Prevx Research Division
WINSYS.DLL
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Rootkit
- Cloaked Malware
File Behavior
WINSYS.DLL has been seen to perform the following behavior:
- Executes a Process
- This Process is a file infector which modifies program files to include a copy of the infection
- Registers a Dynamic Link Library File
- The Process is packed and/or encrypted using a software packing process
- Adds a Registry Key (DELAY) to auto start Programs on system start up
- Enables an In Process Object/Server - Common with DLL Injections
- Executes a Dynamic Link Library File as a process
- Can communicate with other computer systems using HTTP protocols
- Looks at the contents of the autoexec.bat file
- Reads email address and phone book details
- Opens browser pop ups
- Injects code into other processes
- This process creates other processes on disk
WINSYS.DLL has been the subject of the following behavior:
- Created as a new Background Service on the machine
- Registered as a Dynamic Link Library File
- Copied to multiple locations on the system
- Created as a process on disk
- Deleted as a process from disk
- Executed as a process
- Added as a Registry Key (DELAY) to auto start Programs on system start up
- Enabled as an In Process Object/Server - Common with DLL Injections
- Executed as a Process
- Created and Registered as a Browser Helper Object in Internet Explorer
Country Of Origin
The filename WINSYS.DLL was first seen on Dec 3 2007 in the following geographical regions of the Webroot community:
- Netherlands on Dec 3 2007
- New Zealand on Dec 3 2007
- on Mar 25 2008
- Spain on Feb 16 2009
- Ukraine on Mar 15 2009
- The United States on Aug 27 2009
- South Africa on Aug 17 2011
File Name Aliases
WINSYS.DLL can also use the following file names:
- SYSTEM32.DLL
- DLL281.DLL
- DLL312.DLL
- DLL718.DLL
- DLL140.DLL
- DLL234.DLL
- DLL250.DLL
- DLL890.DLL
- DLL859.DLL
- DLL500.DLL
- DLL750.DLL
- DLL953.DLL
- DLL375.DLL
- DLL968.DLL
- DLL578.DLL
- DLL609.DLL
- DLL343.DLL
- DLL812.DLL
- DLL453.DLL
- DLL796.DLL
- DLL359.DLL
- DLL843.DLL
- DLL734.DLL
- DLL937.DLL
- DLL656.DLL
- DLL328.DLL
- DLL765.DLL
- DLL406.DLL
- DLL171.DLL
- DLL296.DLL
- DLL921.DLL
- DLL671.DLL
- DLL781.DLL
- DLL703.DLL
- DLL62.DLL
- DLL187.DLL
- TTT.DLL
- WINSYS.OLD
- WINSYS.DLB
- 71648558.DLL
- 55756221.DLL
Filesizes
The following file size has been seen:
- 179,712 bytes
- 23,040 bytes
- 92,928 bytes
- 14,378 bytes
- 163,840 bytes
- 92,672 bytes
File Type
The filename WINSYS.DLL is used by multiple object types including Dynamic Link LIbraries,objects.
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