File Investigation Report
CALC.EXE
Cloaked MalwarePC Cleanup in 3 Easy Steps
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Associated Malware Groups
The unsafe files using this name are associated with the malware group:
- Cloaked Malware
File Behavior
CALC.EXE has been seen to perform the following behavior:
- Uses rootkit techniques to conceal its presence, interrogation or removal
- Found on infected systems and resists interrogation by security products
- Executes a Process
- The process hooks code into all running processes which could allow it to take control of the system or record keyboard input, mouse activity and screen contents
- Registers a Dynamic Link Library File
- Checks for the use of debuggers
- Opens browser pop ups
- Uses DNS to retrieve the IP address for web sites
- Uses your PC to connect to Chat rooms
- Copies files
- Creates system tray popups, messages, errors and security warnings
- Downloads program file(s) and other content from the web
- Modifies fixed, removable or USB drives using autorun to execute or spread infection
- Reads email address and phone book details
- Creates a new Background Service on the machine
- Looks at the contents of the autoexec.bat file
- Visits web sites on your PC without you knowing
- Includes file creation code which could be used to test for interception by security products
CALC.EXE has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Executed as a Process
- Created as a process on disk
- Deleted as a process from disk
- Has code inserted into its Virtual Memory space by other programs
- Executed by Internet Explorer
- Terminated as a Process
- Copied to multiple locations on the system
- Created by processes which appear to be checking for interception by security products
Country Of Origin
The filename CALC.EXE was first seen on May 3 2007 in the following geographical regions of the Prevx community:
- The EUROPEAN UNION on May 3 2007
- URUGUAY on May 3 2007
- ITALY on May 31 2007
- HUNGARY on Sep 30 2009
- NETHERLANDS on Sep 30 2009
- The UNITED STATES on Oct 5 2009
File Name Aliases
CALC.EXE can also use the following file names:
- TWAIN_X86.EXE
- MALCAL.EXE
- CSEDC.EXE
- MSCALC.EXE
- INSTANT-ACCESS.EXE
- CCVS.EXE
- DRQIGFRF.EXE
- CALCOLA.EXE
- CC.EXE
- IE.EXE
- YU.EXE
- TU.EXE
- LK.EXE
- RE.EXE
- RW.EXE
- JT.EXE
- YI.EXE
- IE8.EXE
- _DPTJNWPTBG-550.PMS.EXE
Filesizes
The following file size has been seen:
- 57,344 bytes
- 180,224 bytes
- 98,064 bytes
- 114,688 bytes
- 59,904 bytes
File Type
The filename CALC.EXE refers to many versions of an executable program.
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