Antivirus software doesn't check whether a file is digitally signed in Windows

Symptoms

Consider the following scenario:

  • You have a computer that's running Windows 8.1, Windows Server 2012 R2, Windows 8, Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1.

  • You have antivirus software such as Kaspersky Antivirus software installed on the computer.

  • The antivirus software can check whether a file is digitally signed.

  • You receive a specifically crafted or damaged signed file through an email message, an Internet download, or by any other channel.


In this scenario, the antivirus program does not check whether the file is digitally signed, and then the program stops responding. After that, the computer is unprotected, and the antivirus software cannot be restarted, even manually.

Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must running one of the following operating systems:

  • Windows 8.1

  • Windows Server 2012 R2

  • Windows 8

  • Windows 7 SP1

  • Windows Server 2008 R2 SP1

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.


Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2 file information notes

Important Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.16 xxx

    Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.3.9600.16425

227,760

10-Oct-2013

13:03

Not applicable

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.3.9600.16520

236,480

27-Jan-2014

22:11

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.3.9600.16520

317,616

28-Jan-2014

00:17

x64

Windows 8 file information and notes

Important Windows 8 and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM,SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.16 xxx

    Windows 8

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8

    RTM

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.2.9200.16749

261,632

24-Oct-2013

04:06

x86

Wintrust.dll

6.2.9200.20859

265,728

23-Oct-2013

22:39

x86

For all supported x64-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.2.9200.16749

337,408

24-Oct-2013

05:49

x64

Wintrust.dll

6.2.9200.20859

333,824

23-Oct-2013

22:33

x64

Wintrust.dll

6.2.9200.16749

261,632

24-Oct-2013

04:06

x86

Wintrust.dll

6.2.9200.20859

265,728

23-Oct-2013

22:39

x86

For all supported ARM-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.2.9200.16749

221,184

24-Oct-2013

03:11

Not Applicable

Windows 7 and Windows Server 2008 R2 file information notes

Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760 1.18xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760 1.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.1.7601.18380

175,104

28-Jan-2014

02:07

x86

Wintrust.dll

6.1.7601.22583

175,104

28-Jan-2014

02:10

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.1.7601.18380

224,768

28-Jan-2014

02:32

x64

Wintrust.dll

6.1.7601.22583

224,768

28-Jan-2014

02:40

x64

Wintrust.dll

6.1.7601.18380

175,104

28-Jan-2014

02:07

x86

Wintrust.dll

6.1.7601.22583

175,104

28-Jan-2014

02:10

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Wintrust.dll

6.1.7601.18380

500,736

28-Jan-2014

01:40

IA-64

Wintrust.dll

6.1.7601.22583

500,736

28-Jan-2014

01:56

IA-64

Wintrust.dll

6.1.7601.18380

175,104

28-Jan-2014

02:07

x86

Wintrust.dll

6.1.7601.22583

175,104

28-Jan-2014

02:10

x86


Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Additional file information

Additional file information for Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2

Additional files for Windows RT 8.1

File property

Value

File name

Arm_71ca390cd5623c018faf2f62cdbf6281_31bf3856ad364e35_6.3.9600.16519_none_9f8f8e8dccb2bc2b.manifest

File version

Not applicable

File size

700

Date (UTC)

29-Jan-2014

Time (UTC)

06:37

Platform

Not applicable

File name

Arm_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16519_none_84a12556b56a4e71.manifest

File version

Not applicable

File size

2,468

Date (UTC)

29-Jan-2014

Time (UTC)

06:37

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,000

Date (UTC)

29-Jan-2014

Time (UTC)

06:37

Platform

Not applicable

Additional files for all supported x86-based versions of Windows 8.1

File property

Value

File name

Update.mum

File version

Not applicable

File size

2,000

Date (UTC)

29-Jan-2014

Time (UTC)

06:14

Platform

Not applicable

File name

X86_e63f23b4ddfdb6dfb00d3b6867d5517c_31bf3856ad364e35_6.3.9600.16520_none_f017dcca61600c69.manifest

File version

Not applicable

File size

700

Date (UTC)

29-Jan-2014

Time (UTC)

06:14

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_848ae078b57d678d.manifest

File version

Not applicable

File size

2,465

Date (UTC)

27-Jan-2014

Time (UTC)

22:24

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File property

Value

File name

Amd64_1be3e5cdfa7a7adfc58a3afd05f509ad_31bf3856ad364e35_6.3.9600.16520_none_5a2630e540086f55.manifest

File version

Not applicable

File size

704

Date (UTC)

29-Jan-2014

Time (UTC)

06:18

Platform

Not applicable

File name

Amd64_e63f23b4ddfdb6dfb00d3b6867d5517c_31bf3856ad364e35_6.3.9600.16520_none_4c36784e19bd7d9f.manifest

File version

Not applicable

File size

702

Date (UTC)

29-Jan-2014

Time (UTC)

06:18

Platform

Not applicable

File name

Amd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_e0a97bfc6ddad8c3.manifest

File version

Not applicable

File size

2,467

Date (UTC)

28-Jan-2014

Time (UTC)

00:41

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,108

Date (UTC)

29-Jan-2014

Time (UTC)

06:18

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_848ae078b57d678d.manifest

File version

Not applicable

File size

2,465

Date (UTC)

27-Jan-2014

Time (UTC)

22:24

Platform

Not applicable



Additional file information for Windows 8

Additional files for all supported x86-based versions of Windows 8

File name

X86_39c71790c2707a04d52cc9a6d5b9e041_31bf3856ad364e35_6.2.9200.20860_none_0ae0d9cb4d9927c6.manifest

File version

Not Applicable

File size

700

Date (UTC)

24-Oct-2013

Time (UTC)

11:50

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_ebb933153ab3adae9e43d4020c5c8607_31bf3856ad364e35_6.2.9200.16749_none_9d6dcfabf4850a3a.manifest

File version

Not Applicable

File size

700

Date (UTC)

24-Oct-2013

Time (UTC)

11:50

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec898e606b52ad4f.manifest

File version

Not Applicable

File size

2,465

Date (UTC)

24-Oct-2013

Time (UTC)

04:46

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_ecf488b98488a0ec.manifest

File version

Not Applicable

File size

2,465

Date (UTC)

23-Oct-2013

Time (UTC)

23:15

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

Additional files for all supported x64-based versions of Windows 8

File name

Amd64_01b90f40f6170c631181079d3d102147_31bf3856ad364e35_6.2.9200.20860_none_1f50e59e695026b1.manifest

File version

Not Applicable

File size

704

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_39c71790c2707a04d52cc9a6d5b9e041_31bf3856ad364e35_6.2.9200.20860_none_66ff754f05f698fc.manifest

File version

Not Applicable

File size

702

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_60a7c4c9d0c0284c439c37a8da3a6224_31bf3856ad364e35_6.2.9200.16749_none_6e6ef32c8ded68d5.manifest

File version

Not Applicable

File size

1,048

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_bdb5d470219681a2edf2576d162fc11b_31bf3856ad364e35_6.2.9200.16749_none_8dc5de723aec921a.manifest

File version

Not Applicable

File size

704

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_c72ac5d319828c3e19abe6ca88a8adfb_31bf3856ad364e35_6.2.9200.20860_none_1b094121b67a9031.manifest

File version

Not Applicable

File size

1,048

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_ebb933153ab3adae9e43d4020c5c8607_31bf3856ad364e35_6.2.9200.16749_none_f98c6b2face27b70.manifest

File version

Not Applicable

File size

702

Date (UTC)

24-Oct-2013

Time (UTC)

11:51

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_48a829e423b01e85.manifest

File version

Not Applicable

File size

2,467

Date (UTC)

24-Oct-2013

Time (UTC)

07:04

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_4913243d3ce61222.manifest

File version

Not Applicable

File size

2,467

Date (UTC)

24-Oct-2013

Time (UTC)

01:46

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec898e606b52ad4f.manifest

File version

Not Applicable

File size

2,465

Date (UTC)

24-Oct-2013

Time (UTC)

04:46

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_ecf488b98488a0ec.manifest

File version

Not Applicable

File size

2,465

Date (UTC)

23-Oct-2013

Time (UTC)

23:15

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

Additional files for all supported ARM-based versions of Windows 8

File name

Arm_f3857e63cc7e6d0f5eb722235ce39e26_31bf3856ad364e35_6.2.9200.16749_none_ebff436683a0b3fc.manifest

File version

Not Applicable

File size

700

Date (UTC)

24-Oct-2013

Time (UTC)

11:49

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Arm_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec8c00b86b4fcc15.manifest

File version

Not Applicable

File size

2,465

Date (UTC)

24-Oct-2013

Time (UTC)

06:39

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable



Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File property

Value

File name

Update.mum

File version

Not applicable

File size

2,138

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

X86_231d569c2514accadf3d265e26ea1023_31bf3856ad364e35_6.1.7601.22583_none_ab0d57423308f63c.manifest

File version

Not applicable

File size

700

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

X86_8cc8ccda27105cd7abbeaa93434c8b26_31bf3856ad364e35_6.1.7601.18380_none_0eb0162fa282296c.manifest

File version

Not applicable

File size

700

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:35

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:39

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File property

Value

File name

Amd64_0e4c0a4461db77abeb0c3069dc0e847c_31bf3856ad364e35_6.1.7601.22583_none_1ef6a8d275894f71.manifest

File version

Not applicable

File size

1,048

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_1c10e39c997fcac54e396e9655b06710_31bf3856ad364e35_6.1.7601.18380_none_00713d8267ec2339.manifest

File version

Not applicable

File size

704

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_231d569c2514accadf3d265e26ea1023_31bf3856ad364e35_6.1.7601.22583_none_072bf2c5eb666772.manifest

File version

Not applicable

File size

702

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_8cc8ccda27105cd7abbeaa93434c8b26_31bf3856ad364e35_6.1.7601.18380_none_6aceb1b35adf9aa2.manifest

File version

Not applicable

File size

702

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_a332ca0bae39b983d63480fd3e3d7e6a_31bf3856ad364e35_6.1.7601.18380_none_219a950070f28dc2.manifest

File version

Not applicable

File size

1,048

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_f63c52dc5507f032451a29d3c8c52954_31bf3856ad364e35_6.1.7601.22583_none_6c3d99b78631c742.manifest

File version

Not applicable

File size

704

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_4d847404b0ececd2.manifest

File version

Not applicable

File size

2,428

Date (UTC)

28-Jan-2014

Time (UTC)

03:02

Platform

Not applicable

File name

Amd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_4e111393ca07d5c8.manifest

File version

Not applicable

File size

2,428

Date (UTC)

28-Jan-2014

Time (UTC)

03:09

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,774

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:35

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:39

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File property

Value

File name

Ia64_551a091ba826b95f6e4fd3d62813096a_31bf3856ad364e35_6.1.7601.18380_none_abaac436592bca13.manifest

File version

Not applicable

File size

1,046

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Ia64_d952294fb9a83f37ad3e69b72e7af5e2_31bf3856ad364e35_6.1.7601.22583_none_840b0dfc138df1c8.manifest

File version

Not applicable

File size

1,046

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

Ia64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f1677c76f88d8498.manifest

File version

Not applicable

File size

2,427

Date (UTC)

28-Jan-2014

Time (UTC)

02:22

Platform

Not applicable

File name

Ia64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f41c0611a86d8e.manifest

File version

Not applicable

File size

2,427

Date (UTC)

28-Jan-2014

Time (UTC)

02:27

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,447

Date (UTC)

28-Jan-2014

Time (UTC)

07:10

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:35

Platform

Not applicable

File name

X86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest

File version

Not applicable

File size

2,426

Date (UTC)

28-Jan-2014

Time (UTC)

02:39

Platform

Not applicable


References

Learn about the terminology Microsoft uses to describe software updates.

Third-party information disclaimer

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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