Prevx Research Division
INST.EXE
Malware DropperFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Malware Dropper
- Malicious Software
File Behavior
INST.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Adds a Registry Key (RUN) to auto start Programs on system start up
- Adds products to the system registry
- This process creates other processes on disk
- Writes to another Process's Virtual Memory (Process Hijacking)
- Executes a Process
- Can communicate with other computer systems using HTTP protocols
- 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
- Creates new folders on the system
- Injects code into other processes
- This Process Deletes Other Processes From Disk
- Performs DNS look ups to resolve URL IP addresses
- Found on infected systems and resists interrogation by security products
INST.EXE has been the subject of the following behavior:
- Created as a process on disk
- Executed as a Process
- Added as a Registry auto start to load Program on Boot up
- Has code inserted into its Virtual Memory space by other programs
- Deleted as a process from disk
- Terminated as a Process
- Registered as a Dynamic Link Library File
- Executed from Temporary Folders
Country Of Origin
The filename INST.EXE was first seen on May 8 2007 in the following geographical regions of the Webroot community:
- The United States on May 8 2007
- Vietnam on Nov 22 2009
- South Africa on Nov 22 2009
- Italy on Apr 1 2010
- The United Kingdom on May 11 2010
- Czech Republic on Jan 21 2011
- Turkey on May 24 2012
File Name Aliases
INST.EXE can also use the following file names:
- WINMATE.EXE
- WINMATE0.8.3(DESCUBRA O QUE DEIXA O SEU COMPUTADOR DEVAGAR E ELIMINE A CAUSA DO PROBLEMA).EXE
- WINMATE 8 2.EXE
- WIN PROBLEM INST.EXE
- WINMATE 0.8.6.EXE
- WINMATE091.EXE
- INST(1).EXE
- INST-1.EXE
- WINMATE INST.EXE
- WINMATE_0.9.14.EXE
- INST (1).EXE
- T55 WIN MATE SETUP.EXE
- WINMATEINST.EXE
- WINMATE_0.9.14[1].EXE
- INST[1].EXE
- NEWFILE.TMP
- TRANSLATER_WEOHGAAGQW.EXE
- XXX_VIDEO_098787.EXE
- 91_188_60_147[1].EXE
- DC22.EXE
- 75591462.EXE
- 14203712.EXE
Filesizes
The following file size has been seen:
- 262,144 bytes
- 628,224 bytes
- 900,624 bytes
- 349,560 bytes
- 328,992 bytes
- 1,017,360 bytes
- 160,336 bytes
File Type
The filename INST.EXE refers to many versions of an executable program.
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