Home » Kerio User Forums » Kerio Control » Shady traffic in Connections log (From a PC that had a virus removed yesterday, still creates this traffic)

Messages: 10
Karma: 0
Send a private message to this user
Hi, I need some help with this problem.

We have been being blocked by some spam blacklists recently and checking Kerio Control logs we found out that one internal IP was generating some shady traffic, from different sequential ports to private IPs outside of our range.
Yesterday we checked the PC that had that IP and found one virus, I can't remember the virus name but the filename was irclassp.dll (of which we couldn't find any info).
The thing is that the traffic didn't stop today, although the computer is supposedly clean, according to two antivirus (Norton and Sophos).
I'm attaching a screenshot, if you have any idea of what could be.

Some things we noticed:

  • The origin port is never the same, but they are not random. Rather, it looks like it's incremental.
  • The destination port is always 161.
  • The destination IP address (192.168.1.x) is incremental, but it doesn't match our IP range (10.25.x.x). It looks like it's scanning the most common network mask?
  • Connection duration is 60-61 seconds.
  • These connections start in groups of eight, every 62 seconds.

P.S.: Although this internal traffic still exists, we haven't been blocked by spam lists yet today. Smile

  • Attachment: kerio.png
    (Size: 135.21KB, Downloaded 190 times)

[Updated on: Fri, 10 October 2014 16:40]

Previous Topic: VPN client run script
Next Topic: Traffic sniffing (for debug and troubleshooting purposes)
Goto Forum:

Kerio discussion forums are intended for open communication between forum members and may contain information and material posted by members which may be useful in learning about Kerio products. The discussion forums are not intended to provide technical support for any specific product. Any information implied or expressed in the discussion forums is that of the posting member. Kerio is in no way responsible for the information posted in the forums, or its accuracy. Kerio employees may participate in the discussions, but their postings do not represent an offical position of the company on any issues raised or discussed. Kerio reserves the right to monitor and maintain the forums to promote free and accurate exchange of information.

Current Time: Mon Nov 19 08:15:37 CET 2018

Total time taken to generate the page: 0.77543 seconds
.:: Contact :: Home ::.
Powered by: FUDforum 3.0.4.