Archive for the ‘Exploits’ Category

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Malware in a rar

October 28th, 2009

The following site (Russian language), igra.newvksoft.org.ua, downloads a rar file onto your computer.

russ1

If you extract the file you will get this:

russ2

file.exe is malware

russ3

It’s not often I see malware coming through a rar file.

Did you know?  The rar file compression format was developed by a Russian software engineer, Eugene Roshal.

It probably is just a coincidence that this file also targets Russian users.

Jerome

Malware ID: 8a0a4749ddd176c08f4c58d8a52a866c.zip

Warning: all links contained in this post may infect your computer!

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miekiemoes has a secret admirer

October 27th, 2009

The following Czech site (otylkaaotesanek.cz ) contains an exploit:

mikie1

In Google Chrome you will see a PDF automatically downloaded (thankfully I did not have Adobe reader installed on this machine)

mikie2

The malware author took the time to credit this PDF to security researcher miekiemoes. That sounds pretty similar to a Dancho Danchev fan club ;-)

mikie

mikie3

This is a malicious PDF:

mikie4

Only one AV vendor from Virus Total (Sophos) detected this threat:

mikie5

Opening the PDF with a vulnerable version of Adobe Reader will launch the following payload:

http://dom2cn.cn/13b/load.php?spl=pdf_exp
http://jzion.cn/etc242342534252435223/1.php
http://jzion.cn/etc242342534252435223/soft14.exe

dom2cn.cn/13b/load.php?spl=pdf_exp
jzion.cn/etc242342534252435223/1.php
jzion.cn/etc242342534252435223/soft14.exe

The last file is a Trojan detected by 35% of the AV vendors from Virus Total, at the time of writing.

Jerome Segura

Malware ID: t1L8XD644LtNd.pdf.zip

Warning: all links contained in this post may infect your computer!

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Ambassadors for education’s site compromised

October 26th, 2009

globalfundforeducation.org has been compromised.

amb

Obfuscated JavaScript:

amb2

A little bit of fiddling around with the JS code allows us to display what it actually does:

code

An iframe:

amb4

Which is also referenced in the main code:

amb3

The final payload seemed to come from soft-siski.com in the form of several executables.

Jerome Segura

Warning: all links contained in this post may infect your computer!

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Site ‘Under construction’ hosts malware

October 23rd, 2009

Our Honeypots caught the following site: dataprovedor.com.

Is this site really under construction? It looks like some kind of web portal.

provedor

Regardless, let’s get to the subject that got us here in the first place: The malware.

In a sub directory called images you can see two files, one is an exe, the other a php which redirects to the exe.

I found it rather smart that the file name for the exe is in the form of DSCXXXXX. For those who own a Sony camera (or possibly other Sony products) this is the default name to which images are saved to.

So, one bonus point for the social engineering trick.

files

The time stamp also indicates that those files have been uploaded recently, to what I think is a hacked server.

The online file checker Jotti reveals that the file may be part of the Banload Trojans family, but is poorly detected at the time of writing:

jotti

Jerome Segura

Malware ID: 2b65626b2442521307d68a53c0b5e6aa.zip

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Spy on your wife, get infected

October 22nd, 2009

Our HoneyPots caught this site spymycomputer.com and one of its products “spy man”

spyman

I decided to take a closer look:

First, as reported by our HoneyPots, the site initiates two drive-bys:

driveby

The drive-by files are not very well detected yet, as shows this Virus Total scan:

http://www.virustotal.com/analisis/e1eb5f2d9df855c9ed33ea76908c79a8e57bef0c505225b3945c910c200bb6e8-1256205382

The source code of spymycomputer.com contains 3 iframes:

url

frantsuz.com was listed by Google: http://google.com/safebrowsing/diagnostic?site=frantsuz.com/

abbcp.cn is already blacklisted by our friend Steven Burn over at hpHosts:

hp

As far as the software itself, “Spy Man” you may want to think about it twice before installing it:

vt2

Key logging programs have always had a bad reputation… Well, the name itself  “Spy Man” sounds a little bit like a Cold War espion character ;-)

Jerome Segura

Malware ID: 8cbe7e2692a5bdaabfc6b2253c7624e7.zip

Malware ID: f00173d0a26085d3333578f2d90e5c64.zip

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‘Welcome to Bulgaria’ site infected…

October 15th, 2009

Our HoneyPots caught this site as being malicious: legal.bg

bulgaria

They also gave us the drive-by download:

git77.biz/myy/dateoiou1.exe

But I wanted to know more on how this happened…

The Bulgarian site contains obfuscated Javascript:

javaobfuscated

And a particular long piece of unicode with a lot of ‘V’s in it:

gibber

the new variable uses the “split” function to clear the ‘V’s out of the way.

Another variable is setup as a string:

definevar

Then a ‘for loop’ function will go through each single character from the long variable without the ‘V’s:

for

Finally the document.write method will add the final piece to the puzzle, which is an iframe, but making sure it is obfuscated. The obfuscation part is defined in the long piece of unicode as “opacity=0″ (more on that later)

write1
write2

So, how did we deobfuscate this?

Well, we commented out the blue code above… and used our own document.write

sol

It basically takes the variable containing the iframe and writes it with a space between each character. That way, we can print it without it being hidden by the opacity argument. This is what it looks like, in clear text :-)

voli

So what about those iframes that are 0 in width and in height? Too easy to detect… Yes, probably. This one is “in your face” (width=”480″ height=”60″) and yet totally invisible.

The final payload is an executable detected on VirusTotal as:

http://www.virustotal.com/analisis/3b4f59eec0bc51dc40c787fef5e167c45f9d595e76712707f825cd66db845a15-1255539380

Thanks to Newaz Rafiq for his help on the deobfuscation part.

Jerome Segura

Malware ID: 4e1741d0a991ada20b9a788f2074f0ba.zip

Updated to add: This seems to be using the Fragus exploit kit. More info here from MalwareDomainList. (Thanks to MalwareScene)


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Spa site gets `rootkited`

September 15th, 2009

I came across this spa’s website today, which is hosting a rootkit.

The full URL is: www.landmarkspa.com/pdf/wq.exe

root1

The file itself came up as clean as soap on VirusTotal:

VT0

Upon running it though, the file immediately deleted itself and created a Service.

rootkit

That service, or rootkit, is detected by a few AV Vendors:

vtrootkit

Playing with the new (free) version of McAfee FileInsight:

padding

The screenshot below shows the rootkit name and… a lot of padding… an easy way to bypass signature detection.

paddingzoom

Jerome Segura

Malware ID: f535708ce6190267e16ee8e22d5d4917.zip

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Imageshack.us typo pushes malware

September 4th, 2009

lmageshack.us (an ‘L’ in place of an ‘i’):

robt

redirects you to a compromised site hosting malware:

mal

the exact path is: www.powerpress.ch/images/img327.scr

VirusTotal analysis:

vt

Jerome Segura

Malware ID: e766415f02909b548f64071fe904bcb6.zip

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Angelina and Zango cash

September 4th, 2009

I came across the following site today: angelinajmovies.cn

If you browse the site you immediately get a file:

anjel1

which VirusTotal detects as:

vt1

If you refresh the page you now get this second file (sorry I used Firefox here, but you get the same result in IE):

anjel2

which VirusTotal detects as:

vt2

And if you refresh the page angelinajmovies.cn for a third time you get:

anjel3

Wait, let’s zoom in a little bit:

anjel4

Yes, you see it right, Zango it is.

Dreamcatcher player, sorry DreamMediaPlayer or whatever.

The landing page reminds me so much of the fake codec pages. I bet they might even have used the same template.

Bad on all fronts!

Jerome Segura

Malware ID: 67e252ee84a6b5d0e2706ccc3e36a106.zip

Malware ID: bea4676cddd48770b56c54db8b07f370.zip

Malware ID: c115d8251fe12d92567e55cad1d379e9.zip

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French site serves malware

August 28th, 2009

I noticed a French site hit our traps… As a Frenchman I thought I’d check. ;-)

agencedelamairie.fr is hosting malware (agencedelamairie.fr/images/bouton/Explorer8.exe)

It is a realtor site.. although not very functional at the moment.

f1

The file detection on Virus Total:

f2

The site’s owner has been contacted.

Jerome Segura

Malware ID: d481046cb2f05e656100556fabbaf4e7.zip

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