Should I block it?

Yes, 98% block recommendation.
Possible reasons:
Multiple malware detections
Performance resource utilization

VersionsAdditional versions

1, 0, 0, 1 50.00%
1, 0, 0, 1 50.00%
(Note, Mindspark Interactive Network publishes each variation of this file with the same version, but the hashes are unique.)



Webfetti Installer Plugin Stub by Mindspark Interactive Network (Signed)

Remove NP52EISb.dll
Version:   1, 0, 0, 1
MD5:   604241615222e03564b44d33d92a61b3
SHA1:   b0442cde876e01a747abfd5bcee25cd88c0955ed
SHA256:   3682191219534aa092267bd55347efa1f2ed812e5e12e93022b8a5ea0bb2ff63
Warning 9 antivirus scanners has detected malware.


np52eisb.dll is malware that is loaded as dynamic link library that runs in the context of the Google Chrome web browser. The file is digitally signed by Mindspark Interactive Network which was issued by the VeriSign certificate authority (CA).


File name:np52eisb.dll
Product name:Webfetti Installer Plugin Stub
Description:Webfetti Installer Plugin Stub for 32-bit Windows
Typical file path:C:\Program Files\webfetti_52ei\installr\1.bin\np52eisb.dll
File version:1, 0, 0, 1
Product version:2, 3, 0, 0
Size:30.05 KB (30,776 bytes)
Issued to:Mindspark Interactive Network
Authority (CA):VeriSign
Effective date:Monday, May 31, 2010
Expiration date:Monday, May 7, 2012
Digital DNA
File packed:No
More details


Mozilla plugins
Google Chrome plugins
Stored per user in the directory 'Google\Chrome\User Data\Default\Preferences'
  • Name: 'NP52EISB.dll'

MalwareMalware detections

Based on 40+ industry antivirus scanners, 9 of them detected the following malware.
Antivirus engineEngine versionDetection
AhnLab V3 Internet Security 2013.06.05 Adware/Win32.MyWebSearch
Antiy Labs AVL WebToolbar/Win32.MyWebSearch.gen
avast! 6.0.1289.0 Win32:FunWeb-K [PUP]
AVG 2014.0.3629 Skodna.Generic.PU
Comodo Internet Security 16375 Application.Win32.WebToolbar.MyWebSearch
Dr.Web Tool.InstallToolbar.5
Kaspersky not-a-virus:WebToolbar.Win32.MyWebSearch.rh
Rising Antivirus Trojan.Win32.Generic.12BE6940
VIPRE Antivirus 18428 MyWebSearch.J (v) (not malicious)

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Professional 50.00%
Windows 7 Home Premium 50.00%

Distribution by countryDistribution by country

United Kingdom installs about 50.00% of Webfetti Installer Plugin Stub.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Samsung 50.00%
Acer 50.00%
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