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What is YourStreamSearch?

The Malwarebytes research team has determined that YourStreamSearch 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.

recommendations.png

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

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

main.png

and these warnings during install:

warning1.png

warning2.png

warning3.png

warning4.png

and this changed settings:

warning5.png

How did YourStreamSearch get on my computer?

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

webstore.png

after a redirect from their website:

website.png

How do I remove YourStreamSearch?

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 YourStreamSearch?

  • No, Malwarebytes removes YourStreamSearch 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 YourStreamSearch hijacker. It would have blocked their website, giving you a chance to stop it before it became too late.


 

protection1.png

 

Technical details for experts

Possible signs in FRST logs:


 

CHR Notifications: Default -> hxxps://install.yourstreamsearch.com
CHR DefaultSearchURL: Default -> hxxps://feed.yourstreamsearch.com/?q={searchTerms}&publisher=yourstreamsearch&barcodeid=586300000000000
CHR DefaultSearchKeyword: Default -> YourStreamSearch
CHR DefaultSuggestURL: Default -> hxxps://api.yourstreamsearch.com/suggest/get?q={searchTerms}
CHR Extension: (YourStreamSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\kicamljljoimnnikabbhokfefoknlkhk [2021-04-20]

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\kicamljljoimnnikabbhokfefoknlkhk\1.1.0_0
       Adds the file manifest.json"="4/20/2021 8:59 AM, 2132 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\kicamljljoimnnikabbhokfefoknlkhk\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="4/20/2021 8:59 AM, 6725 bytes, A
       Adds the file verified_contents.json"="11/17/2020 2:14 PM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\kicamljljoimnnikabbhokfefoknlkhk\1.1.0_0\images
       Adds the file logo-white-text.png"="11/17/2020 2:14 PM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\kicamljljoimnnikabbhokfefoknlkhk\1.1.0_0\images\icons
       Adds the file 128x128.png"="4/20/2021 8:59 AM, 6594 bytes, A
       Adds the file 16x16.png"="4/20/2021 8:59 AM, 618 bytes, A
       Adds the file 64x64.png"="4/20/2021 8:59 AM, 2969 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\kicamljljoimnnikabbhokfefoknlkhk\1.1.0_0\scripts
       Adds the file background.js"="11/17/2020 2:14 PM, 553475 bytes, A
       Adds the file sitecontent.js"="11/17/2020 2:14 PM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk
       Adds the file 000003.log"="4/20/2021 8:59 AM, 0 bytes, A
       Adds the file CURRENT"="4/20/2021 8:59 AM, 16 bytes, A
       Adds the file LOCK"="4/20/2021 8:59 AM, 0 bytes, A
       Adds the file LOG"="4/20/2021 8:59 AM, 0 bytes, A
       Adds the file MANIFEST-000001"="4/20/2021 8:59 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_kicamljljoimnnikabbhokfefoknlkhk
       Adds the file YourStreamSearch.ico"="4/20/2021 8:59 AM, 185986 bytes, A
       Adds the file YourStreamSearch.ico.md5"="4/20/2021 8:59 AM, 16 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings]
       "kicamljljoimnnikabbhokfefoknlkhk"="REG_SZ", "1FBDB4D8EB8F99BD39FBEFF5B7B467AD535B75CCC565A1BB3C5CB2327BE6B999"

Malwarebytes log:
 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 4/20/21
Scan Time: 9:10 AM
Log File: 74874f24-a1a7-11eb-9d50-080027235d76.json

-Software Information-
Version: 4.3.0.98
Components Version: 1.0.1251
Update Package Version: 1.0.39611
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: 233909
Threats Detected: 12
Threats Quarantined: 12
Time Elapsed: 3 min, 54 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|kicamljljoimnnikabbhokfefoknlkhk, Quarantined, 16336, 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\kicamljljoimnnikabbhokfefoknlkhk, Quarantined, 16336, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\KICAMLJLJOIMNNIKABBHOKFEFOKNLKHK, Quarantined, 16336, 799722, 1.0.39611, , ame, , , 

File: 9
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 16336, 799722, , , , , 1F66C49CA2F4F7650F83A631DDD3D233, DE021F4FCC437BC8C081B67275FC01A6AE4BE2B71D74B120FDBED8E0863AE1FC
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 16336, 799722, , , , , DFFDC4FDF875E64BBA781D2CA2062C9A, 957527ABF864997C5F1225ABC3183A764A9A78410DCD01CEBD544E86C8A1F9C6
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk\000003.log, Quarantined, 16336, 799722, , , , , B2FE20A464E93AC7013B373FB58F2085, DC3F7304E517B7E5E9F4CAE3BE403455279BD5F9B75A36A48242DA509D18CBFA
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk\CURRENT, Quarantined, 16336, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk\LOCK, Quarantined, 16336, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk\LOG, Quarantined, 16336, 799722, , , , , 48B5157B52A47A26E6C92ECD01B3B42B, 9FD196126F74CED82F4E0B7684036E32D8665DB2D3603355C342CDAC2E3A750C
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\kicamljljoimnnikabbhokfefoknlkhk\MANIFEST-000001, Quarantined, 16336, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\KICAMLJLJOIMNNIKABBHOKFEFOKNLKHK\1.1.0_0\MANIFEST.JSON, Quarantined, 16336, 799722, 1.0.39611, , ame, , 715F51945BFEF27596E6DA52C64EFC0B, E2864F77131E285554491AADE7F27E366AFD4DC492F131ECF67C52637D84E096
PUP.Optional.PushNotifications.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 201, 832955, 1.0.39611, , ame, , DFFDC4FDF875E64BBA781D2CA2062C9A, 957527ABF864997C5F1225ABC3183A764A9A78410DCD01CEBD544E86C8A1F9C6

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


(end)

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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