The many testimonies at the link to the Nirsoft blog surely indicate a 
widespread problem with false positive reports, in general.  I think it's a 
good link to read, and the AV companies should be doing a better job here, no 
question.

In specific though, how are we as users supposed to know that emailer.exe (in 
this case) is not infected/corrupted/tampered-with?

What does this file do?   (I don't know)
What is it's correct size and checksum?  (I don't know)
What about it causes it to be flagged as dangerous?  (etc.)

The fact of malicious attacks against AmiBroker.com has been mentioned before 
on this list.  How is a user supposed to know that an attack has not taken 
place, and resulted in a corrupted distro?

I know at least one other TA platform vendor that provides MD5 checksums for 
their distro files.  When the distro matches the checksum, this makes me feel 
much more secure that it has not been tampered with.

Could even that assurance be rendered false by a sufficiently determined 
criminal?   Probably, but if both the file and the checksum were tampered with, 
it should at least be possible to compare with completely offline records 
maintained by the developer to determine that this had taken place.

Could a file be corrupted and made to have the same size and checksum?  I'll 
leave that question to those more expert than I.  Even if so though, it's 
surely a much higher bar to clear.

As a thought experiment - assume that a criminal organization has targeted and 
corrupted an AB distro to make it into malware (of some sort).  Assume further 
that that corrupted file is on the AB server(s) and being downloaded by 
customers.

How are we supposed to know it?  What should make us suspicious?  If suspicion 
is raised, how is corruption to be confirmed or refuted?

These are questions I personally do not have a good answer for.  I only know 
that AV programs are an important line of defense.  They make me aware of 
things (rightly or wrongly) that I do not have the particular psychic ability 
to be otherwise aware of.

Being simply told to ignore them, with no further explanation or evidence, is 
not very reassuring.


--- In amibroker@yahoogroups.com, Tomasz Janeczko <gro...@...> wrote:
>
> Hello,
> 
> That is FALSE positive. You should report it to anti-virus vendor that 
> they have bug in their program.
> 
> You should probably read this:
> http://blog.nirsoft.net/2009/05/17/antivirus-companies-cause-a-big-headache-to-small-developers/
>  
> 
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> 
> On 2010-03-20 21:53, gsmservplus wrote:
> > emailer.exe file in AB directory.Kaspersky found backdoor.win32.RAdmin.bp 
> > trojan, criticality High
> > ??????????????????????????????????????????????
> >
> > is it fake or it`s realy something wrong?
> >
> >
> >
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