Prevx Research Division
DLLHOSTS.EXE
Information StealerFree PC Cleanup from Webroot
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Associated Malware Groups
The filename is associated with the malware groups:
- Information Stealer
- Worm
- Malware Downloader
- Malicious Software
File Behavior
DLLHOSTS.EXE has been seen to perform the following behavior:
- Writes to another Process's Virtual Memory (Process Hijacking)
- This process creates other processes on disk
- Executes a Process
- Can communicate with other computer systems using HTTP protocols
- Injects code into other processes
- This Process Deletes Other Processes From Disk
- Found on infected systems and resists interrogation by security products
- The Process is packed and/or encrypted using a software packing process
- Executes Processes stored in Temporary Folders
- Registers a Dynamic Link Library File
DLLHOSTS.EXE has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Created as a process on disk
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Terminated as a Process
- Executed from Temporary Folders
- Deleted as a process from disk
- Registered as a Dynamic Link Library File
- This program is often downloaded from the web
- Created as a new Background Service on the machine
Country Of Origin
The filename DLLHOSTS.EXE was first seen on Oct 13 2007 in the following geographical regions of the Webroot community:
- Canada on Oct 13 2007
- Spain on Oct 13 2007
- Vietnam on Nov 19 2007
- France on Sep 2 2008
- Poland on Sep 2 2008
- Oman on Mar 19 2009
- Portugal on Jan 6 2010
- The United Kingdom on Jan 6 2010
- The United States on Feb 13 2010
- Belgium on Feb 13 2010
- Egypt on Mar 31 2010
- Italy on Apr 20 2012
File Name Aliases
DLLHOSTS.EXE can also use the following file names:
- ESTY1B[1].EXE
- ARCOTRAY.EXE
- ESTY1B.EXE
- DBASQLR[1].EXE
- NTEXPLORE.EXE
- DAUPDATE[1].EXE
- C2SYST[1].EXE
- FLTMCB.EXE
- ESTY1B_001.EXE
- SLSCV.EXE
- PRINTBRMUIA.EXE
- SYSTEMPROPERTIESPERFORMANCEB.EXE
- P2CSVC[1].EXE
- EACSND[1].EXE
- EMP_03.EXE
- INSTALL.EXE
- DLLHOSTS.EXE-VIR
- H2635S.EXE
- 48977762.EXE
- 70441945.EXE
Filesizes
The following file size has been seen:
- 311,578 bytes
- 53,248 bytes
- 121,856 bytes
- 188,416 bytes
- 479,232 bytes
- 51,712 bytes
- 225,280 bytes
- 36,864 bytes
File Type
The filename DLLHOSTS.EXE refers to many versions of an executable program.
File Activity
One or more files with the name DLLHOSTS.EXE creates, deletes, copies or moves the following files and folders:
- Deletes c:\windows\system32\dllhosts.exe
- Opens/modifes c:\autoexec.bat
- Creates c:\windows\system32\Monitored2.da
Network Activity
One or more files with the name DLLHOSTS.EXE performs the following network events:
- DNS Lookup38.99.70.224 mircomassi.no-ip.org
Website Activity
One or more files with the name DLLHOSTS.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- Port 80 IP:38.99.70.224
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