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What is IStreamSearch?

The Malwarebytes research team has determined that IStreamSearch 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.

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

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


and this changed setting:


You may have noticed these warnings during install:





How did IStreamSearch 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 IStreamSearch?

Our program Malwarebytes can detect and remove this search hijacker.

  • 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 IStreamSearch?

  • No, Malwarebytes removes IStreamSearch completely.

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 IStreamSearch 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 DefaultSearchURL: Default -> hxxps://feed.istreamsearch.com/?q={searchTerms}&publisher=istreamsearch&barcodeid=579940000000000
CHR DefaultSearchKeyword: Default -> IStreamSearch
CHR DefaultSuggestURL: Default -> hxxps://api.istreamsearch.com/suggest/get?q={searchTerms}
CHR Extension: (IStreamSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\opfleddepnbchppinbpehkeiigicjdgd [2020-09-23]

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\opfleddepnbchppinbpehkeiigicjdgd\1.1.0_0
       Adds the file manifest.json"="9/23/2020 8:45 AM, 2096 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\opfleddepnbchppinbpehkeiigicjdgd\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="9/23/2020 8:45 AM, 6255 bytes, A
       Adds the file verified_contents.json"="9/2/2020 2:17 PM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\opfleddepnbchppinbpehkeiigicjdgd\1.1.0_0\images
       Adds the file logo-white-text.png"="9/2/2020 2:17 PM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\opfleddepnbchppinbpehkeiigicjdgd\1.1.0_0\images\icons
       Adds the file 128x128.png"="9/23/2020 8:45 AM, 10844 bytes, A
       Adds the file 16x16.png"="9/23/2020 8:45 AM, 749 bytes, A
       Adds the file 64x64.png"="9/23/2020 8:45 AM, 4456 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\opfleddepnbchppinbpehkeiigicjdgd\1.1.0_0\scripts
       Adds the file background.js"="9/2/2020 2:17 PM, 514502 bytes, A
       Adds the file sitecontent.js"="9/2/2020 2:17 PM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd
       Adds the file 000003.log"="9/23/2020 8:45 AM, 0 bytes, A
       Adds the file CURRENT"="9/23/2020 8:45 AM, 16 bytes, A
       Adds the file LOCK"="9/23/2020 8:45 AM, 0 bytes, A
       Adds the file LOG"="9/23/2020 8:45 AM, 0 bytes, A
       Adds the file MANIFEST-000001"="9/23/2020 8:45 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_opfleddepnbchppinbpehkeiigicjdgd
       Adds the file IStreamSearch.ico"="9/23/2020 8:45 AM, 202430 bytes, A
       Adds the file IStreamSearch.ico.md5"="9/23/2020 8:45 AM, 16 bytes, A

Registry details [View: All details] (Selection)
       "opfleddepnbchppinbpehkeiigicjdgd"="REG_SZ", "30C763B249BE479A901D04BFE01EFBE2EF8ECA9766527032EBD9D1DD3CB41EDE"

Malwarebytes log:


-Log Details-
Scan Date: 9/23/20
Scan Time: 8:54 AM
Log File: a47fd922-fd69-11ea-9787-00ffdcc6fdfc.json

-Software Information-
Components Version: 1.0.1045
Update Package Version: 1.0.30280
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: 231661
Threats Detected: 11
Threats Quarantined: 11
Time Elapsed: 4 min, 41 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|opfleddepnbchppinbpehkeiigicjdgd, Quarantined, 15350, 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\opfleddepnbchppinbpehkeiigicjdgd, Quarantined, 15350, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\OPFLEDDEPNBCHPPINBPEHKEIIGICJDGD, Quarantined, 15350, 799722, 1.0.30280, , ame, , , 

File: 8
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 15350, 799722, , , , , 7E179FAA76EE938EB07C166E88BE3012, B636F53B6079363D64B16515CB22DD77203C614EBC35E32AC968C865855310E7
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 15350, 799722, , , , , 800ED3ACF14F34868CECB369DC165AA5, 69C5498C1814D8C0380B1EA07D3B2DC9D84A80B469E03CED93161083B3CB9CBC
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd\000003.log, Quarantined, 15350, 799722, , , , , E6AA6E292EA5F4D72D6233DCCBB67E8D, 6BC7C0D1A4A38BA9EE9328911305A92C8F93ACC88461732F2AB9C416346B5C79
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd\CURRENT, Quarantined, 15350, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd\LOCK, Quarantined, 15350, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd\LOG, Quarantined, 15350, 799722, , , , , 24644A89B12778EAE2738B0168F8CD0D, 4390B5D1BC4AA2F117F4B7BF69432E76BB63E846582EF7A8D634CB57C3EAC655
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\opfleddepnbchppinbpehkeiigicjdgd\MANIFEST-000001, Quarantined, 15350, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\OPFLEDDEPNBCHPPINBPEHKEIIGICJDGD\1.1.0_0\MANIFEST.JSON, Quarantined, 15350, 799722, 1.0.30280, , ame, , DBC0AF6BECF3495D5C5369A4E4894CAF, 56AABCF56F2D4893D7F67B620DF4828CB40809C8FF996794B0B9ADDB5928FE79

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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