Prevx Research Division
SIINST.EXE
Cloaked MalwareIt is possible that your PC could be infected. The file name SIINST.EXE is used by both safe and unsafe programs.
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Associated Malware Groups
The unsafe files using this name are associated with the malware group:
- Cloaked Malware
File Behavior
SIINST.EXE has been seen to perform the following behavior:
- Executes Processes stored in Temporary Folders
- Creates system tray popups, messages, errors and security warnings
- The Process is polymorphic and can change its structure
- Writes to another Process's Virtual Memory (Process Hijacking)
- Executes a Process
SIINST.EXE has been the subject of the following behavior:
- Has code inserted into its Virtual Memory space by other programs
- Executed as a Process
- Created as a process on disk
- Deleted as a process from disk
- Executed by Internet Explorer
- Executed from Temporary Folders
- Terminated as a Process
Country Of Origin
The filename SIINST.EXE was first seen on Mar 27 2008 in the following geographical regions of the Webroot community:
- Spain on Mar 27 2008
- Europe on Mar 27 2008
- Mexico on May 13 2008
- New Zealand on May 13 2008
- on Jul 31 2008
- Brazil on Jul 31 2008
- The United Kingdom on Nov 26 2008
- The United States on Feb 15 2011
- Hungary on Jan 31 2012
File Name Aliases
SIINST.EXE can also use the following file names:
- SIINST[n].EXE
- SIINST(n).EXE
- SIINST(1).EXE
- SIINST[1].EXE
- FSM160.TMP
- FSMF4B0.TMP
- FSM567.TMP
- FSM4E.TMP
- SIINST[2].EXE
- FSMDE.TMP
- SOFTWARETOINFORMYOUUPDATEST.EXE
- SOFTWAREINVORMERNEU.EXE
- SID9DC.EXE
- SIE8.EXE
- MYOBE 17.EXE
- JAVA (TM) UPDATE 18.EXE
- SI12A1.EXE
- FREE D
- SI5.EXE
Filesizes
The following file size has been seen:
- 665,724 bytes
- 574,964 bytes
- 655,551 bytes
- 990,119 bytes
- 1,024,982 bytes
- 653,350 bytes
File Type
The filename SIINST.EXE refers to many versions of an executable program.
File Activity
One or more files with the name SIINST.EXE creates, deletes, copies or moves the following files and folders:
- Creates c:\docume~1\user\locals~1\temp\is-3ehoc.tmp\is-QC704.tmp
- Creates c:\docume~1\user\locals~1\temp\is-mfsdd.tmp\_isetup\_RegDLL.tmp
- Creates c:\docume~1\user\locals~1\temp\is-mfsdd.tmp\_isetup\_shfoldr.dll
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