84,488,480 programs installed

Should I remove PacFunction?

What percent of users and experts removed it?
87% remove it13% keep it
Overall Sentiment
What do people think about it?
(click star to rate)
How common is it?
Global Rank #20,717
United States Rank #26,243
Reach 0.0102%
Lifespan of installation (until removal)
< 4.93 days
145.49 days >
Average installed length: 76.44 days


2014.04.09.195746 1.00%
2014.04.09.032217 1.49%
2014.04.08.223327 1.00%
2014.04.07.213818 1.99%
2014.04.07.201814 1.00%
2014.04.07.201809 0.50%
2014.04.04.232421 6.47%
2014.04.04.000738 1.49%
2014.04.03.210041 1.99%
2014.04.03.210019 1.00%
2014.04.02.174832 1.49%
2014.04.02.174753 1.49%
2014.04.01.223151 0.50%
2014.04.01.223110 1.00%
2014.03.28.231733 1.00%
2014.03.28.231718 12.94%
2014.03.28.000038 2.99%
2014.03.26.234355 5.47%
2014.03.26.011929 1.00%
2014.03.26.011853 2.49%
2014.03.24.185709 1.00%
2014.03.24.185659 2.99%
2014.03.21.000453 4.48%
2014.03.21.000448 10.45%
2014.03.20.011346 2.49%
2014.03.18.232430 1.49%
2014.03.17.214508 1.99%
2014.03.15.013120 4.98%
2014.03.14.182041 0.50%
2014.03.13.170412 1.49%
2014.03.11.234342 6.47%
2014.03.11.162604 3.48%
2014.03.10.233522 1.49%
2014.03.05.221816 6.47%
2014.02.28.212019 1.99%


What is PacFunction?

TiltBorwser is a Yontoo/Sambreel advertising injection adware browser extension.

- Random web page text is turned into hyperlinks.
- Browser popups appear which recommend fake updates or other software.
- Ads with red click here button will pop up when those links are hovered on.
- Other unwanted adware programs might get installed without the user's knowledge.
- Web pages become extremely slow to download due to the multiple ads.

The software is distributed via download managers including ones from Simply Tech Ltd, Install Lab ltd. (clickandownload.com) and CoolMirage Ltd. (torntv-tvv.org).


The most used version is 2014.03.28.231718, with over 98% of all installations currently using this version. 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 main program executable is PacFunction.FirstRun.exe. Typically most users end up uninstalling this just after a few days. The software installer includes 11 files and is usually about 1.09 MB (1,145,878 bytes).
  • Possible malware installed by this program
  • Loads into the web browser
  • Installs a Windows Service
  • Typically distributed through a pay-per-install bundle
  • Generally known to have a low reputation
  • The experts agree, you should remove it!
Warning, multiple anti-virus scanners have detected possible malware in PacFunction.
PacFunctionBHO.dll (05bdaaa29e6b256cb966b90306ddc033) has been flagged by the following 32 scanners:
Anti-Virus softwareVersionDetection
Lavasoft Ad-Aware 1018 Adware.Agent.NYU
Agnitum Outpost 7.1.1 PUA.Agent
Avira AntiVir APPL/BrowseFox.Gen2
Antiy-AVL GrayWare[AdWare:not-a-virus]/Win32.Agent
avast! 2014.9-140422 Win32:PUP-gen [PUP]
AVG 2015.0.3496 MalSign.Pafun
Bitdefender Adware.Agent.NYU
CAT-QuickHeal AdWare.Agent.r5 (Not a Virus)
Comodo Security 18135 Application.Win32.Altbrowse.AK
Dr.Web Trojan.BPlug.28
Emsisoft Anti-Malware Adware.Agent.NYU
ESET-NOD32 8.9701 a variant of Win32/BrowseFox.F
Fortinet FortiGate 4/22/2014 Riskware/BrowseFox
F-Secure 11.2014-22-04_3 Adware.Agent.NYU
G Data 14.4.24 Adware.Agent.NYU
IKARUS anti.virus t3scan. AdWare.Agent
Jiangmin KV140422 Adware/Agent.jaw
K7 AntiVirus 13.176.11806 Unwanted-Program
K7GW 13.176.11806 Unwanted-Program ( 00454f261 )
Kaspersky not-a-virus:AdWare.Win32.Agent
Kingsoft AntiVirus 331020.49267 Win32.Troj.Agent.ah.(kcloud)
Malwarebytes v2014.04.22.04 PUP.Optional.PacFunction.A
McAfee 5600.7152 Artemis!05BDAAA29E6B
McAfee-GW-Edition 7.7152 Artemis!05BDAAA29E6B
MicroWorld-eScan Adware.Agent.NYU
NANO AntiVirus Riskware.Win32.Agent.cqvnby
nProtect Adware.Agent.NYU
Sophos 4.98 Generic PUA MH
SUPERAntiSpyware 10650 Adware.BrowseFox/Variant
TrendMicro-HouseCall 7.2.112 TROJ_GEN.F47V0320
Vba32 AntiVirus AdWare.Agent
VIPRE Antivirus 28420 Yontoo (fs)
updatePacFunction.exe (d3362227a4bfba3792cfbb22ed699494) has been flagged by the following 26 scanners:
Anti-Virus softwareSoftware versionDetection
Agnitum Outpost Riskware.Agent!
AhnLab-V3 2014.11.02.00 PUP/Win32.SwiftBrowse
Antiy-AVL GrayWare[AdWare:not-a-virus,HEUR]/MSIL.Kranet
AVG Pafun.E1F
Avira ADWARE/BrowseFox.Gen7
AVware Yontoo (fs)
Baidu-International Adware.Win32.BrowseFox.bH
CAT-QuickHeal 14.00 AdWare.MSIL.r3 (Not a Virus)
Comodo Security 19968 ApplicUnwnt
Dr.Web Trojan.BPlug.250
ESET-NOD32 10656 a variant of Win32/BrowseFox.H
Fortinet FortiGate 5.0.999.0 Adware/Kranet
K7 AntiVirus 9.185.13866 Trojan ( 0049f7ad1 )
K7GW 9.185.13866 Trojan ( 0049f7ad1 )
Kaspersky not-a-virus:HEUR:AdWare.MSIL.Kranet.heur
Kingsoft AntiVirus 2013.4.9.267 Win32.Troj.Generic.a.(kcloud)
Malwarebytes PUP.Optional.PacFunction.A
McAfee BrowseFox.c
McAfee-GW-Edition v2014.2 BehavesLike.Win32.Dropper.fh
nProtect 2014-10-31.01 Trojan-Clicker/W32.Agent.323360.B
Qihoo-360 Win32/Virus.Adware.e4c
Sophos 4.98.0 Generic PUA LP
Symantec 20141.1.0.330 Trojan.Gen.2
Trend Micro 9.740.0.1012 TROJ_GEN.R0C1C0EJH14
TrendMicro-HouseCall 9.700.0.1001 TROJ_GEN.R0C1C0EJH14
VIPRE Antivirus 34448 Yontoo (fs)
       View all 58 all detections
PacFunction has been found to be bundled with 3rd party software. If you have not purposefully installed this, you should be safe uninstalling it.

Program detailsProgram details

Displayed publisher: PacFunction
URL: pacfunction.info/support
Help link: mailto:[email protected]
Installation folder: C:\Program Files\PacFunction
Uninstaller: C:\Program Files\PacFunction\PacFunctionuninstall.exe
Estimated size: 1.09 MB

Program filesFiles installed by PacFunction

Program executable:PacFunction.FirstRun.exe
Path:C:\Program Files\PacFunction\PacFunction.FirstRun.exe
Additional files:
  • (Malware detected) PacFunctionBHO.dll - PacFunction
  • 7za.exe (by Igor Pavlov) - 7-Zip (7-Zip Standalone Console)
  • PacFunctionUninstall.exe
  • (Malware detected) updatePacFunction.exe

Program behaviorsBehaviors exhibited

Internet Explorer BHO
  • PacFunctionBHO.dll is installed in Internet Explorer as a BHO (Browser Helper Object) under the name 'PacFunction' with the class of {9aa72d95-59d7-4421-a02c-f93a1187a165}.
  • updatePacFunction.exe runs as a service named 'Update PacFunction' (Update PacFunction).

How do I remove PacFunction?

You can uninstall PacFunction 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/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program PacFunction, click it, and then do one of the following:
    • Windows Vista/7/8/10: 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 PacFunction.
  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 PacFunction you can restore them to their previous default settings.
Microsoft Internet Explorer
Mozilla Firefox
Google Chrome

Win 7 (SP1) 45%
Win 8 0%
Windows Service? Yes
(Installs a service)
Uninstall it 87%
Keep it 13%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 54.73%
Windows 10 34.83%
Windows XP 7.96%
Windows Vista 2.49%
Which OS releases does it run on?
Windows 7 Home Premium 25.87%
Windows 7 Ultimate 17.91%
Windows 8.1 14.43%
Windows 7 Professional 8.46%
Microsoft Windows XP 7.96%
Windows 8 7.46%

Distribution by countryGeography

29.80% of installs come from the United States
Which countries install it?
  United States 29.80%
  Italy 10.61%
  India 8.08%
  Germany 4.04%
  United Kingdom 3.54%
  United Arab Emirates 3.03%
  Spain 2.02%
  Romania 2.02%
  Belgium 1.52%
  Israel 1.52%
  MA 1.52%
  Mexico 1.52%
  Sweden 1.52%
  Brazil 1.52%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 25.00%
Acer 20.14%
Dell 16.67%
ASUS 12.50%
Toshiba 7.64%
Samsung 4.86%
Intel 3.47%
Lenovo 2.08%
Sony 2.08%
MSI 1.39%
American Megatrends 0.69%
Common models
HP 630 Notebook PC 3.70%
HP Pavilion dv6 Notebook ... 2.78%
Dell OptiPlex 755 2.78%
ASUSTeK X550CC 2.78%
HP Pavilion Sleekbook 15 1.85%
HP Pavilion g6 Notebook P... 1.85%

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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