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What is UltimateStreamSearch?

The Malwarebytes research team has determined that UltimateStreamSearch 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.


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

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


and these warnings during install:




and these changed settings:



How did UltimateStreamSearch 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 UltimateStreamSearch?

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 UltimateStreamSearch?

  • No, Malwarebytes removes UltimateStreamSearch 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 the full version of Malwarebytes would have protected you against the UltimateStreamSearch hijacker. It would have blocked their website, giving you a chance to stop before it became too late.




Technical details for experts

Possible signs in FRST logs:


CHR Notifications: Default -> hxxps://install.ultimatestreamsearch.com
CHR DefaultSearchURL: Default -> hxxps://feed.ultimatestreamsearch.com/?q={searchTerms}&publisher=ultimatestreamsearch&barcodeid=584090000000000
CHR DefaultSearchKeyword: Default -> UltimateStreamSearch
CHR DefaultSuggestURL: Default -> hxxps://api.ultimatestreamsearch.com/suggest/get?q={searchTerms}
CHR Extension: (UltimateStreamSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jcblfcpemlkpioffiihkfmmdkcfddjip [2020-12-14]

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\jcblfcpemlkpioffiihkfmmdkcfddjip\1.1.0_0
       Adds the file manifest.json"="12/14/2020 9:27 AM, 2180 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jcblfcpemlkpioffiihkfmmdkcfddjip\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="12/14/2020 9:27 AM, 6725 bytes, A
       Adds the file verified_contents.json"="10/20/2020 9:47 AM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jcblfcpemlkpioffiihkfmmdkcfddjip\1.1.0_0\images
       Adds the file logo-white-text.png"="10/20/2020 9:47 AM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jcblfcpemlkpioffiihkfmmdkcfddjip\1.1.0_0\images\icons
       Adds the file 128x128.png"="12/14/2020 9:27 AM, 1798 bytes, A
       Adds the file 16x16.png"="12/14/2020 9:27 AM, 553 bytes, A
       Adds the file 64x64.png"="12/14/2020 9:27 AM, 1390 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jcblfcpemlkpioffiihkfmmdkcfddjip\1.1.0_0\scripts
       Adds the file background.js"="10/20/2020 9:47 AM, 553511 bytes, A
       Adds the file sitecontent.js"="10/20/2020 9:47 AM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip
       Adds the file 000003.log"="12/14/2020 9:27 AM, 0 bytes, A
       Adds the file CURRENT"="12/14/2020 9:27 AM, 16 bytes, A
       Adds the file LOCK"="12/14/2020 9:27 AM, 0 bytes, A
       Adds the file LOG"="12/14/2020 9:27 AM, 0 bytes, A
       Adds the file MANIFEST-000001"="12/14/2020 9:27 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_jcblfcpemlkpioffiihkfmmdkcfddjip
       Adds the file UltimateStreamSearch.ico"="12/14/2020 9:27 AM, 164974 bytes, A
       Adds the file UltimateStreamSearch.ico.md5"="12/14/2020 9:27 AM, 16 bytes, A

Registry details [View: All details] (Selection)
       "jcblfcpemlkpioffiihkfmmdkcfddjip"="REG_SZ", "E9E057A305F2CAF837D1577BA2B449A004ED21F94BB2D494735BC9D808EBCC59"

Malwarebytes log:


-Log Details-
Scan Date: 12/14/20
Scan Time: 9:36 AM
Log File: 6dc54c46-3de7-11eb-b50e-080027235d76.json

-Software Information-
Components Version: 1.0.1130
Update Package Version: 1.0.34343
License: Premium

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

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 232225
Threats Detected: 12
Threats Quarantined: 12
Time Elapsed: 3 min, 12 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|jcblfcpemlkpioffiihkfmmdkcfddjip, Quarantined, 15785, 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\jcblfcpemlkpioffiihkfmmdkcfddjip, Quarantined, 15785, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\JCBLFCPEMLKPIOFFIIHKFMMDKCFDDJIP, Quarantined, 15785, 799722, 1.0.34343, , ame, , , 

File: 9
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 15785, 799722, , , , , 91083E7F00C73DE23E1E39DAEC55E0D7, 651E73177ACBBE7FF63C5E3C4A4D24907BFA14C24C049EA476A364D8665C03B1
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 15785, 799722, , , , , 9B0E841DC92DAC42D462184128D7F52E, 34B4F2148706187896F5343D9C01A7DB2C5FB07E36D166FA0B3E18766D955190
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip\000003.log, Quarantined, 15785, 799722, , , , , B56B021D8DC34597690DAD20E36B54B6, D5598C44B7A7FB130B099B1F7D3AF81D52415C737DE9FA7F963A4473E021F70E
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip\CURRENT, Quarantined, 15785, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip\LOCK, Quarantined, 15785, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip\LOG, Quarantined, 15785, 799722, , , , , 9D99E15AA0C6E0650BD0D1BB0BCB16DB, 68E8A0A55B97E8F8566538A2082225F4916CCE77A1654811A8936FD38ED6B9B0
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\jcblfcpemlkpioffiihkfmmdkcfddjip\MANIFEST-000001, Quarantined, 15785, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\JCBLFCPEMLKPIOFFIIHKFMMDKCFDDJIP\1.1.0_0\MANIFEST.JSON, Quarantined, 15785, 799722, 1.0.34343, , ame, , 3EF49FDCB6F55E458AC9CA363A9E81E5, 2F37EB907250AEA240B4D775A2AE5B086449EDC53ABAA6437134EA0B6FEA7ED5
PUP.Optional.PushNotifications.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 201, 832955, 1.0.34343, , ame, , 9B0E841DC92DAC42D462184128D7F52E, 34B4F2148706187896F5343D9C01A7DB2C5FB07E36D166FA0B3E18766D955190

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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