Failure to Install due to Virus/Malware

[jwittner]

When trying in install the latest version via the PSGallery I receive this error:

PackageManagement\Install-Package : Package 'PackageManagement' failed to be installed because: Operation did not complete successfully because the file contains a virus or potentially 
unwanted software.

At C:\Program Files\WindowsPowerShell\Modules\PowerShellGet\1.0.0.1\PSModule.psm1:1809 char:21
+ ...          $null = PackageManagement\Install-Package @PSBoundParameters
+                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidResult: (PackageManagement:String) [Install-Package], Exception
    + FullyQualifiedErrorId : Package '{0}' failed to be installed because: {1},Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackage

Specifically, windows defender finds this Trojan: https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Trojan:PowerShell/Peasecto.A

$PSVersionTable -

Name                           Value
----                           -----
PSVersion                      5.1.16299.98
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.16299.98
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

[System.Environment]::OSVersion -

Platform ServicePack Version      VersionString
-------- ----------- -------      -------------
 Win32NT             10.0.16299.0 Microsoft Windows NT 10.0.16299.0

Get-MpComputerStatus relevant items -

AMEngineVersion                 : 1.1.14500.5
AMProductVersion                : 4.12.17007.18011
AMServiceEnabled                : True
AMServiceVersion                : 4.12.17007.18011
AntispywareEnabled              : True
AntispywareSignatureAge         : 0
AntispywareSignatureLastUpdated : 2018-01-28 09:22:07
AntispywareSignatureVersion     : 1.261.416.0
AntivirusEnabled                : True
AntivirusSignatureAge           : 0
AntivirusSignatureLastUpdated   : 2018-01-28 09:22:08
AntivirusSignatureVersion       : 1.261.416.0

[jwittner]

I'm starting to think this may be an issue with the new virus definitions. I get the same error when trying to install the PSScriptAnalyzer module from PSGallery. I don't get it for every module from the gallery however.

[KevinMarquette]

The Windows Defender issue is resolved in definition update 1.261.424.0

PS:> Get-MpComputerStatus | Select AntivirusSignature*

AntivirusSignatureLastUpdated   : 1/28/2018 8:28:37 PM
AntivirusSignatureVersion       : 1.261.424.0

[jwittner]

As of this morning I'm on 1.261.449.0 and still seeing it:

AntivirusSignatureAge AntivirusSignatureLastUpdated AntivirusSignatureVersion
--------------------- ----------------------------- -------------------------
                    0 2018-01-29 10:13:55           1.261.449.0

[jwittner]

Alright, got another update and the issue has gone away:

AntivirusSignatureAge AntivirusSignatureLastUpdated AntivirusSignatureVersion
--------------------- ----------------------------- -------------------------
                    0 2018-01-29 18:40:04           1.261.473.0