Prevx Research Division
WINLOGN.EXE
System Back DoorFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- System Back Door
- Cloaked Malware
- Worm
- Malicious Software
File Behavior
WINLOGN.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- The Process is polymorphic and can change its structure
- This process creates other processes on disk
- Executes a Process
- Writes to another Process's Virtual Memory (Process Hijacking)
- This Process Deletes Other Processes From Disk
- Can make outbound communication to other computers, IM chat rooms and other services using IRC protocols
- Copies files
- Injects code into other processes
- Performs DNS look ups to resolve URL IP addresses
- Downloads program file(s) and other content from the web
- Sets processes to start during user logon
- This Process is a file infector which modifies program files to include a copy of the infection
- Creates new folders in the file system
- Enables an In Process Object/Server - Common with DLL Injections
- Reads email address and phone book details
WINLOGN.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
- Copied to multiple locations on the system
- Executed from Temporary Folders
Country Of Origin
The filename WINLOGN.EXE was first seen on Jul 8 2007 in the following geographical regions of the Webroot community:
- Europe on Jul 8 2007
- Spain on Jul 20 2007
- Germany on Jul 20 2007
- Pakistan on Jun 8 2008
- The United States on Feb 18 2009
- Mexico on Jan 26 2011
- The United Kingdom on Jan 26 2011
- South Africa on Jun 12 2011
- Turkey on Mar 5 2012
File Name Aliases
WINLOGN.EXE can also use the following file names:
- DVDRIP2009.AVI.EXE
- MP3RIP.MP3 .EXE
- EBOOKBYTHOR.PDF.EXE
- SETUP.EXE
- WINS.EXE
- RSVPS.EXE
- SMLOGSRVC.EXE
- 2.EXE
- TA.EXE
- DC170.EXE
- 31523984.EXE
- 73985639.DAT
Filesizes
The following file size has been seen:
- 622,592 bytes
- 35,526 bytes
- 200,669 bytes
- 45,568 bytes
- 25,289 bytes
- 8,520 bytes
- 638,976 bytes
- 456,874 bytes
File Type
The filename WINLOGN.EXE refers to many versions of an executable program.
File Activity
One or more files with the name WINLOGN.EXE creates, deletes, copies or moves the following files and folders:
- create folder C:\WINDOWS\system32\mp\
- create folder C:\WINDOWS\system32\do\
- create folder C:\WINDOWS\system32\vid\
- create folder C:\WINDOWS\system32\tm\
- Creates c:\windows\system32\mp\README.txt
- Copies filec:\windows\system32\winlogn.exe to c:\windows\system32\mp\mp3rip.mp3
- Copies filec:\windows\system32\winlogn.exe to c:\windows\system32\do\EbookBythor.pdf
- Creates c:\windows\system32\vid\README.txt
- Copies filec:\windows\system32\winlogn.exe to c:\windows\system32\vid\DvDrip2009.avi
- Creates c:\windows\system32\tm\EULA.rtf
- Creates c:\windows\system32\tm\Cd Key.txt
- Creates c:\windows\system32\tm\key.dat
- Copies filec:\windows\system32\winlogn.exe to c:\windows\system32\tm\Setup.exe
- Creates c:\docume~1\user\win.exe
- Copies filec:\docume~1\user\win.exe to c:\windows\system32\wsontfy.exe
- Creates c:\docume~1\user\locals~1\temp\dlx.exe
- Creates c:\docume~1\user\locals~1\temp\dlxx.exe
- Creates c:\docume~1\user\locals~1\temp\dlxxx.exe
- Deletes c:\docume~1\user\locals~1\temp\dlx.exe
- Deletes c:\docume~1\user\locals~1\temp\dlxx.exe
- Deletes c:\docume~1\user\locals~1\temp\dlxxx.exe
- create folder C:\WINDOWS\system32\oSN13
- Deletes c:\docume~1\user\locals~1\temp\nsn38.tmp
- Creates c:\windows\system32\MSINET.DEP
- Creates c:\windows\system32\MSINET.oca
- Creates c:\windows\system32\MSINET.OCX
- Creates c:\windows\system32\pac.txt
- Creates c:\windows\system32\osn13\oSN131084.exe
- Creates c:\docume~1\user\locals~1\temp\win.exe
- Creates c:\windows\system32\khfDtRHA.dll
- Creates c:\docume~1\user\locals~1\temp\urqPiGWQ.bat
- Deletes c:\windows\system32\winss.exe
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