Question

possible rootkit - sequential ip scan

Asked by: pc-cyt

I have an interesting thing going on...
Wireshark is showing I have about 12 icmp requests being sent every second from one of my servers (win 2008 64bit SBS FE)
The src ip is the lan card in the server, the destination ip keeps incrementing by 1 each scan.

I've tried tcpview, but that doesn't seem to show icmp?
I've tried MS Netmon 3.3, that shows the traffic, but 'unknown' process
Full malware bytes scan is clean
Panada Corporate Scan is clean

Kaspersky AVZ4 (script 2 comes back clean)

I'm thinking either the src ip is spoofed?  or i have a rootkit hiding somewhere

Any one got ideas how to find out which process is generating this traffic?

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Asked On
2009-11-06 at 07:12:31ID24878051
Tags

rootkit

Topics

HijackThis Software

,

Anti-Virus

,

Miscellaneous Security

Participating Experts
4
Points
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Comments
10

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Answers

 

by: MikeHolcombPosted on 2009-11-06 at 07:16:14ID: 25759795

You could use Fport v2.0 (http://www.foundstone.com/us/resources/proddesc/fport.htm) from Foundstone to see which service is conducting the outbound ping based on its source port.

To check for rootkits, I would suggest using the following:

1.  F-Secure's Blacklight (http://www.f-secure.com/en_EMEA/products/technologies/blacklight/) - An extremely effective rootkit detector and removal tool from F-Secure.
2.  Trend Micro's Rootkit Buster (http://www.trendmicro.com/download/rbuster.asp) - Another effective rootkit detector and removal tool from TrendMicro.

Hope these help...

Mike

 

by: pc-cytPosted on 2009-11-06 at 07:17:14ID: 25759805

Hope this helps

 

by: pc-cytPosted on 2009-11-06 at 07:40:32ID: 25760016

Hi Mike,

Results

- Fport
Doesn't seem to like the OS.  I open command prompt with admin priv, but on running the tool it say i need admin privs!

- F-Secure's Blacklight
Shows no hidden processes

- Rootkit Buster
Says it can't run on 64bit OS


I wonder if you have any further ideas?  Maybe i don't have a rookit?  There must be a way to show what is generating the ping traffic....

Kind regards,

 

by: MagicFarmerPosted on 2009-11-06 at 10:11:43ID: 25761484

I would recommend Sophos Anti-RootKit and see if it generates any results the others haven't found.
http://www.sophos.com/products/free-tools/sophos-anti-rootkit.html

Have you checked your startup and services through MS Config? Anything fishy?

 

by: pc-cytPosted on 2009-11-06 at 10:59:49ID: 25761971

I rebooted the server, watched it for 30mins and problem not returned!  How bizarre.  Maybe buggy software? donno.
Will watch over weekend and next week to see what happens

Thanks for the help

 

by: optomaPosted on 2009-11-06 at 16:33:24ID: 25764346

Dunno if this will shed any light on it but the address range is belonging to
Level 3 Communications, Inc

 

by: pc-cytPosted on 2009-11-09 at 08:07:38ID: 25777129

For those interested, here is a screenshot showing the bandwidth usage.  Crazy!
You can see I rebooted the server around 17:52.  The bad ICMP data disappeared.  I think i cam,e back sometime after 7pm.  I need to go back to site and find out for sure.

I'm still looking for a way to show which process is generating this ICMP traffic - Any more ideas?

 

by: pc-cytPosted on 2009-11-09 at 08:09:51ID: 25777157

Here is another IO Graph.   You can clearly see when the server got rebooted!

 

by: ee_autoPosted on 2009-12-10 at 01:25:40ID: 26016249

Question PAQ'd, 500 points not refunded, and stored in the solution database.

20120131-EE-VQP-002

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