I'm using a two month old Samsung laptop with Windows 8. I use Google Chrome 99% of the time with the AdBlock extension. My laptop came with a Norton trial and I installed Malwarebytes the day I bought it. I haven't had any viruses or malware until this past week.
Two days ago, I updated and ran Malwarebytes for the first time since September 26. The quick scan picked up a Zbot trojan (Trojan.PWS.Zbot.AI) in my recycle bin from a file called AudioTest.exe. I do not know where this file came from. I checked my downloads folder and it wasn't in there, nor was it in my Chrome download history.
My laptop has a history of randomly disconnecting from the wifi - this has happened since I bought it - and I recently noticed the mouse cursor would occasionally randomly jerk to the other side of the screen while I was using it. I don't know if those are symptoms of a trojan virus, because the cursor jerk sometimes happens to me if there is a piece of dirt on the laser thing (sorry, don't know the proper word for it). However, I did click on a link that a close friend sent (while we were instant messaging) that was for an online TV show that we were just talking about. I know that this wasn't a hacking attempt because nothing strange has ever happened before or since while IMing with my friend. Anyway, a pop-up appeared right after I clicked on the website, which I thought was strange since I have AdBlock. I closed the pop-up immediately before it could load properly. I closed the website too and did not watch the video. I didn't notice any strange occurrences after that happened. That was on September 27, the day after my last Malwarebytes scan.
Malwarebytes quarantined the trojan and I removed it. I then ran two quick scans, a full scan, and a scan with RogueKiller. The MWB scans came back clean and the RK scan only showed two registry errors. Norton expired two days ago, so I downloaded AVG this evening and ran a scan, which also came back clean.
I was hoping this trojan was just a false positive. It seems too good to be true that a Zbot trojan could be removed in a few minutes. I am worried that there are still traces of it on my computer. I'm willing to do other scans and also a full reformat if I need to (I am really scared of viruses and the possibility of hackers stealing my family's online banking information!).
Thank you in advance.
Edited by ireallyhateviruses, 07 October 2013 - 11:23 PM.