hxxps://www.youtube.com/watch?v=csHGxDqf_wQ
Intermission - WiseVector StopX 2.73 Test vs Fresh Malware Samples Part 2
League of Antivirus
hxxps://www.youtube.com/watch?v=vTnZSu51-G0&t=0s
Intermission - WiseVector StopX 2.73 Test vs Fresh Malware Samples Part 1
Thanks the author for the testing, any testing of WVSX will help us to improve.
First of all, I don't think these are fresh malware samples, as I understand fresh malware samples should appear at least within one month, preferably not present in Virustotal or at least less than 30 detections, or less than 20 in VT. According to the video we can tell that these samples probably come from Virussign or Virusshare, because Virussign often has many normal files that are infected with Floxif virus, Virusshare are full of PUPs. Samples from Virussign are definitely not fresh samples.
In the end of the video, most of the infected files are files infected by Floxif virus and PUPs, with a few worms we think they are the same file and one Quasar malware.
1. We are confident that our behavior detection is able to block Floxif virus. In the author's test WVSX has blocked one, please see screenshot below. We have tested several files infected by Floxif virus by ourselves and we can sure WVSX is able to block them all. If there are testers willing to test Floxif samples with WVSX, we would appreciate it. If WVSX failed to block any Floxif sample, please post it here. Testers can disconnect from the network to prove we haven't updated anything。
2. We observed that WVSX's own files are also infected by Floxif virus, which should not be possible because our kernel drivers prevent other programs from writing to WVSX's installation folder. This should be result in running a large number of Floxif virus at the same time.
3. For PUPs, if we do not observe any advertising or spying behavior in our environment, we will not add the detection. For example, there are several mail.ru PUPs in the vlogger's test, we have analyzed many samples developed by mail.ru and didn't observe advertising behavior in our environment. Also, as far as we know, mail.ru has a large number of users in Russia, so we would be quite cautious to flag these files.
4. For older malware samples like Quasar, they may not exhibit malicious behavior if their CC server is dead.
We think that the reason for these infections may be due to running a large number of samples at the same time, and WVSX have some problems when faced stress test. We will do more stress tests ourselves in the future, but you should know that it is impossible for a normal user to run a large number of malicious programs at once.