LemurLeap - 8% Detection Rate *
Did you just stumble upon a download or a file on your computer that has a digital signature from LemurLeap? Some of the security products refers to the detected files as Yontoo (fs) and PUP.Optional.LemurLeap.A. The detection rate for the LemurLeap files collected here is 8%. Please read on for more details.
You will typically notice LemurLeap when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screencap shows:
You can view the additional details from the LemurLeap digital signature with the following steps:
- Open up Windows Explorer and locate the LemurLeap file
- Right-click on the file and select Properties
- Click on the Digital Signatures tab
- Click the View Certificate button
Here is a screengrab of a file digitally signed by LemurLeap:
As you can see in the screengrab above, the Windows OS states that "This digital signature is OK". This means that the file has been published by LemurLeap 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 see the address for LemurLeap, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the LemurLeap certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
LemurLeap Files
The following are the LemurLeap files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/50 | wstlib.sys |
| 3/48 | updateLemurLeap.exe |
| 4/48 | LemurLeapbho.dll |
| 6/48 | LemurLeapbho.dll |
| 3/48 | LemurLeapbho.dll |
| 6/48 | updateLemurLeap.exe |
| 4/48 | LemurLeap_sm.exe |
| 5/48 | LemurLeap.Common.dll |
| 4/46 | LemurLeapSetup.exe |
Scanner and Detection Names
Here is the detection names for the LemurLeap files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AhnLab-V3 | Adware/Win32.Downloader |
| DrWeb | Adware.Plugin.100 |
| ESET-NOD32 | probably a variant of Win32/BrowseFox.A, a variant of MSIL/BrowseFox.A |
| Kingsoft | Win32.Troj.Generic.a.(kcloud) |
| Malwarebytes | PUP.Optional.LemurLeap.A |
| SUPERAntiSpyware | Trojan.Agent/Gen-BHO |
| Sophos | LemurLeap |
| TrendMicro-HouseCall | TROJ_GEN.F47V1003, TROJ_GEN.F47V1004, TROJ_GEN.F47V0911, TROJ_GEN.F47V0929, TROJ_GEN.F47V0904 |
| VIPRE | Yontoo (fs), Trojan.Win32.Generic!BT |
* How the Detection Percentage is Calculated
The detection percentage is based on that I've gathered 432 scan reports for the LemurLeap files. 36 of these scan reports came up with some sort of detection. If you like, you can review the full details of the scan reports by examining the files listed above.
Analysis Details
The analysis is done on certificates with the following serial numbers:
- 59846b2f05aaad396a7e942bf33f16b3