“acais.exe” is an application process that runs in the background on the machine. It is more or less an independent executable file, which does not need an external process to initiate it. This application process comes as a part of ACA 1.2 for Windows, which is a product of the company AhnLab, Inc.
There have been numerous discoveries of the acais.exe process and with different version numbers. Some of the version numbers that have been found recently are 1203, 1201 and 1205. Out of these, the most common occurrence is that of 1203, which is of a size of 23 kb approximately. Other versions of this service process exist in different sizes.
“acais.exe” bound to create and register a dll (Dynamic Link Library) file associated with the system processes. Since this runs as an independent background process, it is created, executed and terminated by itself. While being on execution, the files gets code entries from other programs and saves them to its own virtual memory space.
The process normally resides in one of the following two folders, “program files\ common files\ ahnlab\ aca” or “program files\ ahnlab\ aca”. Though this file resides in the parent installation directory of the ACA application, it serves to be a malware program since it does not come along with a legitimate certificate signed by a trusted windows source. These do not pose serious threats to the system or the information within the system. The process can be removed permanently from the system by using a proper anti spyware software.