GreyGray - 27% Detection Rate *
Did you just run into a download or a file on your computer that has a digital signature from GreyGray? Some of the security products refers to the detected files as Adware.SwiftBrowse.CH and MalSign.GreyGray. The detection rate for the GreyGray files collected here is 27%. Please read on for more details.
You will typically see GreyGray 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 GreyGray digital signature with the following steps:
- Open up Windows Explorer and locate the GreyGray file
- Right-click on the file and select Properties
- Click the Digital Signatures tab
- Click on the View Certificate button
Here is a screencap of a file signed by GreyGray:
As you can see in the screenshot above, Windows reports that "This digital signature is OK". This implies that the file has been published by GreyGray and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine 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 GreyGray, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the GreyGray certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
GreyGray Files
These are the GreyGray files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 4/49 | GreyGray.BrowserFilter.Helper.dll |
| 1/52 | {f551efce-3692-4ed5-8201-c1c7dbef1744}gw64.sys |
| 1/50 | wstlib64.sys |
| 25/55 | maintainer.exe |
| 6/47 | Setup[1].exe |
| 5/49 | updategreygray.exe |
| 8/50 | updateGreyGray.exe |
| 10/49 | updateGreyGray.exe |
| 20/50 | GreyGrayBHO.dll |
| 5/52 | {f551efce-3692-4ed5-8201-c1c7dbef1744}gw.sys |
| 32/57 | {b97ce8fa-0be1-4b73-8ac6-5353529f8179}w64.sys |
| 34/57 | {cea0b68f-aa62-4ba6-8bc7-29e00848f6c8}w64.sys |
| 32/56 | {f551efce-3692-4ed5-8201-c1c7dbef1744}w64.sys |
Scanner and Detection Names
Here's the detection names for the GreyGray files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| ALYac | Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| AVG | MalSign.GreyGray, GreyGray |
| AVware | Yontoo (fs), Trojan.Win32.Generic!BT |
| Ad-Aware | Gen:Variant.Adware.SwiftBrowse.1, Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| Agnitum | PUA.Agent!, Riskware.Agent!, Trojan.BPlug! |
| AhnLab-V3 | Adware/Win32.SwiftBrowse, Trojan/Win32.Zapchast, Win-PUP/BrowseFox.Gen, Trojan/Win64.SwiftBrowse |
| Antiy-AVL | GrayWare[AdWare:not-a-virus]/Win32.LinkSwift, GrayWare[AdWare:not-a-virus]/Win32.Kranet, AdWare/Win32.WebCake.gen, GrayWare[AdWare:not-a-virus]/Win32.Agent, GrayWare[NetTool:not-a-virus]/Win64.NetFilter.a, Trojan/Win32.TSGeneric |
| Arcabit | Adware.NetFilter.E |
| Avast | Win32:Adware-BYZ [PUP], Win32:BrowseFox-ED [PUP] |
| Avira | ADWARE/BrowseFox.Gen7 |
| Baidu-International | Adware.Win32.BrowseFox.grey, Adware.Win32.BrowseFox.G, Adware.Win32.Agent.AJ, Hacktool.Win32.NetFilter.bA |
| BitDefender | Gen:Variant.Adware.SwiftBrowse.1, Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| Bkav | W64.HfsAdware.E1EA, W64.HfsAdware.2DEE |
| ClamAV | Win.Adware.Agent-22685, Win.Adware.Swiftbrowse-497, Win.Adware.Swiftbrowse-75 |
| Comodo | Application.Win32.Altbrowse.AK, UnclassifiedMalware |
| Cyren | W64/A-59c9c70a!Eldorado, W64/A-e967bae2!Eldorado |
| DrWeb | Trojan.BPlug.281, Adware.Searcher.2574, Adware.Plugin.133, Trojan.BPlug.10, Trojan.BPlug.28, Trojan.Yontoo.1734 |
| ESET-NOD32 | Win32/BrowseFox.V, Win32/BrowseFox.C, a variant of Win32/BrowseFox.G, a variant of Win32/BrowseFox.F, Win32/RiskWare.NetFilter.A, a variant of Win64/NetFilter.A potentially unsafe, Win64/Riskware.NetFilter.A |
| Emsisoft | Gen:Variant.Adware.SwiftBrowse.1 (B), Adware.SwiftBrowse.CH (B), Adware.NetFilter.E (B) |
| F-Prot | W32/Yotoon.A.gen!Eldorado, W64/A-59c9c70a!Eldorado, W64/A-e967bae2!Eldorado |
| F-Secure | Gen:Variant.Adware.SwiftBrowse.1, Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| Fortinet | Riskware/BrowseFox, Adware/Agent, Riskware/NetFilter |
| GData | Gen:Variant.Adware.SwiftBrowse.1, Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| Ikarus | not-a-virus:AdWare.Win32.Agent |
| Jiangmin | AdWare/LinkSwift.f, Adware/Agent.izz, AdWare/Yotoon.m |
| K7AntiVirus | Trojan ( 004af26b1 ), Unwanted-Program ( 00454f261 ), Adware ( 0040f9f21 ) |
| K7GW | Trojan ( 004af26b1 ), Unwanted-Program ( 00454f261 ), Adware ( 0040f9f21 ) |
| Kaspersky | not-a-virus:AdWare.Win32.Yotoon.bfm, not-a-virus:AdWare.Win32.Agent.ahbx |
| Kingsoft | Win32.Troj.Generic.a.(kcloud), Win32.Troj.Agent.ah.(kcloud) |
| Malwarebytes | PUP.Optional.Greygray.A, PUP.Optional.GreyGray.A |
| McAfee | Artemis!48CDB8D668B1, Artemis!8376AD1238D7, Artemis!2FDB0037A45F, Artemis!933CAF9817B0, Artemis!83F933EB7100 |
| McAfee-GW-Edition | Artemis!48CDB8D668B1, Artemis!8376AD1238D7, Artemis!2FDB0037A45F, BehavesLike.Win64.PUPAmonetize.ph, Artemis!PUP |
| MicroWorld-eScan | Gen:Variant.Adware.SwiftBrowse.1, Adware.SwiftBrowse.CH, Adware.NetFilter.E |
| NANO-Antivirus | Riskware.Win32.LinkSwift.ctlglk, Riskware.Win32.Kranet.dgiwfc, Riskware.Win32.Agent.cuenda, Riskware.Win64.NetFilter.dknvuw, Riskware.Win64.NetFilter.dlzjey, Trojan.Win64.BPlug.dhxwgz |
| Panda | PUP/GreyGray |
| Qihoo-360 | Win32/Virus.Adware.708 |
| Rising | PE:Trojan.Win32.Generic.16C5B295!382055061 |
| SUPERAntiSpyware | Adware.BrowseFox/Variant, Adware.NetFilter/Variant |
| Sophos | GreyGray |
| Symantec | Trojan.Gen.2, Yontoo.C, PUA.Yontoo.C |
| Tencent | Win32.Trojan.Falsesign.Eem, Win32.Trojan.Falsesign.Hqvc, Win32.Trojan.Falsesign.Eckn |
| TrendMicro | HS_BROWSEFOX.SM, TROJ_GEN.R0C1C0OAP15 |
| TrendMicro-HouseCall | TROJ_GEN.F47V1028, TROJ_GEN.F47V0125, TROJ_GEN.F47V0226, TROJ_GEN.F47V0301, TROJ_GEN.F47V0502, HS_BROWSEFOX.SM, TROJ_GEN.R0C1C0OAP15 |
| VBA32 | AdWare.Kranet |
| VIPRE | Yontoo (fs), Adware.Agent, Trojan.Win32.Generic!BT |
| Zillya | Adware.Kranet.Win32.476, Adware.Yotoon.Win64.14 |
| nProtect | Adware.SwiftBrowse.CH, Trojan-Clicker/W32.SwiftBrowse.61112 |
* How the Detection Percentage is Calculated
The detection percentage is based on the fact that I've collected 673 scan results for the GreyGray files. 183 of these scan reports came up with some sort of detection. You can review the full details of the scan reports by examining the files listed above.
Analysis Details
The analysis has been done on certificates with the following serial numbers:
- 23ff62a16c638b371a4ab98a8f876e8b