Prevx Research Division
CONHOST.EXE
System Back DoorFree PC Cleanup from Webroot
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Associated Malware Groups
The filename is associated with the malware groups:
- System Back Door
- Cloaked Malware
File Behavior
CONHOST.EXE has been seen to perform the following behavior:
- Creates new folders on the system
- This process creates other processes on disk
- Injects code into other processes
- Performs DNS look ups to resolve URL IP addresses
- Adds a Registry Key (RUN) to auto start Programs on system start up
- Enables the system to use a Communications Proxy Server
- Executes Processes stored in Temporary Folders
- Writes to another Process's Virtual Memory (Process Hijacking)
- Can communicate with other computer systems using HTTP protocols
- This Process Deletes Other Processes From Disk
- Executes a Process
- Found on infected systems and resists interrogation by security products
- Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
- Registers a Dynamic Link Library File
- 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
CONHOST.EXE has been the subject of the following behavior:
- Changes to the file command map within the registry
- Deleted as a process from disk
- Created as a process on disk
- Added as a Registry auto start to load Program on Boot up
- Executed from Temporary Folders
- Has code inserted into its Virtual Memory space by other programs
- Executed as a Process
Country Of Origin
The filename CONHOST.EXE was first seen on Dec 7 2008 in the following geographical regions of the Webroot community:
- Spain on Dec 7 2008
- Indonesia on Dec 7 2008
- Canada on Aug 6 2010
- The United Kingdom on Dec 11 2010
- The United States on Dec 11 2010
- Chile on May 24 2012
File Name Aliases
CONHOST.EXE can also use the following file names:
- BWKPAZITATYLB[1].EXE
- PDFUPD.EXE
- 0.4038574512121824.EXE
- 0.8839319187570291.EXE
- 0.6513503780110419.EXE
- 0.973683494675681.EXE
- 50624.TMP.EXE
- 5061B.TMP.EXE
- 50637.TMP.EXE
- 50610.TMP.EXE
- 5069.TMP.EXE
- 5062D.TMP.EXE
- 50630.TMP.EXE
- 506876B.TMP.EXE
- 0.5747980224625031.EXE
- 0.5963522732555283.EXE
- 0.8070126055597184.EXE
- 13515781.EXE
- 03955449.EXE
- 87792242.EXE
- 30406758.EXE
- 81183151.DAT
Filesizes
The following file size has been seen:
- 98,304 bytes
- 123,904 bytes
- 503,403 bytes
- 183,296 bytes
- 124,416 bytes
- 273,408 bytes
- 310,272 bytes
- 174,080 bytes
File Type
The filename CONHOST.EXE is used by multiple object types including executable programs,objects.
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