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Downloader Virus
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Post new topic   Reply to topic       All -> FavForums -> Norton Anti-Virus [del.icio.us!] [digg it!] [reddit!]
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Whatsthis4

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Joined: Jun 30, 2006
Posts: 3
Location: USA

PostPosted: Sun Jul 09, 2006 6:48 pm    Post subject:
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leek wrote:
Apparently entry occurs through user's PC, before they upload their data to their hosting provider or server. It does not compromise the server. The virus infects HTML files on a person's PC before they send them to the server, and it puts a malformed iframe tag at the top of the page, an iframe which references a Russian site:


I would have to disagree with the part about the files on the user's computer being infected. I have run numerous scans from different sources and have come up clean on all.

I admin. 3 other sites from this same computer and none of the other sites have been affected.

The code on my site changed without me uploading anything for up to 30 days prior. My site was hit twice with about 30 days between attacks. After the first attack I removed the line of code "live" through my site file manager which shouldn't have been affected by the files on my computer at all.

At this point, I would tend to look more towards the server being owned. I checked the files received by my server through anonymous ftp and found a few interesting files including one called zehir4.asp which from what I am reading is a server hack. I have since closed off all anon. access to my ftp. This may or may not be related but there are a total of 21 files and a folder that can't be seen from the inside and can't be touched from the outside. I am going to contact my admin see if they can be removed by them.

Although this is not my thread, thank you much for your information.

Jim

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leek

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Joined: Jul 07, 2006
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Location: USA

PostPosted: Sun Jul 09, 2006 7:16 pm    Post subject:
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Whatsthis4 wrote:

I would have to disagree with the part about the files on the user's computer being infected. I have run numerous scans from different sources and have come up clean on all.

There is always some lag between the time a new malware comes out, and the time that tools are able to detect it. Lack of finding it in a scan is not proof that it doesn't exist.

I think what is happening is this:
    * A person's PC is infected.

    * The infection installs a Trojan, which starts tracking their passwords.

    * The person logs into their web hosting site from their compromised PC, using ftp or some other common protocol.

    * Their uname and password are captured by the trojan on their PC.

    * Their uname and password are sent back to the Russian site by the trojan.

    * The Russian site's bot logs into their web hosting service using their captured uname and password, and adds the iframe to their home page.

    * Other people visit the home page, which redirects their browser to the Russian site, which infects their computer too, if they are vulnerable.

    * The process repeats.

The reason I think this is so:
    * It is affecting home pages on servers which do not even run Windows, which do not have a history of being infected (e.g. Linux/Unix). This is what caught my attention, and the attention of affected ISPs,

    * A friend of mine was able to make it stop once he changed his password.

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Whatsthis4

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PostPosted: Sun Jul 09, 2006 7:30 pm    Post subject:
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I would think after 60 days somebody would have updated a scanner to detect this and I am still clean as of yesterday. Not trying to anger you, but I just don't think I am infected. I do this for a living and sometimes go to great pains to certify a machine as clean. I also did manual searches for files you mentioned and they don't exist on my machine.

If I were infected I would think that the other 3 sites I admin would also be affected but they aren't, one of which I upload to daily.

Thanks again.

Jim

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leek

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Joined: Jul 07, 2006
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PostPosted: Sun Jul 09, 2006 8:21 pm    Post subject:
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Whatsthis4 wrote:
I would think after 60 days somebody would have updated a scanner to detect this and I am still clean as of yesterday.


The reports I've been able to find on the internet, and the few people I've talked to, have only seen this one for about the last 14 days. (I see you've had it longer.) I'm not saying it hasn't existed for 60 days; just that we haven't seen it for that long.

Quote:
Not trying to anger you but I just don't think I am infected.


No-one said you were infected Smile

I re-read your first post:

Quote:
Is your host Ipowerweb by chance?


As a matter of fact, my friend's site is hosted by IPowerWeb (I did a whois on his site's IP address.) So is the DMGenie site I pointed to earlier, which reported the same problem. So this may be a hole in IPowerWeb's servers, or the software they use. You are not crazy Smile

My friend talked to his provider (not sure it if was IPowerWeb or an in-between), and said:

A friend wrote:

I think it's fixed. I had to speak with the tech people. They agreed with you. And they're taking some kind of serious interest in this. They said it was happening increasingly. I found out a similar code was inserted in the top of my home page for (his other site -- redacted). It wasn't the exact IP number, but similar.

What had to be done, which fixed it, is load just that new page without the code. Saved on the site. But prior to doing this I had to change the passwords for both. They got the passwords and broke into my sites.

So, when I made the change the first time, the tech people pointed out that since I hadn't changed the password, the hackers had it set up so it would automatically break in again. Since I've changed passwords for both, everything seems fine.


Whatsthis4 wrote:
I do this for a living and I believe I am clean. Did manual searches for files mentioned also and they don't exist.


No-one's questioning your ability to do a good job Smile

I'm not saying I'm right and you're wrong; I'm just trying to make an educated guess, as I'm sure you are too. I'm sure we'll know more in the days ahead.

I suggest all ISPs, webmasters, and hosting providers block the Russian netblock 81.95.144/22 from accessing their servers. That should slow it down at least. The netblock you mentioned from Taiwan might also be a candidate for blocking ( 218.210.8/22 ).

FWIW, I'm a software engineer; I've been programming since the early 1980s; I write assembly code, C, and (cough!) Fortran on Unix/Linux servers and supercomputers. At home I administer Win32, Linux, OpenBSD, and HP-UX machines.

Quote:
Thanks again.

Jim


Sure.

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Will

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IP: 213.189.*.*






PostPosted: Fri Jul 14, 2006 9:23 am    Post subject: similar case but frustrating difference
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This is the only forum where I found this mentioned, so I thought I'd present my version of the problem after spending most of yesterday with my hosting support (unable to solve it). Because we worked through most of what's mentioned in other posts please allow me to just give the basic facts.

1. Only people using IE have told me about the problem if their anti-virus threw up a message.

2. I tried it from several computers that have not visited my site before. Same thing.

3. Watching the status bar at bottom, I see that when typing in the domain name, the address being connected to is dnv-counter.com/rtf/gc... then the virus alert goes off.

4. I checked an IP look up and this name has an IP in Ukraine and the number is 85.255.177.90

5. Yesterday, I would see first the dnv business and then a second IP address which was 81.95.146.132 , the same Russian Business Network mentioned in an earlier post.

6. If I type in w w w.mydomain.com what I call "the virus process" starts and I can see the address in the bottom status bar.

7. However if I type w w w.mydomain.com/index.htm or any other internal address, I do not see the process.

8. My index.htm is a simple refresh to another program. We wrote a new one last night and installed from Host Support's end.

9. If I view the source code when I type in my domain and the DNV-Counter appears in the bottom status bar, but Before the page actually (refreshes) redirects to my internal page, I see that a long javascript code as been placed on the initial index.htm page.

10. We looked for the iframe coding mentioned here but found nothing.

11. Yesterday the blocked Russian IP was accessing what Norton called a downloader. Today the DNV-counter.com is trying for MSN.exe


So we are stumped trying to find out how this is working. It seems like the same as described above, but without the iframe code. We can't figure out what is creating the encoded Javascript on the index page, which we assume contains the dnv-counter.com address

Any help or suggestions would be hugely appreciated.

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Bad_Frogger

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Joined: May 12, 2006
Posts: 507
Location: Canada

PostPosted: Fri Jul 14, 2006 10:19 am    Post subject:
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I may be way out in left field here,
because of the different result you get based on your 2
example URL's.
This makes me think perhaps they are pulling off some
fairly high level DNS poisoning in your case.
I put nothing past those bastards, we are talking BIG money.
They change domains like socks.

Just a few thoughts.


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Will

Guest
IP: 62.150.*.*






PostPosted: Fri Jul 14, 2006 10:23 am    Post subject: dns poisoning
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Thanks for comments. Is that something that can be handled by my host support, or someone else? This successfully flew over my head (and skill level).

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Bad_Frogger

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Joined: May 12, 2006
Posts: 507
Location: Canada

PostPosted: Fri Jul 14, 2006 10:39 am    Post subject:
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I only thought of it because in your 2 URL's
you got different results.
I would believe they would resolve slightly differently,
possibly skipping the DNS server that the Botmaster
Puss Sacs have control over or have poisoned.
I know from the Blue Frog SPAM war that these baddies
have people on the inside. Very high up the internet
food chain. Backbone providers if you will.
If I could in detail explain the exact mechanics of how
they do it I would.
It might be worth running the concept by your hosting
people.
Would you care to share your URL for any further
investigation?
Just curious now on the nature/purpose of your threat.

PS. I went to DNV-counter.com and got an apache server test page.


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Will

Guest
IP: 62.150.*.*






PostPosted: Fri Jul 14, 2006 11:14 am    Post subject: dnv
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The complete address I see on the bottom is dnv-counter.com/trf/gc

If you only go to the domain name you do see that apache test page, but the other complete address is where the fun is.

If you check out the whois, the domain name is registered to a woman in NY.

I will pm my domain to you.

Thanks again for the help.

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ecd

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Joined: May 18, 2006
Posts: 154


PostPosted: Fri Jul 14, 2006 4:05 pm    Post subject:
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I have blocked that entire bank of IP's in my firewall and router and have changed the passwords on the website hosts that I manage. Might have to change the passwords once a month or so.....

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Bad_Frogger

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Joined: May 12, 2006
Posts: 507
Location: Canada

PostPosted: Fri Jul 14, 2006 11:00 pm    Post subject:
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Will and all,
All i have found so far regarding the exploit.

From XPL:
A javascript is using a decryption technique to expose code which is suspected to contain a Javascript window() (CVE-2005-1790) exploit. A malicious web page uses javascript to create a very large buffer of data and passes this into the prompt() function. This then causes Microsoft Internet Explorer to crash and with the presence of properly injected code can cause the remote execution of that code.

From F-Secure:
F-Secure Anti-Virus contains generic detection for a exploit that takes advantage of the vulnerability in the way Internet Explorer handles certain objects within onLoad event, allowing execution of arbitary code.

Further information about this vulnerability is available from Microsoft Security Advisory 911302:

http://www.microsoft.com/technet/security/advisory/911302.mspx

Hope this helps.
Bad out.


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Will

Guest
IP: 62.150.*.*






PostPosted: Mon Jul 17, 2006 2:07 am    Post subject: appears to have stopped
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I wanted to thank everyone who helped with this. I don't know how or why but the problem appears to have stopped. I have been sending lots of emails to my hosting company and to my domain name registrar godaddy.com so who knows, maybe one of them did something.

In any case, thanks everyone.

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GHowley

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Joined: Aug 02, 2006
Posts: 1
Location: USA

PostPosted: Wed Aug 02, 2006 6:04 pm    Post subject:
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FYI, this nailed me on 7/18/06. I only noticed because the iframe was inserted before my php headers, which caused a bunch of ugly error messages. I'm bookmarking this topic and will refer back to it if anyone posts any new news.

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ecd

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Joined: May 18, 2006
Posts: 154


PostPosted: Thu Aug 03, 2006 5:08 am    Post subject:
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GHowley wrote:
FYI, this nailed me on 7/18/06. I only noticed because the iframe was inserted before my php headers, which caused a bunch of ugly error messages. I'm bookmarking this topic and will refer back to it if anyone posts any new news.


So why do you still have it in the code of your blog page at the link you posted?

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^_^

Guest
IP: 89.98.*.*






PostPosted: Sat Jul 21, 2007 9:00 pm    Post subject:
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Hey,

I got the same "downloader" virus just a minute ago and was also unable to acces. Norton Showed that it deleted a virus but from reading here I'd rather be sure its gone.. since ive been gone for a coupel of weeks on vacation (I just got home -__-) I havent updated my virus definitions yet and I am a IE7 user.

The website that I got it from was world-of-sins.net and I got it through Active-X, the forum was spammed with porn adverts a like 1-2 weeks ago so it may be something to mention seeing I got this virus after that >_>...

So thx if you reply on this ^^

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