If you see "App.exe" in your task manager, it may not always be malware. If you are using the Smartfren SIM (CDMA) card with a USB wifi modem, then App.exe is most likely the Smartfren Connex Ac682 UI (user interface).
This is a telephone service in Indonesia only as far as I know (www.smartfren.com) that includes both Internet and mobile phone services.
If you haven't somehow set the UI to run at startup, and you haven't manually started it from the start menu or an icon on your desktop, etc., but you still find "App.exe" in your task manager processes list, switch to the Applications tab. If you see "Smartfren Connex AC682 UI", then it's a pretty sure bet it's that program instead of a virus. You can confirm this by right-clicking on the "Smartfren Connex AC682 UI" on the application tab and selecting "Go to process", which will move you to the processes tab and highlight the process. If you notice TWO incidences of "App.exe," then the one that "Go to process" doesn't lead you to is suspect.
Another way to check to see if the UI is active is to check the toolbar. If you don't see it listed in the buttons with the other programs, and it isn't shown in the icons of programs running in the background near the clock, and you've already checked the task manager, you should be suspicious.
If you're not a Smartfren user, then this process is suspect.
I hope this info is of value and I apologize if I've incorrectly placed this post.
Edited by hamluis, 16 November 2011 - 03:51 PM.
Added emphasis. Moved from All Other Applications to