Question

Sonic Wall Log

Asked by: LionelR2D2

Checking the Sonic Wall log, it is repeatedly displaying "Gateway Anti-Virus Alert: UPX packed executable file blocked."  The source is 69.28.155.xx, 80, WAN, cds21.lga.llnw.net.  Destination is various IP addresses/PC's on our network.

I've never seen anything like this before.  What is the best way to get more information and, if neccessary, address the issue further?

Thank you.

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Asked On
2009-06-16 at 08:27:28ID24495942
Topics

Network Software Firewalls

,

Enterprise Firewalls

Participating Experts
3
Points
500
Comments
5

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Answers

 

by: danf0xPosted on 2009-06-16 at 09:38:16ID: 24639741

do you have viewpoint?  It is the logging server provided by sonicwall that will manage the logs.  You need to point your logging to some type of syslog server so you can break down what is actually going on.
  There are many antivirus vendors that block UPX files as false positives.

 

by: ccomleyPosted on 2009-06-17 at 02:03:26ID: 24646227


Are you using NAT? If so is anyone on your network complaining taht a web page isn't working (say)?  The infected (presuming it's real) packet must be coming in in response to a request for something (e.g. web page) by the workstations. (The port-80 bit suggests it's a web page too.)

If as danfox suggests you have Viewpoint, see who is trying to access the website in question.

If the destinations are public IP addresses, then it could just be a worm trying all IP addresses in a range in turn.

If you think it's a real issue, you could always block that Ip address in the access rules> BUT remember that if the problem has been reported in the firewall log then the firewall has ALREADY dealt with it!

 

by: LionelR2D2Posted on 2009-06-17 at 05:53:45ID: 24647600

Thank you both.  Turns out llnw.net is Limelightlight networks.  Apparently a UPX file is attempting to be downloaded that contains an executable.  Still can't tell if it is malware or not, though.

Sorry, Sonic Wall Viewpoint is new to me.  I see it under the Log tab.  I see two IP adresses listed here; neither one is mine.  I assume Viewpoint is sending the data to these machines?  Is the file called "syslog" and Is there a default location where it resides?

Thank you.

 

by: danf0xPosted on 2009-06-17 at 06:03:48ID: 24647669

The forwarded information in a log is considered the syslog.  The IP's you see are the machines that are receiving the log but will need something to make the logs readable.  Viewpoint is software you can download from the sonicwall site.
http://www.sonicwall.com/us/support/3340.html
When you click on download you will be asked to login to your "mysonicwall" area and you have to have your maintenance contract still going.
I don't know anything about Limelight so I can't tell you what they are trying to transmit.

 

by: craig505Posted on 2010-06-18 at 12:36:12ID: 33023933

File sharing networks such as LimeLight (limeWire, etc) are often exploited to transmit spyware, trojans, and viruses.

If you weren't downloading a program at the time this happened, odds are it is malware.

Our SonicWall rejects these files as part and parcel of the Gateway Anti-virus protection.

Get yourself some good anti-virus/anti-spyware protection. We use Trend. Trend has a free scanner (housecall) at antivirus.com. Scan every machine on your network. Odds are you'll find that you are infected. Microsoft Security Essentials can help protect you for free once you've gotten cleaned up. For Server boxes, you'll need something like ClamAV paired with the Housecall scanner for weekly scans.

As in everything, you get what you pay for, and are culpable for what you turn a blind eye towards.

20120131-EE-VQP-002

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