Comodo Client Security 12.4

Miscellaneous Settings

Click 'Settings' > 'Advanced Protection' > 'Miscellaneous'

The miscellaneous settings panel lets you:

Configure protection against shellcode injections (buffer overflow attacks)

Skip automatic cleanup of suspicious certificates.

Configure protection settings for auto-start entries and scheduled tasks

Open 'Miscellaneous' settings:

Click 'Settings' on the CCS home screen

Click 'Advanced Protection' > 'Miscellaneous'

This interface allows you to:

Disable shellcode injection detection for certain applications

Skip automatic clean-up of suspicious certificate

Define actions to be taken on unrecognized auto-start entries/scheduled task

Specify the signature level for monitoring processes launched and DLL's loaded during system start-up

Enable or disable monitoring DLL files loaded to memory by currently running processes

Disable shellcode injection detection

By default, protection against shellcode injection is enabled for all applications on your computer. Use this setting to define applications which you do not want to monitor for shellcode injections.

Background:

Shellcode injection is a malicious technique which allows an attacker to cause a buffer overflow on your system.
A buffer is an area of memory designed to hold a specific amount of data. A buffer overflow occurs when a process stores data beyond the boundaries of this fixed-length buffer.
The result is that the extra data overwrites adjacent memory locations. The overwritten data may include other buffers, variables and program flow data.
Malware can deliberately cause buffer overflows in order to run malicious code or make the program operate incorrectly.

Exclude certain applications from shellcode injection protection

Make sure 'Don't detect shellcode injections in these applications' is enabled then click the 'these applications' link. The 'Manage Exclusions' dialog appears.

Click the 'Add' button at the top

You can add items by selecting the required option from the drop-down:

File Groups - Select a category of pre-set files or folders. For example, 'Executables' lets you create a ruleset for all files with the extensions .exe .dll .sys .ocx .bat .pif .scr .cpl, *cmd.exe *.bat, *.cmd. Other categories available include 'Windows System Applications', 'Windows Updater Applications', 'Start Up Folders' etc. See File Groups for more details on file groups.

Running Processes - Select an application or executable from the processes that are currently running on your PC.

Folders - Specify a folder on your computer to include all files in the folder to the exclusions.

Files - Select a specific executable file you wish to add to the exclusions.

Click 'OK' to implement your settings.

Do not automatically cleanup suspicious certificates

Choose whether or not to delete any root certificates that were not signed by a trusted certificate authority

By default, CCS warns you if any fake root certificates are found in your browsers but does not delete them

Disable this option if you want CCS to delete those fake certificates whenever they are found

Background:

SSL certificates are used by websites to encrypt the connection between your browser and their web-server.

This ensures nobody can intercept the traffic sent between you and the site. All information sent from your browser to the site is private. This is especially important for sensitive transactions like online payments, where you send your credit card information over the internet.

You can tell a site is using an SSL certificate by the padlock icon in the browser address bar.

SSL certificates are issued to website owners by an organization known as a ‘Certificate Authority’ (CA). The CA checks that the applicant owns the website in question, and is a legitimate business.

Once these checks have been passed, the CA will sign the applicant’s certificate with what is known as a ‘root certificate’. You should only trust websites whose certificates have been signed by the root certificate of a trusted CA.

These trusted root certificates are embedded in your browser (Firefox, Chrome, Edge etc). Your browser checks that the SSL certificate on a site is signed by a trusted root each and every time you visit the site.

A fake root certificate would, therefore, bypass this check of legitimacy. It could tell you to trust a website run by a hacker.

CCS can detect and remove fake root certificates from the endpoint during on-demand and scheduled scans. Disable 'Do not automatically cleanup suspicious certificates' to activate this feature.

Define actions to be taken on unrecognized auto-start entries/scheduled tasks

Apply the selected action to unrecognized autorun entries related to new / modified registry items - Specify what CCS should do if applications added to Scrip Analysis > Autoruns Scans try to create or modify one of the following registry items:

Windows services

Auto-start entries

Scheduled tasks

The available options are:

Ignore - CCS does not take any action (Default)

Terminate - CCS stops the process / service

Terminate and Disable - Auto-run processes are stopped and the corresponding auto-run entry removed. In the case of a service, CCS disables the service

Quarantine and Disable - The application is quarantined and the corresponding auto-start entry is removed. In the case of a service, CCS disables the service.

Background:

CCS can perform heuristic command-line analysis and embedded code detection in order to protect Windows services, autostart items and scheduled tasks

CCS ships with a list of predefined applications for which it performs heuristic analysis on programs that are capable of executing code

You can also add programs for which you want CCS to perform heuristics analysis in 'Settings' > 'Advanced Protection' > 'Script Analysis' > 'Autoruns Scan'. See Autoruns Scans in Script Analysis Settings for more details on this

Monitor processes and DLLs loaded atstart up:

You can instruct CCS to identify untrusted DLLs, apps, portable executables (PE) and autoruns launched before CCS starts on the endpoint. These may expose the endpoint to a danger if those items turn to be malicious.

By default, CCS does not monitor these items.

CCS checks whether startup items are signed by a trusted authority and marks them as trusted or untrusted. The flag is used at next restart to allow or block the item.

Apply the selected signature level...loaded on early system start - Choose how strict the certificate check should be:

Microsoft- Only items signed by Microsoft certificates are marked as trusted

Antimalware - Trusts files signed by either Microsoft or Antimalware certificates

Authenticode - Flags all signed files as trusted

Monitor DLL files loaded by currently running processes

By default, CCS does not monitor the DLL files loaded to system memory, by processes that are currently running on the endpoint.

Monitor DLL files being loaded by running processes - If enabled, CCS runs a file rating scan on each DLL loaded to identify its trust rating.

The trust rating is reported to Endpoint Manager and added to local logs. Files with an Unrecognized' rating are submitted to Valkyrie for analysis.

You can view these details at 'Security Sub-Systems' > 'Application Control'.

https://help.comodo.com/topic-399-1-786-10102-Manage-File-Trust-Ratings-on-Windows-Devices.html for more details.

Click 'OK' to save your settings.

Advanced Endpoint Protection

Comodo Client Security 12.15

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Miscellaneous Settings