Is SetFsb a Trojan?

This was sent to me by a friend who wanted to stay anonymous:

There’s a utility called SetFSB which tweaks the clock speed for overclocking stuff.
It was written in Japan, and is used for many years already.
Recently it came to me that I can speed up my old machine by 25% so I dl’ed it as well,
however, when running, I discovered that upon termination, the .exe creates 2 files,
1 batch file and 1 executable.
The batch file is being spawned, and starts a loop trying to delete the original executable, and continues indefinitely until it’s deleted. after that it will rename the new .exe to the be the same name as the old one.
Now, isn’t that suspicious?
I’ve tried googling it, and just found 1 reference in PCTool’s ThreatFire, but the shmucks just got the threat and couldn’t see the .exe and .bat, so they just decided it’s a false alarm and whitelisted the utility.
I thought it would be a good idea to contact the author, give him a chance to explain, and this is message train, which I find very funny:

there’s a uility called SetFSB which tweeks the clock speed for overclocking stuff.
It was written by some Jap, and is used for many years already.
Recently it came to me that I can speed up my old machine by 25% so I dl’ed it as well,
however, when running, I discovered that upon termination, the .exe creates 2 files,
1 batch file and 1 executable,
the batch file is being spawned, and starts a loop trying to delete the original executable, and continues indefinitely until it’s deleted. after that it will rename the new .exe to the be the same name as the old one.
Now, isn’t that suspicious?
I’ve tried googling it, and just found 1 reference in PCTool’s ThreatFire, but the shmucks just got the threat and couldn’t see the .exe and .bat, so they just decided it’s a false alaram and whitelisted the utility.
I thought it would be a good idea to contact the author, give him a chance to explain, and this is message train, which I find very funny:

ME>>>

Dear Mr.

Why after exiting SetFsb, it will create a .bat and new .exe
the .bat will loop to try delete the old .exe, and rename the new .exe to old .exe ?

Thanks!

HIM>>>

Hi,

Yes,

abo

ME>>>

Hello.

Yes… good…

but WHY???
is it a VIRUS?

thanks!

HIM>>> (here comes the good part :) )

I do not have a lot of free time too much.
Why do you think that i support you free of charge?

ME>>>

to make viruses?

HIM>>> (this is the original font color and size he used!!!)

I do not have a lot of free time too much!

ME>>> (trying to hack his japanese moralOS v0.99)

Please, dear Abo,

You must understand. People start to be VERY worried about your software,
because it behave like a virus.
If you will not give a good explanation to WHY it behave like this,
then people will stop using it, and stop trusting you forever.
Then your name will become bad, and you will have a lot of shame.
I only try to help you.

I hope you understand!

HIM>>>

It is unnecessary. Please do not use SetFSB if you are worried.

Personally, I’m not sure who’s more weird: my friend, overclocking his computer in 2011, or the Japanese programmer not willing to explain if his downloadble program is a Trojan or not.

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  • http://anti-virus-rants.blogspot.com kurt wismer

    program A creates program B and then is replaced by program B?

    presumably this tool is intended to be used more than once, so i’m guessing program A and B are functionally identical (if not binary identical).

    if this is the case then the program is in fact self-replicating and thus satisfies the formal definition of a virus.

    it’s not the first case of a presumably useful utility exhibiting viral behaviour, but it is rare enough that i can’t point to the other 2 instances i’m thinking of.