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#COMODO ANTIVIRUS ADVANCED ARCHIVE#
#COMODO ANTIVIRUS ADVANCED CODE#
#COMODO ANTIVIRUS ADVANCED DOWNLOAD#
#COMODO ANTIVIRUS ADVANCED WINDOWS#

If the validation passes, it writes it to disk.

Downloads the payload and validates it by checking for the presence of the signature (included in the configuration block) in its data.

Then, HijackLoader locates the encrypted payload URL and decrypts it using a bitwise XOR operation.

Parses the decrypted configuration block, which was obtained from the initialization phase.

HijackLoader locates the payload of the second stage (i.e., the ti module) by following the steps below: Table 1 - HijackLoader blocklist of processes PROCESS NAME In Table 1, we summarize the corresponding functionality for each process. Depending on which ones are present, it executes different functionality.

The first stager checks for the presence of a set of running processes.

#COMODO ANTIVIRUS ADVANCED CODE#

Delaying of code execution at different stages.If a connection cannot be made, then HijackLoader does not proceed with the execution and enters an infinite loop until a connection is made. Performing an HTTP connectivity test to a legitimate website (e.g.

#COMODO ANTIVIRUS ADVANCED WINDOWS#

Dynamic loading of Windows API functions by leveraging a custom API hashing technique.The first stage includes a limited set of evasion techniques: The offsets for the configuration block detection (including the offset of the encryption key) might differ from sample to sample. The above configuration block is detected by using hardcoded offsets and then decrypted either with a bitwise XOR or ADD operation. A blocklist of process name hashes (described later in Table 1).An offset for the payload URL (if any) along with an XOR key to decrypt it.A DWORD value, which is used for detecting all blobs of the encrypted payload.A DWORD value, which is used for validating the payload, when loaded from disk, by searching it in the payload’s data.

A DWORD seed value, which is used for deriving a string based on the compromised host’s username.

For example, the constant PAGE_EXECUTE_READWRITE (0x40) for VirtualProtect.

Parameters for several Windows API functions.

The offsets for these fields might differ from sample to sample.

#COMODO ANTIVIRUS ADVANCED DOWNLOAD#

An array of DWORDs, which are used to determine if the loader has to download the final payload.

Windows API hashes for dynamic loading.

A DWORD hash value to detect the next stage (e.g., the ti module described later in the text) from the modules table.To achieve this, HijackLoader includes an encrypted configuration, which stores information such as: To restore the default 'Anti-virus Advanced Settings' value, click the 'Default' button.Upon execution, HijackLoader starts by executing a modified (hooked) function of the Windows C Runtime (CRT), which points to the entry point of the first stage.ĭuring its initialization phase, the loader determines if the final payload has been embedded in the binary or if it needs to download it from an external server.Management' for more details about profile settings. The types of mail that should be archived and their related settings are configured in profile settings. If enabled, archived mails will also be scanned. If enabled, AV scanner checks for emails that Quarantined mails can beĪccessed by users through the webmail interface. Will place phishing emails in quarantine. You can reject or accept invalid recipients. If enabled, AV scanner checks for phishing email signature. Archived files are scanned till the Antivirus scanner reaches the set value. Maximum amount of data (specified value set) scanned for each input file.

#COMODO ANTIVIRUS ADVANCED ARCHIVE#

Maximum number of files that can be scanned within an archive or email. If an archive contains more than this threshold then the attachment will be blocked. Maximum number of sub-directories or nested archives that will be scanned. The AV scanning time in seconds for an email. The maximum number of email threads in a email (message + attachments) that should be scanned. Note that if the maximum size is surpassed then the antivirus filterįor the particular email will not be applied. The the max size of email+attachments that should be scanned. 'Advanced Settings' screen lets you configure granular settings like 'Modules' > ' 'Anti-virus' > 'Advanced Settings' to open this

Secure Email Gateway SMTP AUTH Connector.

Introduction To Comodo Secure Email Gateway.