Anti-Cryptor
January 20, 2022
ID 193942
The Anti-Cryptor task allows you to protect your files in the local directories with network access by SMB/NFS protocols from remote malicious encrypting.
While the Anti-Cryptor task is running, Kaspersky Endpoint Security scans remote computers' calls to access files located in the shared network directories of the protected device. If the application considers a remote computer's actions on network file resources to be malicious encrypting, then this computer is added to a list of untrusted hosts and loses access to the shared network directories.
Kaspersky Endpoint Security does not consider activity to be malicious encrypting if the detected encryption activity takes place in directories excluded from the scope of the Anti-Cryptor task.
By default, Kaspersky Endpoint Security blocks untrusted hosts' access to network file resources for 30 minutes.
For the Anti-Cryptor task to perform correctly, at least one of the services (Samba or NFS) must be installed on the operating system. For the NFS service, the rpcbind package must be installed.
The Anti-Cryptor task runs correctly with SMB1, SMB2, SMB3, NFS3, TCP/UDP, and IP/IPv6 protocols. Working with NFS2 and NFS4 protocols is not supported. We recommend to configure your server settings so that NFS2 and NFS4 protocols could not be used to mount resources.
The Anti-Cryptor task does not block access to network file resources until the host's activity is identified as malicious. So at least one file will be encrypted before the application detects a malicious activity.
Anti-Cryptor settings
Setting | Description |
|---|---|
Anti-Cryptor protection enabled / disabled | This toggle button enables or disables the protection of files in the local directories with network access by SMB/NFS protocols from remote malicious encrypting. This toggle button is switched off by default. |
Scan scope | Clicking the Configure scan scope link opens the Scan scope window. |
Untrusted hosts blocking enabled / disabled | This toggle button enables or disables blocking of the untrusted devices. This toggle button is switched on by default. |
Block untrusted host for (min) | This field lets you specify the time to block an untrusted host (in minutes). After the specified time is reached, Kaspersky Endpoint Security removes untrusted hosts from the list of blocked hosts. The access of the host to network file resources is restored automatically, after it is deleted from the list of untrusted hosts. If a compromised host is blocked and you change this setting value, the blocking time for this host will not change. The blocking time is not a dynamic value, and it is calculated at the moment of blocking. Available values: integer from Default value: |
Exclusions | Clicking the Configure exclusions link opens the Exclusions window. |
Exclusions by mask | Clicking the Configure exclusions by mask link opens the Exclusions by mask window. |
