AR.EXE

File Behavior

AR.EXE has been seen to perform the following behavior:

• The Process is packed and/or encrypted using a software packing process
• This process creates other processes on disk
• Writes to another Process's Virtual Memory (Process Hijacking)
• Violates Windows/Vista Physical Memory Protection allowing it to look inside the data areas of other programs
• This Process Deletes Other Processes From Disk
• Injects code into other processes
• Adds a Registry Key (RUN) to auto start Programs on system start up
• Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
• Executes a Process
• Copies files
• Downloads hidden code from covert web sites
• This Process is a file infector which modifies program files to include a copy of the infection
• Checks for the use of debuggers
• Sets processes to start during user logon
• Creates a new Background Service on the machine
• Reads email address and phone book details
• Includes file creation code which could be used to test for interception by security products
• Visits web sites on your PC without you knowing
• Creates, modifies or schedules batch jobs
• Can make outbound communication to other computers, IM chat rooms and other services using IRC protocols
• Drops known malicious software during execution
• Modifies fixed, removable or USB drives using autorun to execute or spread infection

AR.EXE has been the subject of the following behavior:

• Executed as a Process
• Executed from Temporary Folders
• Created as a process on disk
• Has code inserted into its Virtual Memory space by other programs
• Deleted as a process from disk
• Copied to multiple locations on the system
• Added as a Registry auto start to load Program on Boot up
• This program is often downloaded from the web
• Created by processes which appear to be checking for interception by security products