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What is k9filter.exe?

Part of K9 Web Protection by Blue Coat Systems

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How does k9filter.exe run?

Service - k9filter.exe runs as a background Windows service called 'bckwfs' (Blue Coat K9 Web Protection). This service runs as the SYSTEM account with extensive privileges on the local computer, and acts as the computer on the network. Blue Coat K9 Web Protection runs as a program that can be started by the Service Controller and that obeys the service control protocol. This type of service runs in a process by itself.


What is the community is seeing?What is the community is doing?
About 0.3% of all Boost users have the k9filter.exe process running.Of the 0.3% of k9filter.exe users, 12.0% have disabled it.
How resource intensive is k9filter.exe?
Comparison based on the average resource utilization across all programs.
0.00027% CPU2723.4%
Average CPU utilization across all programs is 0.00001%.
14.59 MB RAM67.7%
Average private memory utilization across all programs is 21.53 MB.
     111 /min4.9%
Average I/O read and write operations for all programs is 2,253 per minute.
Typical file (disk image) location:
C:\Program Files\blue coat k9 web protection\k9filter.exe

Are there other versions of K9 Web Protection?

What Windows OS versions does this run on?

Windows 8.1 (6.2.9200.0)
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File details

File name: k9filter.exe
Publisher: Blue Coat Systems, Inc. (verified)
Name: K9 Web Protection
Description: K9 Web Protection Filter
Version: 4.4.276
Size: 2.52 MB
Original file name: k9filter.exe

Digital certificate

Certificate authority: VeriSign
Effective date: 10/18/2010
Expiration date: 10/18/2013

Resource utilization

CPU utilization averages
Total CPU: 0.0003750521%
Privileged CPU: 0.0001027153%
User CPU: 0.00027233680412%
Privileged CPU time: 66218.75 ms
Privileged CPU time /min: 37 ms
CPU cycle count: 595,509,110
CPU cycle count /min: 184,879,239
Memory utilization averages
Committed memory: 66.57 MB
Peak committed memory: 80.98 MB
Paged memory: 14.59 MB
Peak paged memory: 16.05 MB
Paged system memory: 84.13 KB
Non-paged system memory: 223.16 KB
Working set memory: 19.58 MB
Peak working set memory: 20.14 MB
Min working set memory: 16.96 MB
Private memory: 14.59 MB
Page faults: 131,390
Page faults /min: 74
Process I/O averages
Total read operations: 42,997
Read operations /min: 24
Total read transfer: 291.65 MB
Read transfer /min: 168.84 KB
Total write operations: 153,956
Write operations /min: 87
Total write transfer: 72.49 MB
Write transfer /min: 41.97 KB
Total other operations: 1,551,973
Other operations /min: 877
Total other transfer: 21.62 MB
Other Transfer /min: 12.52 KB
Handle count average: 303
Thread count average: 16
Thread resource averages

Process details

Runs as (owner): System
Integrety level: System
Windows platform: 64-bit
Runs as a service: Yes
Process Command
"C:\Program Files\Blue Coat K9 Web Protection\k9filter.exe"

Service details

Name: Blue Coat K9 Web Protection
Service name: bckwfs
Service type: Win32OwnProcess
Description: “Provides Internet filtering services for your PC”

Network connectivity

TCP: localhost on port 2372

Image hashes

MD5: 49ecc740aed507520c596ecd48c12667
SHA-1: c38d89171983d01029ff21346762adf940132bd0

PE image details

File packed: No
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