Prevx Research Division
DR.EXE
Malware DropperFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Malware Dropper
- Internet Chat Worm
- Malicious Software
- Malware Downloader
File Behavior
DR.EXE has been seen to perform the following behavior:
- Downloads program file(s) and other content from the web
- Looks at the contents of the autoexec.bat file
- Reads email address and phone book details
- This process creates other processes on disk
- Enables an In Process Object/Server - Common with DLL Injections
- The Process is polymorphic and can change its structure
- The Process is packed and/or encrypted using a software packing process
- Executes a Process
- This Process Deletes Other Processes From Disk
DR.EXE has been the subject of the following behavior:
- Executed as a Process
- Deleted as a process from disk
- Copied to multiple locations on the system
- Created as a new Background Service on the machine
- Created as a process on disk
- Executed from Temporary Folders
- Registered as a Dynamic Link Library File
- 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 DR.EXE was first seen on May 19 2007 in the following geographical regions of the Webroot community:
- The United States on May 19 2007
- Netherlands on Jun 19 2007
- Uruguay on Aug 28 2008
- Georgia on Aug 28 2008
- Spain on Feb 11 2009
- Canada on Mar 5 2009
- Sweden on May 6 2010
- South Africa on May 17 2012
File Name Aliases
DR.EXE can also use the following file names:
- DT.EXE.EXE
- WMISYNC.EXE
- CQ.EXE.EXE
- DC.EXE.EXE
- JZ.EXE.EXE
- CD-DVD_DR.EXE
- DIRTY_REMOVER_V3(20080816)___BY___N0F3A6.EXE
- DR_BUY.EXE
- DR[1].EXE
- MW.EXE
- QI.EXE
- DT.EXE
- HW.EXE
- BJ.EXE
- GD.EXE
- DU.EXE
- HV.EXE
- NC.EXE
- FM.EXE
- OL.EXE
- PF.EXE
- OM.EXE
- DR_001.EXE
- 36198393.EXE
- 09620053.EXE
Filesizes
The following file size has been seen:
- 28,672 bytes
- 28,032 bytes
- 54,784 bytes
- 523,264 bytes
- 254,390 bytes
- 65,536 bytes
- 2,053,120 bytes
- 52,736 bytes
File Type
The filename DR.EXE refers to many versions of an executable program.
File Activity
One or more files with the name DR.EXE creates, deletes, copies or moves the following files and folders:
- Creates c:\documents and settings\user\local settings\application data\Clean.bat
- Creates c:\documents and settings\user\local settings\application data\dr.bat
- Creates c:\documents and settings\user\local settings\application data\Print.bat
- Creates c:\documents and settings\user\local settings\application data\TK.bat
- Creates c:\documents and settings\user\local settings\application data\end.vbs
- Creates c:\documents and settings\user\local settings\application data\start.vbs
- Creates c:\documents and settings\user\local settings\application data\Custom.bat
- Creates c:\documents and settings\user\local settings\application data\DirtyRemover.ini
- Creates c:\documents and settings\user\local settings\application data\UninstallDirtyRemover.bat
- Creates c:\documents and settings\user\local settings\application data\Help.htm
- Creates c:\docume~1\user\locals~1\temp\a05357.bat
- Deletes c:\docume~1\user\locals~1\temp\a05357.bat
- Deletes c:\documents and settings\user\local settings\application data\Clean.bat
- Deletes c:\documents and settings\user\local settings\application data\dr.bat
- Deletes c:\documents and settings\user\local settings\application data\Print.bat
- Deletes c:\documents and settings\user\local settings\application data\TK.bat
- Deletes c:\documents and settings\user\local settings\application data\end.vbs
- Deletes c:\documents and settings\user\local settings\application data\start.vbs
- Deletes c:\documents and settings\user\local settings\application data\Custom.bat
- Deletes c:\documents and settings\user\local settings\application data\DirtyRemover.ini
- Deletes c:\documents and settings\user\local settings\application data\UninstallDirtyRemover.bat
- Deletes c:\documents and settings\user\local settings\application data\Help.htm
- Creates c:\docume~1\user\locals~1\applic~1\cscript.exe
- Copies filec:\docume~1\user\locals~1\applic~1\DirtyRemover.ini to c:\DirtyRemover.ini
- Creates c:\Dirty_Remover_v3(20080816)___by___n0f3a6.log
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