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Browser failes, ping and nslookup work okay

Posted on 2008-10-03
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Last Modified: 2012-05-05
Desktop with XP SP2, has been working for many months.  No known recent changes, but IE stopped working, giving an "Internet Explorer cannot display the web page".
Test pinging to outside DNS, which works okay.  Pinging local default gateway works okay.  Nslookup to various places provides IP addresses.
Brought several antivirus packages in via USB, found and removed some trojans.  System shows as clean now.
Brought Firefix in from USB, same symptoms -- fails to connect.
With either browser, typing IP addresses connectsw to page, but images not downloaded.
Brought winsockxpfix from USB, ran, rebooted.  Same symptoms remain.

Anyone seen this before?  Probably as a result of trojan infection. (Trojan.FakeAlert, Trojan.BHO, Trojan. zlob).
Thanks,

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Question by:sstone55423
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by:myhc
myhc earned 100 total points
ID: 22635384
have you checked your hosts file?
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by:sstone55423
ID: 22635407
Yes, I did.  the hosts file looks normal.
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by:IndiGenus
IndiGenus earned 250 total points
ID: 22635499
Hi,

Maybe you're still infected, or there is a bad LSP in there. Run and post a HijackThis log, maybe that will help to diagnose.

http://www.trendsecure.com/portal/en-US/_download/HJTInstall.exe

Click on "Do a system scan and save a log file" button. Post the text from the log file. Do not have HJT fix anything at this point.

Please do not post the log into the comment window. Use "Attach File" under the comment window to post the log.
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sstone55423 earned 0 total points
ID: 22635848
I had run hijackthis, and did not find anything.  What I ended up doing is restoring back to a restore point a few days back before the issue started.  I then did complete AV and anti-spyware scans again, and did system restore point save.
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Expert Comment

by:tdthai
ID: 22641236
I had exactly the same problems as you described, and not just 1 but twice. The first time is when I change the proxy setting for my ISA server. Some of the config files are "slow" to the get updates, it make the server unable to get to internet. To solve this problem, just wait.
Second times, it happened on a laptop joining domain to test the Firewall setting. Same problem. Can ping, can nslookup, can telnet port 80, but cannot open the website using IE. I cleared all the cached files, histories, temp internet file, even reboot the router, reboot the PC and wait until next day.
And everything works as normal again.
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