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Running, Malicious, Unwanted, Memory Hogs

Welcome to the PC Pitstop Process Library. We maintain an extensive list of common processes running on today’s PCs. Within this library you can learn more about the processes running on your machine.

Process Library Detail

What is msmpeng.exe? Windows Defender?

Vendor:      Microsoft Corporation
Product:     
Vendor Website:      http://onecare.live.com/standard/en-us/default.htm
Last Seen by PC Pitstop:      No Data

Process is Bad PC Pitstop has analyzed this process and determined that there is a high likelihood that it is bad.
Process is questionablePC Pitstop has analyzed this process and determined that the safety of this process is questionable.
Process is goodPC Pitstop has analyzed this process and determined that there is a high likelihood that it is good.
Process is goodThis process is a Microsoft or Windows process, but many viruses use this file name to escape notice.

Purpose: MsMpEng.exe is part of Microsoft's malware protection. Microsoft has used several names for their product including Windows Live OneCare, Windows Defender and latest being Microsoft Security Essentials.

msmpeng.exe is required by third-party software or hardware and should not disabled.


msmpeng.exe is known to be a bad process. Learn more about protecting your PC from these bad processes with PC Matic.
msmpeng.exe could be a harmful process. Learn more about protecging your PC from these potential harmful processes with PC Matic.
This information brought to you by PC Matic. PC Matic's real-time protection, Super Shield, blocks ALL bad and unknown threats to keep your PC secure.
msmpeng.exe is a Microsoft or Windows process but some versions of this exe carry viruses.
Learn more about protecting yourself from bad versions of this file with PC Matic.

Percentage of recently scanned PC's with this process running: 5.61%
Average CPU use for this program: 5%
Average RAM for this program: 51 MB


Program Name MD5 Count
msmpeng.exe

MD5 Hashes

# Status MD5 Revision Name Size
1 Status 0x8cab6b589f6610bf0e20780e153248c1 7/12/2015 6:35:00 PM Unknown Unknown Windows Defender 16 KB
2 Status 0xdda18c8d8799002e5ade55ac378a878d 6/26/2015 2:31:00 PM Unknown Unknown Windows Defender 21 KB
3 Status 0x37f77aebff23a99d1bfb4f34cd2d07f2 5/17/2015 4:17:00 PM Unknown Unknown Windows Defender 21 KB
4 Status 0x0a7f86657755ada92c57e597bf5151f7 2/8/2015 5:14:00 PM Unknown Unknown Windows Defender 21 KB
5 Status 0x581061776e1b7c4c7771e97ae5eaf377 11/29/2014 8:58:00 PM Unknown 1.1.1592.0 Windows Defender 13 KB
6 Status 0x3ea6a1a744d79328ae7e2c6fae4c4420 10/29/2014 12:21:00 PM Unknown Unknown Windows Defender 21 KB
7 Status 0xb910dc7d38f3834119f9c35a56418b3d 3/20/2014 5:22:00 PM Unknown Unknown Windows Defender 14 KB
8 Status 0xe5b069655f93515d9b9fa97726398d2d 1/3/2014 12:32:00 PM Unknown Unknown Windows Defender 14 KB
9 Status 0xc7fd413ceb3b37e1d21e4ff7a4d31162 10/12/2013 1:01:00 AM Unknown Unknown Windows Defender 21 KB
10 Status 0x5595edbda4fd99c82119046c0bdc3be2 7/5/2013 11:25:00 AM Unknown Unknown Windows Defender 13 KB
11 Status 0x13bcc40560fd2938a461b905a6d65f69 6/16/2013 8:37:00 AM Unknown Unknown Windows Defender 21 KB
12 Status 0x0d256342b3d154723676510f416a316d 6/6/2013 6:28:00 PM Unknown Unknown Windows Defender 21 KB
13 Status 0xf50137b8f060790e245c5f600c5844a8 5/26/2013 8:08:00 PM Unknown Unknown Windows Defender 20 KB
14 Status 0xad360a236fb951db405ea699fdc9f521 1/20/2013 6:57:00 PM Unknown Unknown Windows Defender 20 KB
15 Status 0xe238ab774cc0e4261295e23698b81a9c 11/29/2012 8:25:00 PM Unknown Unknown Windows Defender 19 KB
16 Status 0x36a695e1683671009c2fea38b5eb4cd4 10/31/2012 6:24:00 AM Unknown Unknown Windows Defender 13 KB
17 Status 0xaada4de00d483653a0a9c149d60096a0 9/26/2012 3:45:00 AM Unknown Unknown Windows Defender 13 KB
18 Status 0xf4bfeb45546c6082920bf133b6799194 8/30/2012 9:05:00 AM Unknown Unknown Windows Defender 19 KB
19 Status 0xdc60685b2d193e21ca34b00f684e77e8 7/7/2012 8:40:00 PM Unknown Unknown Windows Defender 19 KB
20 Status 0xe4b91e3e5ce22641ba63fc1d5e94ac90 6/11/2012 4:54:00 PM Unknown Unknown Windows Defender 11 KB
21 Status 0x1a660fbeb4383a2bb18b27ad8d719084 6/9/2012 9:27:00 AM Unknown Unknown Windows Defender 11 KB
22 Status 0xb15eceaf5b36c6f9c1b3930a6c3db1de 3/9/2012 9:01:00 AM Unknown Unknown Windows Defender 11 KB
23 Status 0x2bfd3e9dbb922acc6ee7811f89d99c4a 2/21/2012 3:58:00 PM Unknown Unknown Windows Defender 13 KB
24 Status 0x724ae55ec1e78cf617e201d53c125228 2/7/2012 8:13:00 AM Unknown Unknown Windows Defender 11 KB
25 Status 0xbc82daddc6c67bf1da98e84dad577f74 2/5/2012 6:51:00 PM Unknown Unknown Windows Defender 11 KB


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