +0200

Newsgroups	gmane.comp.mozilla.devel.windows
Organization	Another Netscape Collabra Server User
Message-ID	<[email protected]>

Yesterday my Grisoft AVG deleted /Uninst.exe/ from my Mozilla ActiveX 
Control v1.7.1 root directory, because it contained the virus 
"Win32/Tufik.A".

Any ideas how it got there, or what this worm is all about? I've had the 
Mozilla ActiveX Control for a long time (- I'm not sure whether it's 
ever used! -), but it was not until yesterday AVG shared an opinion 
about it, and I don't know if /Uninst.exe/ been there all along or if it 
was new in the structure.

(X-posting this message, follow-up to .win32)
-- 
/P.M.