SOSVirus » news » PUP.Optional.SearchKnow


SearchKnow is a software usually installed without your knowledge with the download of freeware. In fact some sites use the method of repackaging. This is an operation that is to redo the module software installation by adding download options. These options allow to add other software as for example toolbars browser, or potentially unwanted software. The addition of these new programs can decrease the performance of the system but also slow or redirect internet surfing. As a general rule, should focus on the author’s official site to download your software.
Identified : 10/03/2015.


– It belongs to a family of PUP (Potentially Unwanted Program).
– A polluteware is a software that pollutes storage and/or the Base of registers.
– A toolbar is an additional internet browser bar.
– An Adware is a program that adds other programs without the knowledge of the user.
– Vendor : PUP.Optional

Main Actions

– It installs a plugin of the browser Google Chrome (G2),
– It installs a program of extension for browser Mozilla Firefox (M2),
– It installs a plugin of the browser Mozilla Firefox (P2),
– It is installed as a BHO (Browser Helper Object) of internet browser (O2),
– It installs as a process launched at startup of the system (RP),
– It installs as a service to be launched each time the system (O23),(SS/SR),
– It installs as a program (O42),
– It creates to many registry keys ‘Software’,
– It creates additional folders (O43),
– It moved to the Windows prefetcher folder (O45),

M2 – MFEP: Extension {a57f3b21-dabe-1987-9e47-1142f793f6df}.xpi
O2 – BHO: Search Know – {20c85a3d-2d96-4589-b63f-92fb7ef45a42} . (…) — C:Program Files (x86)Search KnowExtensions20c85a3d-2d96-4589-b63f-92fb7ef45a42.dll
O23 – Service: Service MgrSearchKnow (Service Mgr SearchKnow) . (…) – C:ProgramDatad1d4a9d3-f3f2-4c52-8d3f-dddc91fe0602plugincontainer.exe
O23 – Service: Update MgrSearchKnow (Update Mgr SearchKnow) . (…) – C:Program Files (x86)Common Filesd1d4a9d3-f3f2-4c52-8d3f-dddc91fe0602updater.exe
SR – | Auto 29/08/2015 549624 | (Service Mgr SearchKnow) . (…) – C:ProgramDatad1d4a9d3-f3f2-4c52-8d3f-dddc91fe0602plugincontainer.exe
SR – | Auto 29/08/2015 351992 | (Update Mgr SearchKnow) . (…) – C:Program Files (x86)Common Filesd1d4a9d3-f3f2-4c52-8d3f-dddc91fe0602updater.exe
O42 – Logiciel: Search Know – (.Search Know.) — Search Know

O43 – CFD: 29/10/2015 – 10:24:47 – [] —-D C:Program Files (x86)Search Know
HKLMSoftwareMicrosoftWindowsCurrentVersionUninstallSearch Know

C:Program Files (x86)Search KnowExtensions20c85a3d-2d96-4589-b63f-92fb7ef45a42.dll
C:Program Files (x86)Search Know



Remove Software

– Remove software in Windows Configuration Panel,

Remove with ZHPcleaner

Diagnose with ZHPDiag

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