Online scanner results discrepancy

Have just accidentally visited a website injected with malware, the on-sccess scanner detected the installed files and removed them, but after uploaded to Virustotal and see that the same version cannot dectect the renamed files. What could possibly cause this discrepancy? As from the displayed update time thay should be using same engine and updated sigs (Dr.web 5.0.0.12182).

http://www.host-images.com/u/files/4uzjiropfzofy3qgjvlp.jpg


http://www.host-images.com/u/files/3h0ybqfxcee1und8v61c.jpg

 

They are using commandline scanners which may not have the same options enabled as the desktop scanner (with regards to scan settings/heuristics)

 

what about http://online.drweb.com?

 

Checking: extext4499459t.exe.7B0391B3
Engine version: 5.0.0.12182
Total virus-finding records: 553060
File size: 10.50 KB
File MD5: deaa687b95335e4db2970637805e5338

extext4499459t.exe.7B0391B3 infected with Trojan.DownLoader.origin



Checking: 4467183test.dll.320A1743
Engine version: 5.0.0.12182
Total virus-finding records: 553060
File size: 44.50 KB
File MD5: 5625b5e70c6a5fb3fe51fb74389fb6c4

4467183test.dll.320A1743 infected with Trojan.AVKill.origin

 

As for another sample, the virustotal with updated sig but didnt detect and it doesnt look like is heuristic detection (sample sent to http://vms.drweb.com/sendvirus on 22/5)

Is like something at virustotal causing this discrepancy.

~VirusTotal screenshot removed per Policy.~

 

That's why tests based on Virus Total results are inaccurate and unfair to AV Vendors.
VT uses command line Linux scanners.