Optimal Software s.r.o. - 5% Detection Rate *
Did you just run into a download or a file on your computer that is digitally signed by Optimal Software s.r.o.? Some of the security products refers to the detected files as W32.HfsAdware.3005 and Program.Unwanted.792. The detection rate for the Optimal Software s.r.o. files collected here is 5%. Please read on for more details.
You will probably notice Optimal Software s.r.o. 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 Optimal Software s.r.o. digital signature with the following steps:
- Open Windows Explorer and locate the Optimal Software s.r.o. file
- Right-click the file and select Properties
- Click the Digital Signatures tab
- Click on the View Certificate button
Here's a screenshot of a file signed by Optimal Software s.r.o.:
As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by Optimal Software s.r.o. and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Optimal Software s.r.o., such as the street name, city and country.
COMODO Code Signing CA 2, DigiCert High Assurance Code Signing CA-1 and COMODO RSA Code Signing CA has issued the Optimal Software s.r.o. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
Optimal Software s.r.o. Files
These are the Optimal Software s.r.o. files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 5/54 | _iu14D2N.tmp |
| 1/55 | _iu14D2N.tmp |
| 1/54 | Uninstall_PCSpeedUp.exe |
| 5/56 | PCSUSD.exe |
| 2/57 | PCSUNotifier.exe |
| 3/54 | PCSUSD.exe |
| 5/57 | PCSUNotifier.exe |
| 1/53 | PCSUSD.exe |
| 5/57 | PCSUSD.exe |
| 5/56 | PCSUNotifier.exe |
| 8/57 | speedcheckerservice.exe |
| 3/57 | PCSUNotifier.exe |
| 4/56 | PCSUService.exe |
| 5/53 | PCSUSD.exe |
| 4/57 | PCSUSD.exe |
| 4/56 | speedcheckerservice.exe |
| 13/56 | PCSUUCC.exe |
| 20/68 | PCSUService.exe |
| 7/65 | allhistorycleaner.exe |
| 23/71 | scs_setup_1.0.34.0.exe |
| 0/45 | tap0901.sys |
| 0/57 | SpeedCheckerService.exe |
| 0/49 | WiFiProtLauncher.exe |
| 0/53 | wifiprotservice.exe |
| 0/53 | PCSUService.exe |
Scanner and Detection Names
Here's the detection names for the Optimal Software s.r.o. files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | Optimizer.AH, Generic.280, Generic.0A3, Generic_r.AHP |
| AVware | Trojan.Win32.Generic!BT, PCSpeedUp |
| AegisLab | Optimizer.Gen!c, Troj.Dropper.W32.Agent.lVzu |
| Agnitum | Riskware.Agent! |
| Alibaba | Hoax:Win32/DeceptPCClean.4d1e3c50 |
| Antiy-AVL | HackTool[Hoax]/Win32.DeceptPCClean |
| Baidu-International | PUA.Win32.Speedchecker.C, PUA.Win32.SpeedUpMyPC.80 |
| Bkav | W32.HfsAdware.3005 |
| ByteHero | Trojan.Malware.Obscu.Gen.001 |
| CAT-QuickHeal | Trojan.IGENERIC, Trojan.Speedchecker |
| Comodo | ApplicUnwnt, Application.Win32.Speedchecker.~C |
| Cylance | Unsafe |
| Cyren | W32/Trojan.BXAA-8594 |
| DrWeb | Program.Unwanted.792, Program.Unwanted.12, Program.Unwanted.1053, Program.Unwanted.1395, Program.Unwanted.2275 |
| ESET-NOD32 | a variant of Win32/Speedchecker.B potentially unwanted, a variant of Win32/Speedchecker.C potentially unwanted, a variant of Win32/Speedchecker.E potentially unwanted |
| Endgame | malicious (high confidence) |
| Fortinet | Riskware/Speedchecker, Riskware/DeceptPCClean |
| GData | Win32.Application.Agent.5S974Q |
| Jiangmin | Hoax.DeceptPCClean.cx, Hoax.DeceptPCClean.aas |
| K7AntiVirus | Riskware ( 0040eff71 ), Adware ( 004dd23b1 ), Riskware ( dec000091 ) |
| K7GW | Riskware ( 0040eff71 ), Adware ( 004dd23b1 ), Riskware ( dec000091 ) |
| Kaspersky | Hoax.Win32.DeceptPCClean.p |
| MAX | malware (ai score=99), malware (ai score=95) |
| Malwarebytes | PUP.Optional.PCSpeedUp |
| McAfee | Artemis!7C8C94CB80A9, Artemis!D69DD0A3D759, PCSpeedUp |
| McAfee-GW-Edition | Artemis, PCSpeedUp |
| Microsoft | PUA:Win32/SpeedChecker |
| NANO-Antivirus | Riskware.Win32.Unwanted.deqwxg, Riskware.Win32.OptimizerPro.elffhf |
| Paloalto | generic.ml |
| Panda | PUP/SpeedUpMyPC, PUP/SpeedCheck |
| Rising | Hoax.DeceptPCClean!8.EEF9 (CLOUD) |
| SUPERAntiSpyware | PUP.PCSpeedUp/Variant |
| Sophos | Generic PUA HM (PUA), Generic PUA CB (PUA), Generic PUA BL (PUA) |
| Symantec | PCSpeedUp, PUA.PCSpeedUp, Trojan.Gen.8!cloud |
| Tencent | Trojan.Win32.Qudamah.Gen.5, Trojan.Win32.YY.Gen.18, Win32.Trojan-psw.Deceptpcclean.Tdfl |
| TrendMicro-HouseCall | Suspicious_GEN.F47V0825, Suspicious_GEN.F47V0413, Suspicious_GEN.F47V1020, Suspicious_GEN.F47V0320, Suspicious_GEN.F47V0509, TROJ_GEN.R00EH0CLF17, TROJ_GEN.R002H07DM19 |
| VBA32 | SigAdware.OptimalSoftwaresro |
| VIPRE | Trojan.Win32.Generic!BT, PCSpeedUp (not malicious) |
| Webroot | Pua.Optimal.Software |
| Yandex | Riskware.Agent! |
| ZoneAlarm | Hoax.Win32.DeceptPCClean.p |
* How the Detection Percentage is Calculated
The detection percentage is based on that I have collected 2326 scan results for the Optimal Software s.r.o. files. 124 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 is based on certificates with the following serial numbers:
- 50c21e22fc95cc7effb6e44f30ce0384
- 09da6e35288e3a0431b971129ccf387a
- 7759be5e5acee592af19555b528ce72f
- 064ea4364631c6e156313bc99414782d
- 1fa0d67d60ca1e747e6fbd496e484b0d
- 38daa78a576dabbdcd8f1241733fe17f