Prevx Research Division
CALC[1].EXE
System Back DoorFree PC Cleanup from Webroot
Use Webroot SecureAnywhere to remove CALC[1].EXE.
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Associated Malware Groups
The filename is associated with the malware groups:
- System Back Door
- Malware Dropper
File Behavior
CALC[1].EXE has been seen to perform the following behavior:
- Executes a Process
- This process creates other processes on disk
- Creates new folders on the system
- This Process Deletes Other Processes From Disk
- Creates or uses a background service to access the Internet using HTTP protocols
- Injects code into other processes
- Performs DNS look ups to resolve URL IP addresses
- The Process is packed and/or encrypted using a software packing process
- Writes to another Process's Virtual Memory (Process Hijacking)
- Terminates Processes
- Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
- Adds products to the system registry
- Can communicate with other computer systems using HTTP protocols
- Executes Processes stored in Temporary Folders
CALC[1].EXE has been the subject of the following behavior:
- Executed as a Process
- Created as a process on disk
- Deleted as a process from disk
- Executed by Internet Explorer
- Has code inserted into its Virtual Memory space by other programs
- Created as a new Background Service on the machine
Country Of Origin
The filename CALC[1].EXE was first seen on Sep 21 2007 in the following geographical regions of the Webroot community:
- Europe on Sep 21 2007
- Italy on Sep 21 2007
- Denmark on Sep 28 2007
- Hong Kong on Aug 20 2008
- The United States on May 15 2010
- South Africa on May 15 2010
- The United Kingdom on Feb 17 2011
- Poland on May 9 2011
- Germany on Aug 2 2011
- Thailand on May 23 2012
File Name Aliases
CALC[1].EXE can also use the following file names:
- GJNO.EXE
- KETONNEKER.EXE
- ABOUT[1].EXE
- SYSORLQ.EXE
- SYSNWFC.EXE
- JAR_CACHE5272532853435878924.TMP
- NULL0.2847035768729921.EXE
- TEST.EXE
- INFO[1].EXE
- NULL0.8302835197838684.EXE
- NULL0.3771096939584563.EXE
- NULL0.901488230970312.EXE
- NULL0.5766814576407618.EXE
- ADOBEUPDATE.EXE
- CONTACTS[1].EXE
- NULL0.35227604062059725.EXE
- NULL0.6713060492428674.EXE
- NULL0.39394041405449975.EXE
- NULL0.5572670165531939.EXE
- NULL0.627774933424869.EXE
- NULL0.9388312160458531.EXE
- NULL0.4581053769536184.EXE
- NULL5.735808752722615E-4.EXE
- NULL0.246403743962177.EXE
- NULL0.7271311013812364.EXE
- NULL0.7619745360201954.EXE
- NULL0.3135368972618304.EXE
- NULL0.13156961799281852.EXE
- NULL0.7675210376992097.EXE
- NULL0.8720684366029737.EXE
- NULL0.5528939227791709.EXE
- NULL0.8291580536086246.EXE
- NULL0.10984695769186148.EXE
- README[1].EXE
- CONTACTS (1).EXE
- SYSSISV.EXE
- _1.TMP
- _1304.TMP
- 274.EXE
- 289.EXE
- 070.EXE
- 571.EXE
- 62005702.TMP
Filesizes
The following file size has been seen:
- 59,392 bytes
- 457,216 bytes
- 8,192 bytes
- 282,624 bytes
- 93,696 bytes
- 577,024 bytes
- 233,259 bytes
- 38,400 bytes
File Type
The filename CALC[1].EXE refers to many versions of an executable program.
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