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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Problem
"Removable disk" Encryption is enabled and the policy applied to the machines, but nothing happens when the client connects USB drive.
Solution
Encryption of the removable drives supports two modes:
Encrypt entire removable drive: based on Kaspersky Full Disk Encryption (FDE), the entir
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There are multiple settings in both KES and KSC that allow to set notifications about various events. This article is based on example of setting complaint notification (message send to administrator if the users considers the blocking of the page to be mistaken).
Let's review three main scenarios, when KES is connected to KSC (either constantly or intermittently) and when it is not connected.
KES
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Problem
When KES installation fails with error message "Failed to access local group policy. Error 0x80004005", installation log should be checked. If it contains something similar, follow the steps below.
MSI (s) (F4:94) [11:27:28:103]: Invoking remote custom action. DLL: C:\WINDOWS\Installer\MS
This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
These logs are needed only in specific cases, to save time and effort do not collect these logs unless explicitly requested.
Behaviour Stream Signatures or BSS is a major part of System Watcher. Sometimes its logs are required to diagnose the issue.
Step-by-step guide
BSS log collecting is started via bases, so when you activate logging via the avp.com command, it will re
Problem
Application category based on the "Metadata" conditions created, but does not work.
Solution
This is expected behavior, in case the file does not have a digital signature, that can be trusted by local KES on the host in question, or is not known in KSN. Use sigcheck tool to see if the file has a valid digital signature – https://technet.microsoft.com/ru-ru/sysinternals/bb897441.aspx
Use other criteria, to determine the category (for example file hash).
Problem
KSWS10 and KSWS11 may have two issues because of the Application Control component:
Can't uninstall KSWS with the error "There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run"
Can't run GSI with this error "Unable to unpack the critical file. GsiSharp.bin"
Solution
Disable Application Control and retry uninstallation.
Сollect GSI, if necessary.
Problem
Sometimes Anti-Cryptor task in KESL won't be able to launch after the OS is started. This may happen because Anti-Cryptor needs all the protected network resources to be up before KESL service is started. In other words, Samba or NFS services should be started before KESL service.
Solution
To resolve this problem you need to make sure that services start in the correct order.
For Systemd systems:
1. Create a file /etc/systemd/system/kesl.service.d/override.conf
Problem
The "Install application remotely" task wizard presents an option to specify an SSH certificate as account credentials, if Linux package is selected for installation.
The wizard does not accept certain certificates and fails to provide informative error messages why this happens.
Examples:
Failed to upload the certificate.
Failed to import the private key of the certificate.
Root cause
KSC 13.2 only accepts PEM certificates, they start with
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
In cases when Bitlocker encryption of a certain volume is started using KES Bitlocker management, and the product returns the following error:
Event type: The policy can not be applied.
Action: Encryption
Reason: The system drive is not compatible with the Microsoft BitLocker encryption.
Type of encryption: dis
In Compact Diagnostic Interface
Can be checked in "About the application" window.
In Kaspersky Security Console
Can be checked in Action -> Information about the application and available module updates...
Problem
In some cases, it is possible to run a database upgrade task on the KSWS/KICS/KESS host, but despite the upgrade task successfully completing, the databases are still out of date.
Solution
Most probably product operates in UpdateBlackListOnly mode. This happens in cases when product is activated with activation code and is unable to reach our activation servers. Thus KSWS fails to receive/refresh activation ticket and downloads updates only for Blacklist.
Possible way
This instruction is relevant only in case of troubleshooting incorrect loading or rendering of a web page.
In order to troubleshoot issues KES network traffic related issues traffic dump is required. It is easier to analyze and does not require third-party software installation.
If reproduction of the issue requires the web browser to open web pages(such as web control non-working as expected, web page not loading, and so on), the tests should be performed in Incognito mod
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Trojan.Multi.Accesstr detection is triggered when KES detects that one of Windows utilities in %systemroot%\system32 folder is replaced by cmd.exe or powershell.exe. Please see below for a list of affected files with exact detection names. Detection event looks like this:
Problem
If you found out that KSWS installations are somehow corrupted, and you're not able to remove it using conventional means (using misexec and/or appwiz.cpl), please do not use kavremover and/or mszap tools. Do not attempt removing the product manually as our goal is to determine the root cause of the product moving to this inconsistent state.
Solution
Please provide Kaspersky Support with the pertinent GSI log of the affected host and KSWS msi installer logs containing all
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
There are two real-world scenarios related to KES FDE encryption and licensing that often result in unexpected behavior of encrypted devices:
FDE encryption is used with the Advanced license and later replaced with the Select license (or any other license without encryption).
Encryption license is expir
While removing Kaspersky Security for Windows Server Console removal log may contain a message:
Error 1336. There was an error creating a temporary file that is needed to complete this installation.
Folder: C:\Program Files (x86)\Common Files\Kaspersky Lab\Kaspersky Security for Windows Server\.
System error code: 5
And if you launch removal process using an appwiz.cpl a popup will be displayed stating :
“There was an error creating a temporary file that is needed to complete
Problem
You might notice that large files named like PR*.tmp appear in C:\Windows\Temp.
Cause
This is known and expected behavior. When the product scans an object it creates a temporary copy, names it like PR*.tmp and places it in the temp folder.Once the scan is complete, this temporary file gets deleted.
Large PR*.tmp files mean that some large objects are scanned by OAS (On-Access Scan) or ODS (On-Demand Scan).
Solution
In some cases there might be not enough sp
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
This is a rough guide for testing FDE prior to implementation in production.
Make sure that the encrypted hosts will be serviced by a healthy KSC infrastructure (backups are performed regularly, no errors in Kaspersky Event log that need to be addressed, healthy database with plenty room for growth, no clo
This error message means that KSWS KSN-Client was unable to reach KSN Cloud servers (in most cases if KSN Proxy is used).
Possible causes of the issue:
Various transport-level issues
KSC Server has been moved to another host with new DNS-name and IP-address
Troubleshooting steps:
Check that KSC is accessible via both its IP address and its hostname
Check that option "Bypass proxy for local addresses" is enabled (KSC server properties > Advanced > C
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Testing Network Threat Protection (NTP, Network Attack Blocker or NAB) may appear tricky, as it is finely tuned to specific attacks only. During past years many detections were modified or removed to prevent major false detections. It is necessary to understand that NTP is not intended to prevent the following types of attac
Problem
In some cases KESMac is not able to start protection components:
Or, the status "Allow encrypted traffic to be inspected" is not changing:
Solution
1) Please get acquainted with the article https://support.kaspersky.com/kis20mac/error/15031#block1;
2) If the article above did not help, try to remove the FireFox user's profiles directory via Terminal:
rm -rf ~/Library/Application
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This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Sometimes it is required to unregister KES from context menu of Explorer. Follow these steps:
Disable self-defense of KES;
Open CMD shell as admin;
Run commands:
regsvr32 /u C:\Program Files (x86)\Kaspersky
The Application Control component has a category called Browser extensions. There is a known limitation for it in Chrome.
If an extension runs in an already running Chrome process (many of them run as newly started Chrome processes, especially for extension reasons), it cannot be blocked because it is not a newly started process and the extension itself is not an executable. It requires an .exe file to load. An extension that is already running cannot be blocked by application control (it h
In KSWS/KESS/KICS there is an option in update task to Lower the load on the disk I/O.
It is important to understand that when this option is enabled the task does not use HDD resources at all. Updater will not only place current updates to RAM. Update temp and cache files will also be placed there.
Incorrect expectation: The task uses dedicated amount of RAM, in case if dedicated RAM is not enough for all update files including temp and cache task will continues through HDD.
Actu
Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials.
This article is about Kaspersky Endpoint Security for Windows (KES for Windows)
Problem
HIPS (Host Intrusion Prevention System) unexpectedly blocks data stream (audio, video) in trusted communication software such as MS Teams, Skype, Skype for Business etc.
Solution
The root cause is in KUsrInit.exe (parent process for many processes in the OS where it exists) which in some cases can be f
