Hello all, It's my first post here but I do come here to read every now and then when I need it.
But today I can't seem to understand what's happening:
I am trying to fix a client's PC, he brought it to me because his AV expired, it got infected, he bought a copy of Kaspersky AV 2010 hoping a scan would fix everything, but Kaspersky does not install correctly.
Basically what happens is that after the restart the AV tries to start but Windows XP (Home) reports that an error occurred and Kaspersky must be closed; after a while a windows pops up asking me to activate Kaspersky or do it later but I can't type in it because as soon as it pops up an error window pops up over it and whatever I choose the windows gets closed.
Uninstalls are successful.
Intenet access is affected as in I installed Malwarebytes and SAS but I had to manually update them, trying a auto update will stall the applications and they need to be closed ( the progress bar does not move an inch).
BUT, Updates are fine in Safe mode
Trying to go into IE7 Tools>Internet Options>connections will stall the browser too, although doing the same in FF is ok.
So here's what I did:
Updated to SP3 and from IE6 to IE7 (I still was not sure the PC was infected, the guy said another guy he really did not trust too much tried to fix it before me and possibly ruined something; in fact I found Hijackthis on the desktop)
Ran Malwarebytes, it cleaned up Trojan.Vundo and Trojan.Agent (not sure about this second one, working on it late last night
SAS found only cookies.
Spybot found nothing
Vundofix found nothing
I also ran Combofix and the only thing I could understand was that at the end of the huge log the GMER based Rootkit Revealer found something malicious on the MBR and that mbr.exe -f was needed to fix it (didn't do it expecially since I did not know if Combofix did perform it on his own.
Panda Anti-Rootkit found nothing
AVG Anti-Rootkit found nothing
Trendmicro Housecall (stand-alone) gets stuck at 95% of the file verification
Installed Eset NOD32 4 free, oddly it did update automatically in normal mode and now running a scan, will update with results.
Anybody has got any idea? Anything that I could try?
Thanks in advance.
P.s.: BTW I have been honest with my client and told him that since he has backups, a format and reinstall would have been quicker safer and cheaper, but he says he can't be bothered reinstalling the applications.