82,399,351 programs installed

Should I remove grassmow?

What percent of users and experts removed it?
80% remove it20% keep it
Overall Sentiment
What do people think about it?
(click star to rate)
How common is it?
Reach 0.0006%
Lifespan of installation (until removal)
< 1.15 days
34.03 days >
Average installed length: 17.88 days


2014.11.26.162215 11.11%
2014.11.10.122055 11.11%
2014.10.27.222650 11.11%
2014.10.20.205810 11.11%
2014.10.19.135847 11.11%
2014.10.12.130356 11.11%
2014.10.05.143132 11.11%
2014.09.25.090218 11.11%
2014.09.15.120410 11.11%


What is grassmow?

grassmow is a web browser extension that injects display advertising in the user's browser. Ads are displayed in the form of banners and contextual text-links and are both injected in white space areas of the HTML page or over existing ads of the underlying web site. These ads are typically for PC optimization utilities, other bundled malware or other types of malvertising.

About  (from Yontoo Technology)

Enhance the web with grassmow.


The most common release is 2014.11.26.162215, with over 98% of all installations currently using this version. Upon being installed, the software adds a Windows Service which is designed to run continuously in the background. Manually stopping the service has been seen to cause the program to stop functing properly. It adds a background controller service that is set to automatically run. Delaying the start of this service is possible through the service manager. It adds a Browser Helper Object (BHO) to Internet Explorer. The primary executable is named grassmowbho.dll. A majority of users end up uninstalling this less than a week of it being installed. The setup package generally installs about 9 files and is usually about 1.5 MB (1,573,602 bytes).
  • Malware detected in the program
  • Integrates into the web browser
  • Installs a Windows Service
  • Typically distributed through a pay-per-install bundle
  • This program has a poor reputation
  • The experts agree, you should remove it!
Warning, multiple anti-virus scanners have detected possible malware in grassmow.
grassmowbho.dll (04cfaa2d14fd2c8cb16c7a8fbfab2c6f) has been flagged by the following 12 scanners:
Anti-Virus softwareVersionDetection
AVG 2015.0.3285 BrowseFox.F
Avira ADWARE/BrowseFox.Gen2
Comodo Security 19509 Application.Win32.BrowseFox.JM
Dr.Web Trojan.BPlug.144
ESET-NOD32 8.10414 a variant of Win32/BrowseFox.O
Fortinet FortiGate 11/20/2014 Riskware/BrowseFox
IKARUS anti.virus t3scan. AdWare.BrowseFox
Malwarebytes v2014.11.20.02 PUP.Optional.Grassmow.A
McAfee 5600.6941 Artemis!04CFAA2D14FD
McAfee-GW-Edition 7.6941 Artemis
Qihoo-360 HEUR/QVM30.1.Malware.Gen
Sophos 4.98 Generic PUA AE
updategrassmow.exe (26109da74ad8ddeef3ef6472f3d1cc3a) has been flagged by the following 8 scanners:
Anti-Virus softwareSoftware versionDetection
avast! 8.0.1489.320 Win32:BrowseFox-CK [PUP]
AVG Generic.D31
AVware Yontoo (fs)
ESET-NOD32 10619 a variant of MSIL/BrowseFox.H
IKARUS anti.virus T3. AdWare.MPlug
Malwarebytes PUP.Optional.Grassmow.A
TrendMicro-HouseCall 9.700.0.1001 Suspicious_GEN.F47V1024
VIPRE Antivirus 34232 Yontoo (fs)
       View all 20 all detections
grassmow has been found to be bundled with 3rd party software. If you have not purposefully installed this, you should be safe uninstalling it.
Find out how to remove grassmow.

Program detailsProgram details

Displayed publisher: grassmow
URL: grassmow.org/support
Help link: mailto:[email protected]
Installation folder: C:\Program Files\grassmow
Uninstaller: C:\Program Files\grassmow\grassmowuninstall.exe
Estimated size: 1.5 MB

Program filesFiles installed by grassmow

Program module:grassmowbho.dll (Malware detected)
Path:C:\Program Files\grassmow\grassmowbho.dll
Additional files:
  • 7za.exe (by Igor Pavlov) - 7-Zip (7-Zip Standalone Console)
  • grassmowUninstall.exe
  • (Malware detected) updategrassmow.exe

Program behaviorsBehaviors exhibited

Internet Explorer BHO
  • grassmowbho.dll is installed in Internet Explorer as a BHO (Browser Helper Object) under the name 'grassmow' with the class of {dff180a7-25c2-41c7-82d2-1960ce0cc82a}.
  • updategrassmow.exe runs as a service named 'Update grassmow' (Update grassmow).

How do I remove grassmow?

Quickly and completely remove grassmow from your computer by downloading "Should I Remove It?", its 100% FREE and installs in seconds (click the button below).
Download "Should I Remove It?", it's FREE!Remove grassmow from your computer.
Or, you can uninstall grassmow from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program grassmow, click it, and then do one of the following:
    • Windows Vista/7/8: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove grassmow.
  4. If for some reason uninstallation fails, please install Microsoft's uninstall fixer utility which will help fix problems with programs that can't be uninstalled at support.microsoft.com.

How do I reset my web browser?

If your web browser homepage and search settings have been modfied by grassmow you can restore them to their previous default settings.
Microsoft Internet Explorer
Mozilla Firefox
Google Chrome
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If you do not have a good anti-virus program, please consider installing one. Below are some we highly recommend.

Win 8 44%
Win Vista (SP2) 11%
Windows Service? Yes
(Installs a service)
Uninstall it 80%
Keep it 20%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 8 44.44%
Windows 7 33.33%
Windows Vista 22.22%
Which OS releases does it run on?
Windows 7 Home Premium 33.33%
Windows 8.1 33.33%
Windows Vista Home Premiu... 22.22%
Windows 8.1 Connected 11.11%

Distribution by countryGeography

50.00% of installs come from the United States
Which countries install it?
  United States 50.00%
  United Kingdom 21.43%
  France 14.29%
  Canada 14.29%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Toshiba 33.33%
Acer 22.22%
Sony 11.11%
Hewlett-Packard 11.11%
Packard Bell 11.11%
ASUS 11.11%
Common models
Sony VGN-AW41JF_H 12.50%
HP Pavilion dv9700 Notebo... 12.50%
Acer Aspire V3-571 12.50%
ASUSTeK U52F 12.50%

About Yontoo Technology

Yontoo, a subsidiary/alias of ad-hijacker Sambreel, is a publisher of ad-supported web browser extensions designed to inject and display advertisements within the browser.
Publisher URL: www.yontoo.com


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