Prevx Research Division
AUTOCHK.DLL
RootkitFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Rootkit
- Fraudulent Security Program
- Cloaked Malware
- Worm
File Behavior
AUTOCHK.DLL has been seen to perform the following behavior:
- This process creates other processes on disk
- This Process Deletes Other Processes From Disk
- This Process is a file infector which modifies program files to include a copy of the infection
- 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
- The Process is packed and/or encrypted using a software packing process
- Registers a Dynamic Link Library File
AUTOCHK.DLL has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Registered as a Dynamic Link Library File
- Created as a process on disk
- The process is hooked into all running processes which could allow it to take control of the system or record keyboard input, mouse activity and screen contents
- Executed as a Process
- Added as a Link in the Start Menu
- Deleted as a process from disk
- Deleted as a Link in the Start Menu
Country Of Origin
The filename AUTOCHK.DLL was first seen on Aug 2 2008 in the following geographical regions of the Webroot community:
- on Aug 2 2008
- Netherlands on Jan 25 2009
- The United States on Jan 25 2009
- Spain on May 6 2009
- Canada on May 28 2009
- Singapore on May 29 2009
- Europe on Sep 10 2009
File Name Aliases
AUTOCHK.DLL can also use the following file name:
- MSB.DLL
- PROTECT.DLL
- CHKDISK.DLL
- BACKUP-20090529-182527-619-CHKDISK.DLL
- AUTOCHK.DLL.REN
- RUNDLL32.DLL
- BACKUP-20090910-185346-297-CHKDISK.DLL
- BACKUP-20090911-081838-982-CHKDISK.DLL
- BACKUP-20090910-185422-430-CHKDISK.DLL
- BACKUP-20090910-183246-775-CHKDISK.DLL
- BACKUP-20090911-081906-880-CHKDISK.DLL
- BACKUP-20090910-183510-894-CHKDISK.DLL
- BACKUP-20090911-075840-942-CHKDISK.DLL
- BACKUP-20090911-082414-884-CHKDISK.DLL
- BACKUP-20090911-082624-196-CHKDISK.DLL
- BACKUP-20090911-013121-990-CHKDISK.DLL
- BACKUP-20090911-015424-197-CHKDISK.DLL
- BACKUP-20090911-015547-635-CHKDISK.DLL
- BACKUP-20090911-021010-247-CHKDISK.DLL
- BACKUP-20090911-015622-378-CHKDISK.DLL
- BACKUP-20090911-081415-290-CHKDISK.DLL
- UPDATE.DLL
- MS.DLL
Filesizes
The following file size has been seen:
- 40,960 bytes
- 24,064 bytes
- 20,992 bytes
- 22,016 bytes
- 21,504 bytes
- 25,600 bytes
- 26,112 bytes
- 103,640 bytes
File Type
The filename AUTOCHK.DLL refers to many versions of a dynamic link library.
File Activity
One or more files with the name AUTOCHK.DLL creates, deletes, copies or moves the following files and folders:
- Creates c:\documents and settings\user\start menu\programs\startup\ChkDisk.lnk
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