Just got home a few minutes ago and I was thinking along the same lines, but not so much
as Malware as I deal with Systems Security all the time.
Several things I was thinking of:
what with the speed you quoted, you appear to be using DSL.
1) log into your DSL modem and make sure that the DNS entries have not been HiJacked by
a DNS Changer.
You mentioned OpenDNS before, so I assume you are a regular user with an OpenDNS Account?
If so Then
2) make sure that the OpenDNS entries are entered into the DSL Modem DNS fields.
208.67.220.220
208.67.222.222
3) make sure that your DSL modem has the latest firmware to plug and security holes as
there are a number of them which have been found over the past year.
4) change the password to log into your DSL modem to a really strong password. Maximum
length it'll allow you plus Alpha numeric and upper & lower characters. If it'll allow you, use
other characters too. Never use any personal information or anything else which can allow
a dictionary attack to work.
5) Same thing goes for any routers you have on your network as you want to avoid any
vulnerabilities and don't use the same password twice.
I keep my usernames and passwords in a text file which I keep backed up on a flash drive
and on my system so I don't have to worry about losing any of them.
After you check your DSL modem and your routers, you will want to check each system
on your network starting with the ones which generally are on most of the time. You'll
want to check them for any infections and for any DNS Changers. It's possible that there
could be a rogue DNS on your network causing the problems you've been having.
Here are a couple of tools you can use to check each of your systems.
Kaspersky Rescue Disk 10 - This is an ISO Disk image, you can either use it to make a
Bootable CD or Flash drive. You might want to make more than one bootable disk or Flash
drive to check your systems quicker.
.
Including a utility for making a bootable Flash drive.
The only thing I would do differently from the instructions is at the very end where it tells
you to start a scan, first thing I would do is go into the settings and set the heuristics to
Advanced, then I would start the scan.
I have used this tool before and it is very effective. It even detects and removes rootkits.
Once you're done, if it does by any chance find any rootkits, after removal of any parasites
you might want to reboot the system and run another scan with this tool just to be sure it's
not a polymorphic rootkit. Then I would run to clean up
anything else. (The Pro version is well worth the purchase.
My current hardware is:
Modem: ASUS DSL-N66U Firmware 1.0.6.3
Router: ASUS RT-AC66U Firmware 3.0.0.4_374_4561
The modem itself has the best specifications I've been able to find compared to all the old stagnant modems currently on the market and it's not even available yet here in the United States. Had to order it through Amazon UK.
It works better than my old modem, but the firmware still leaves a bit to be desired. Although that is understandable as it's still under development. I tried the current Beta firmware 1.0.6.7 except there were a few problems with it including a persistent memory leak which kept showing up in the logs.
