Prevx Research Division
XZ.EXE
Malicious SoftwareFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware group:
- Malicious Software
File Behavior
XZ.EXE has been seen to perform the following behavior:
- Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
- Executes a Process
- This Process Deletes Other Processes From Disk
- Copies files
- This process creates other processes on disk
- Registers a Dynamic Link Library File
- Downloads program file(s) and other content from the web
- Injects code into other processes
- Performs DNS look ups to resolve URL IP addresses
- Creates new folders on the system
- Enables an In Process Object/Server - Common with DLL Injections
- Can communicate with other computer systems using HTTP protocols
- Writes to another Process's Virtual Memory (Process Hijacking)
- Looks at the contents of the autoexec.bat file
- Reads email address and phone book details
XZ.EXE has been the subject of the following behavior:
- Created as a process on disk
- This program is often downloaded from the web
- Executed as a Process
- Deleted as a process from disk
- Copied to multiple locations on the system
- Added as a Registry auto start to load Program on Boot up
- Has code inserted into its Virtual Memory space by other programs
Country Of Origin
The filename XZ.EXE was first seen on May 9 2007 in the following geographical regions of the Webroot community:
- The United States on May 9 2007
- on May 31 2008
- Spain on May 31 2008
- Philippines on Oct 6 2008
- Kenya on Apr 11 2010
- India on Apr 18 2012
Filesizes
The following file size has been seen:
- 113,152 bytes
- 28,672 bytes
- 186,523 bytes
- 116,224 bytes
- 7,799,808 bytes
File Type
The filename XZ.EXE is used by multiple object types including executable programs,objects.
File Activity
One or more files with the name XZ.EXE creates, deletes, copies or moves the following files and folders:
- Opens/modifes c:\autoexec.bat
- Creates c:\windows\system\xz.exe
- Deletes c:\windows\system32\VerClsid.exe
- Creates c:\docume~1\user\locals~1\temp\1ow.dll
- Deletes c:\w1.hiv
- Deletes c:\w2.hiv
- Creates c:\docume~1\user\locals~1\temp\$dfgb4gh4d.bat
- Deletes c:\windows\system\1.exe
- Deletes c:\docume~1\user\locals~1\temp\$DFGB4~1.BAT
Website Activity
One or more files with the name XZ.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- TCP:127.0.0.1:1094 Port:17
- Port 80 IP:218.57.8.144
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