Should I block it?

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

Relationships

PE structurePE file structure
Show functions
Import table
advapi32.dll
RegQueryValueExA, RegOpenKeyExA, RegFlushKey, RegSetValueExA, RegCreateKeyExA, RegDeleteValueA, RegCloseKey
kernel32.dll
ReleaseMutex, GetProcAddress, CreateEventA, WaitForSingleObject, GetShortPathNameA, LockResource, LoadResource, FindResourceA, InitializeCriticalSection, DeleteCriticalSection, HeapAlloc, lstrcmpiA, HeapReAlloc, HeapFree, LeaveCriticalSection, EnterCriticalSection, LocalFree, GetModuleHandleA, lstrcpynA, GetVersionExA, lstrlenA, GetModuleFileNameA, lstrcpyA, LoadLibraryExA, CreateMutexA, CloseHandle, GetProcessHeap, FreeLibrary
shell32.dll
ShellExecuteA
user32.dll
FindWindowA, wsprintfA, PostMessageA, CallNextHookEx
version.dll
GetFileVersionInfoA, GetFileVersionInfoSizeA, VerQueryValueA
Export table
DllRegisterServer
DllUnregisterServer

5kbrstub.dll

VER_PRODUCT_NAME by Mindspark Interactive Network (Signed)

Remove 5kbrstub.dll
Version:   1,0,2,0
MD5:   933286a7bc611337271bfe6f69383feb
SHA1:   546e5804e61368f4af9e26cd52a469230aed05cd
SHA256:   feb077866ef7ab32bd37d5c2bda7816602b86cd607833eb5a7f6365a05403b1d
Warning 5 antivirus scanners has detected malware.

What is 5kbrstub.dll?

My Web Search by the Mindspark Interactive Network is a browser toolbar, part of the Fun Web Products suite of potentially unwanted applications such as Smiley Central, Cursor Mania, Popular Screensavers and others. The toolbar provides access to search engine results and a 404 Error Redirector among other things to your browser. The My Web Search toolbar could slow down your PC and uses cookies to track your web surfing usage and habits.

About 5kbrstub.dll (from Mindspark Interactive Network)

“The iWon Toolbar installs into your Internet browser and allows you to search the Internet with MyWebSearch® and may provide other search features as further described herein. Default Search, Addres”

DetailsDetails

File name:5kbrstub.dll
Publisher:VER_COMPANY_NAME
Product name:VER_PRODUCT_NAME
Description:VER_DESCRIPTION
Typical file path:C:\Program Files\iWon_5k\bar\1.bin\5kbrstub.dll
Original name:VER_DLL_FILENAME.dll
File version:1,0,2,0
Product version:2,3,0,0
Size:33.39 KB (34,192 bytes)
Certificate
Issued to:Mindspark Interactive Network
Digital DNA
PE subsystem:Windows GUI
File packed:No
.NET CLR:No
More details

MalwareMalware detections

Based on 40+ industry antivirus scanners, 5 of them detected the following malware.
Antivirus engineEngine versionDetection
avast! 6.0.1289.0 Win32:FunWeb-K [PUP]
AVG 2014.0.3629 AdInstaller.FunWeb
Clam AntiVirus 0.97.3.0 Adware.MyWebSearch-18
Norman 6.08.06 W32/MyWebSearch.CFF
VIPRE Antivirus 14342 MyWebSearch.J (v) (not malicious)

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Ultimate N 100.00%

Distribution by countryDistribution by country

United States installs about 100.00% of VER_PRODUCT_NAME.
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