Prevx Research Division
COMBOFIX[n].EXE
Suspicious SoftwareIt is possible that your PC could be infected. The file name COMBOFIX[n].EXE is used by both safe and unsafe programs.
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File Behavior
COMBOFIX[n].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
- Executes a Process
- Creates system tray popups, messages, errors and security warnings
- Found on infected systems and resists interrogation by security products
- Uses low level functions to hide itself from the user and from system/security processes
- Adds products to the system registry
- Writes to another Process's Virtual Memory (Process Hijacking)
- This Process Deletes Other Processes From Disk
- Uses rootkit techniques to conceal its presence, interrogation or removal
COMBOFIX[n].EXE has been the subject of the following behavior:
- Deleted as a process from disk
- Created as a process on disk
- Executed as a Process
- Created by processes which appear to be checking for interception by security products
- Terminated as a Process
- Has code inserted into its Virtual Memory space by other programs
- Executed by Internet Explorer
Country Of Origin
The filename COMBOFIX[n].EXE was first seen on Jun 27 2007 in the following geographical regions of the Webroot community:
- on Jun 27 2007
- Italy on Jun 27 2007
- Brazil on Jul 7 2007
- Germany on Jul 7 2007
- Israel on Jan 25 2008
- Spain on Jul 6 2008
- Poland on Sep 3 2008
- Singapore on Apr 4 2009
- The United States on Aug 10 2011
File Name Aliases
COMBOFIX[n].EXE can also use the following file names:
- COM.EXE
- QWE.EXE
- ARC.EXE
- تنظيفCOMBOFIX.EXE
- COMBOFIX AL CAN1M BUDA BENDEN SANA HEDIYE VIRüSLERI TEMIZLEMEDE BANA çOK YARD1MC1 OLDU LAZ1M OLUR SILME.EXE
- CHOMB.EXE
- ONECARE.EXE
- BLEH.EXE
- VIRUS.EXE
- ALPHA.EXE.EXE
- ERTY.EXE
- ABC.EXE
- MOI.EXE
- COMBOFIX1.EXE
- SOMTHING.EXE
- KJT.EXE
- PLOP.EXE
- ABCD.EXE.EXE
- UHYGN.EXE
- PROVA.EXE.EXE
- COMBOFIX.EXE.EXE
- COMBOFIX2.EXE
- ASDLFKASJDF.EXE
- QWEW.EXE
- KJHGKDJKAJHGHGDSLSFHZFG.EXE
- ABCD.EXE
- CIAOCIAO.EXE
- FIX.EXE
- COMBOFIX(n).EXE
- COMBO-FIX.EXE
- COMBOFIX.EXE
- PROVA.EXE
- COMBOFIXS.EXE
- JFGUGJY.EXE
- O3SUDKLT.EXE
- COMBOFIX[1].EXE
- CF.EXE
- 8DDKPS5N.EXE
- DD69.EXE
- DD1.EXE
Filesizes
The following file size has been seen:
- 3,854,195 bytes
- 1,981,576 bytes
- 3,067,803 bytes
- 809,932 bytes
- 1,568,123 bytes
- 1,118,993 bytes
- 1,092,095 bytes
File Type
The filename COMBOFIX[n].EXE is used by multiple object types including self extracting compressed files,executable programs.
File Activity
One or more files with the name COMBOFIX[n].EXE creates, deletes, copies or moves the following files and folders:
- Deletes c:\327882r2fwjfw\temp00.bat
- Copies filec:\windows\system32\findstr.exe to findstr.cfe
- Copies filec:\windows\system32\attrib.exe to attrib.cfe
- Copies filec:\windows\system32\cmd.exe to c:\windows\system32\CF21246.exe
- Deletes c:\327882r2fwjfw\NirCmd.inf
- Deletes c:\327882r2fwjfw\FileName
- Deletes c:\327882r2fwjfw\DIRNAM~1
- Deletes c:\Start_.cmd
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