??? - 16% Detection Rate *
Did you just stumble upon a download or a file on your computer that is digitally signed by ???? Some of the security products refers to the detected files as Adware ( 004c68cf1 ) and not-a-virus:AdWare.Win32.FileFinder.gen. The detection rate for the ??? files collected here is 16%. Please read on for more details.
You will typically see ??? when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:
You can view the additional details from the ??? digital signature with the following steps:
- Open up Windows Explorer and locate the ??? file
- Right-click on the file and select Properties
- Click on the Digital Signatures tab
- Click the View Certificate button
Here's a screenshot of a file that has been signed by ???:
As you can see in the screengrab above, Windows reports that "This digital signature is OK". This implies that the file has been published by ??? and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also view the address for ???, such as the street name, city and country.
WoSign Class 2 Code Signing CA has issued the ??? certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
??? Files
These are the ??? files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 14/65 | YiwanHelper.exe |
| 15/65 | yx_dts.exe |
| 0/55 | setup_962_10043.exe |
Scanner and Detection Names
Here is the detection names for the ??? files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | Win32:Malware-gen |
| Avast | Win32:Malware-gen |
| Avira | TR/Agent.ujfwz |
| CAT-QuickHeal | Trojan.IGENERIC, Application.Agent.ZZ5 |
| Comodo | Malware@#2s7wjxyjiauox, Application.Win32.Wews87.B@77g5mh |
| ESET-NOD32 | a variant of Win32/Yiwanzhushou.A potentially unwanted, a variant of Win32/Wews87.A potentially unwanted |
| Endgame | malicious (moderate confidence) |
| F-Secure | Trojan.TR/Agent.ujfwz |
| Fortinet | W32/Generic_PUA_JE.A |
| GData | Win32.Trojan.Agent.Q8BO33 |
| Ikarus | PUA.Yiwanzhushou |
| K7AntiVirus | Adware ( 004feebc1 ), Adware ( 004c68cf1 ) |
| K7GW | Adware ( 004feebc1 ), Adware ( 004c68cf1 ) |
| Kaspersky | not-a-virus:AdWare.Win32.FileFinder.gen |
| McAfee | Artemis!6B47A162EC00 |
| NANO-Antivirus | Riskware.Win32.Wews87.enkadq |
| Qihoo-360 | Win32/Virus.Adware.16b |
| Rising | Malware.Undefined!8.C (CLOUD) |
| SentinelOne | DFI - Suspicious PE |
| Sophos | Generic PUA JE (PUA), Generic PUA LG (PUA) |
| VBA32 | BScope.Adware.FileFinder |
| Yandex | PUA.Wews87! |
| ZoneAlarm | not-a-virus:AdWare.Win32.FileFinder.gen |
* How the Detection Percentage is Calculated
The detection percentage is based on the fact that I've gathered 185 scan results for the ??? files. 29 of these scan reports came up with some sort of detection. You can view the full details of the scan results by examining the files listed above.
Analysis Details
The analysis has been done on certificates with the following serial numbers:
- 42269f681cc6c208f41252206c49d2f0
- 6d7c0de2731244c31f2573bb347bffc6
- 5540cbfdb94a7fd37d277a510418958d