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What is CoolStreamSearch?

The Malwarebytes research team has determined that CoolStreamSearch is a search hijacker. These so-called "hijackers" manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice.
This particular one is a search hijacker and uses web push notifications. It also adds advertisements to your search results in the form of recommended searches.



How do I know if my computer is affected by CoolStreamSearch?

You may see this entry in your list of installed Chrome extensions:


and these warnings during install:




and these changed settings:


How did CoolStreamSearch get on my computer?

Browser hijackers use different methods for distributing themselves. This particular one was downloaded from the webstore:


after a redirect from their website:


How do I remove CoolStreamSearch?

Our program Malwarebytes can detect and remove this potentially unwanted program.

  • Please download Malwarebytes for Windows to your desktop.
  • Double-click MBSetup.exe and follow the prompts to install the program.
  • When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  • Click on the Get started button.
  • Click Scan to start a Threat Scan.
  • When the scan is finished click Quarantine to remove the found threats.
  • Reboot the system if prompted to complete the removal process.

Is there anything else I need to do to get rid of CoolStreamSearch?

  • No, Malwarebytes removes CoolStreamSearch completely.
  • If you have allowed the notifications you can read here how to disable them.

How would the full version of Malwarebytes help protect me?

We hope our application and this guide have helped you eradicate this hijacker.

As you can see below Malwarebytes Browser Guard, and the full version of Malwarebytes would have protected you against the CoolStreamSearch hijacker. It would have blocked their website, giving you a chance to stop it before it became too late.




Technical details for experts

Possible signs in FRST logs:


CHR Notifications: Default -> hxxps://get.coolstreamsearch.com
CHR DefaultSearchURL: Default -> hxxps://feed.coolstreamsearch.com/?q={searchTerms}&publisher=coolstreamsearch&barcodeid=583980000000000
CHR DefaultSearchKeyword: Default -> CoolStreamSearch
CHR DefaultSuggestURL: Default -> hxxps://api.coolstreamsearch.com/suggest/get?q={searchTerms}
CHR Extension: (CoolStreamSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni [2021-02-04]

Alterations made by the installer:

File system details [View: All details] (Selection)
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni\1.1.0_0
       Adds the file manifest.json"="2/4/2021 8:48 AM, 2132 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="2/4/2021 8:48 AM, 6255 bytes, A
       Adds the file verified_contents.json"="9/16/2020 4:58 PM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni\1.1.0_0\images
       Adds the file logo-white-text.png"="9/16/2020 4:58 PM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni\1.1.0_0\images\icons
       Adds the file 128x128.png"="2/4/2021 8:48 AM, 13136 bytes, A
       Adds the file 16x16.png"="2/4/2021 8:48 AM, 748 bytes, A
       Adds the file 64x64.png"="2/4/2021 8:48 AM, 4994 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\blijkdeookckchojnjobhgninmepigni\1.1.0_0\scripts
       Adds the file background.js"="9/16/2020 4:58 PM, 514529 bytes, A
       Adds the file sitecontent.js"="9/16/2020 4:58 PM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni
       Adds the file 000003.log"="2/4/2021 8:48 AM, 0 bytes, A
       Adds the file CURRENT"="2/4/2021 8:48 AM, 16 bytes, A
       Adds the file LOCK"="2/4/2021 8:48 AM, 0 bytes, A
       Adds the file LOG"="2/4/2021 8:48 AM, 0 bytes, A
       Adds the file MANIFEST-000001"="2/4/2021 8:48 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_blijkdeookckchojnjobhgninmepigni
       Adds the file CoolStreamSearch.ico"="2/4/2021 8:48 AM, 203859 bytes, A
       Adds the file CoolStreamSearch.ico.md5"="2/4/2021 8:48 AM, 16 bytes, A

Registry details [View: All details] (Selection)
       "blijkdeookckchojnjobhgninmepigni"="REG_SZ", "4DF99D9673A5EB03234513F84815E3AD4197D2A5F24102C1F2CB274E0515EBF1"

Malwarebytes log:


-Log Details-
Scan Date: 2/4/21
Scan Time: 9:30 AM
Log File: 3a587824-66c3-11eb-9841-080027235d76.json

-Software Information-
Components Version: 1.0.1157
Update Package Version: 1.0.36707
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {username}-PC\{username}

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 233127
Threats Detected: 12
Threats Quarantined: 12
Time Elapsed: 3 min, 24 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 0
(No malicious items detected)

Registry Value: 1
Adware.SearchEngineHijack.Generic, HKCU\SOFTWARE\GOOGLE\CHROME\PREFERENCEMACS\Default\extensions.settings|blijkdeookckchojnjobhgninmepigni, Quarantined, 15232, 799722, , , , , , 

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 2
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni, Quarantined, 15232, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\BLIJKDEOOKCKCHOJNJOBHGNINMEPIGNI, Quarantined, 15232, 799722, 1.0.36707, , ame, , , 

File: 9
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 15232, 799722, , , , , 71429604707ADCC4A53385B531B37680, FAE185739C2808B073C0754000EB40453A24D0BD0AE2B025B0714B81375C861D
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 15232, 799722, , , , , 7444E667A96044ECC4138EA10CAE81C5, 92255DD4AF7D1373DB557E556EA6D78F57385B48AC7B9A847411219D32A5495E
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni\000003.log, Quarantined, 15232, 799722, , , , , 31D6527E5206FEDB2018923E2B8611CB, AE1F2A9C1707778B455E1A6341ED0D36653A3988D0A5913F2D6D9F2AF5F0DAEC
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni\CURRENT, Quarantined, 15232, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni\LOCK, Quarantined, 15232, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni\LOG, Quarantined, 15232, 799722, , , , , C913D847D8309EB100E61D0A5DEBB184, 2B690EE2E2367FAFE883795B2173CDE502B6D38D69C6158F30221935F05E968B
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\blijkdeookckchojnjobhgninmepigni\MANIFEST-000001, Quarantined, 15232, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\BLIJKDEOOKCKCHOJNJOBHGNINMEPIGNI\1.1.0_0\MANIFEST.JSON, Quarantined, 15232, 799722, 1.0.36707, , ame, , A888534CF31EB9525F3693C1C95DB822, 500A9E8CE04D192A0E09183F62CF69D4E78B90862DDC8710F4BA76E0A1A657E6
PUP.Optional.PushNotifications, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 14953, 846248, 1.0.36707, , ame, , 7444E667A96044ECC4138EA10CAE81C5, 92255DD4AF7D1373DB557E556EA6D78F57385B48AC7B9A847411219D32A5495E

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


As mentioned before the full version of Malwarebytes could have protected your computer against this threat.
We use different ways of protecting your computer(s):

  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention

Save yourself the hassle and get protected.

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