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Windows 7: Check for Virus in Single File Including Zip or Other Compression

13 Dec 2017   #1
dw85745

Win 7 Pro x32
 
 
Check for Virus in Single File Including Zip or Other Compression

If one downloads a file using a browser they receive a download dialog to save or open a file.
Questions:

1) Does Windows Defender check this file for viruses while it is being downloaded?
2) Does this check include compressed formats such as Zip or 7Zip open?
3) Once the file in on my system, is there anyway for me to check that "single" file
for viruses on my system -- ie NOT having to go out to a separate file checker site?


My System SpecsSystem Spec
.
13 Dec 2017   #2
torchwood

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring
 
 

Hi DW,

Most AV's add to the right click context options, - scan with MSE/Malwarebytes/ etc
Once you have >>SAVED<< it to the destination folder or desktop -right click shows ALL options
Its to late if you have run it
(mine shows scan with Bitdefender and Malwarebytes)

AV's dont scan during the download allthough they do advise against dodgy sites, and offer a get me out of here option.
It doesnt matter if its a Zip file or not

note
the right click option is allways available


Roy
My System SpecsSystem Spec
13 Dec 2017   #3
dw85745

Win 7 Pro x32
 
 

Hi Roy:

Since Windows Defender is part of the OS, doesn't give right click option
to run against specific file.

Maybe just third party depending on AV chosen.
My System SpecsSystem Spec
.

13 Dec 2017   #4
samuria

win 8 32 bit
 
 

The problem is a lot of malware comes down as a clean file so av let's it through then when run it downloads the virus or malware
My System SpecsSystem Spec
13 Dec 2017   #5
MSClin

Windows 7 Ultimate 32-bit, Linux Mint 19.0 Xfce 64-bit
 
 

Quote   Quote: Originally Posted by dw85745 View Post
1) Does Windows Defender check this file for viruses while it is being downloaded?
No, but AV software can do that (depending on how good the real-time protection the AV has). I've tested 7 AV's in total for this, but only one of them had this feature.

Quote   Quote: Originally Posted by dw85745 View Post
2) Does this check include compressed formats such as Zip or 7Zip open?
I don't know if you're talking specifically about if Windows Defender can do that, so I answer - Windows Defender can't do that. Windows Defender can't even check the file while it is being downloaded. But again - AV software can do that, although not much AV's can do that.

Quote   Quote: Originally Posted by dw85745 View Post
3) Once the file is on my system, is there anyway for me to check that "single" file for viruses on my system -- ie NOT having to go out to a seperate file checker site?
Yes, use AV software to scan it. Keep in mind that Windows Defender is software for protection against spyware or adware, this is not AV software.
My System SpecsSystem Spec
13 Dec 2017   #6
dw85745

Win 7 Pro x32
 
 

Thanks for all input:
MSClin: Care to share which of the 7 AV's will check while doing download.
My System SpecsSystem Spec
14 Dec 2017   #7
Bat 1

8.1 home x64
 
 

Checking for Malware on an unpacked ISO, RAR or Zip files is for the most part useless. The file really needs to be unpacked. As posted above, checking with MSE/Defender isn't a simple right click option. I put the download into a folder usually named Test either in Downloads or on My Desktop then open the Defender GUI and click on Custom Scan. you'll have to goto C: > Users > Your Name > etc. and find the "Test" folder, then click OK and Defender will scan that folder only. Better options for right click scans are SuperAntiSpyware http://www.superantispyware.com/ and Malwarebytes https://www.malwarebytes.com/ *Always be sure to update Definitions on the Free versions before scanning. Another Good option when dealing with unknown programs is running your PC in a Sandbox. https://www.sandboxie.com/DownloadSandboxie

I was once very active in Warez and torrents Sites so some people who see My Tag and Avy might be surprised that I recommend so strongly Against the use of unauthorized Games and Program Apps. As samurai posted there's some extremely dangerous Malware that can detect if it's being run in a Sandbox or Virtual Machine and may take Days or even Weeks before it starts infecting the OS.
My System SpecsSystem Spec
14 Dec 2017   #8
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
 
 

Built in Defender is a out date by many years in Window 7.

I would suggested trying Microsoft Security Essentials. I have used it for years on two Windows 7 systems.

If and when you do change to 'MSE' it should turn off Windows 7 Defender.

Free Virus Protection with Microsoft Security Essentials

Jack
My System SpecsSystem Spec
14 Dec 2017   #9
dw85745

Win 7 Pro x32
 
 

Bat 1 and Layback Bear:
Thanks -- good information to have.

IMHO this thread should be a sticky in "Security".
My System SpecsSystem Spec
14 Dec 2017   #10
MSClin

Windows 7 Ultimate 32-bit, Linux Mint 19.0 Xfce 64-bit
 
 

Quote   Quote: Originally Posted by dw85745 View Post
MSClin: Care to share which of the 7 AV's will check while doing download.
"Advanced SystemCare Ultimate", but I don't recommend you installing or trying it, it can mess your system if not used properly. I am saying this because it isn't only AV.
My System SpecsSystem Spec
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 Check for Virus in Single File Including Zip or Other Compression




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