Prevx Research Division
20.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
- Malicious Software
File Behavior
20.EXE has been seen to perform the following behavior:
- This process creates other processes on disk
- Enables an In Process Object/Server - Common with DLL Injections
- Creation and Registers a Browser Helper Object in Internet Explorer
- Adds a Registry Key (RUN) to auto start Programs on system start up
- Executes a Process
- Writes to another Process's Virtual Memory (Process Hijacking)
- Can communicate with other computer systems using HTTP protocols
- This Process Deletes Other Processes From Disk
- Registers a Dynamic Link Library File
- Creates new folders in the file system
- Uses DNS to retrieve the IP address for web sites
- The Process is packed and/or encrypted using a software packing process
20.EXE has been the subject of the following behavior:
- Executed from Temporary Folders
- Created as a process on disk
- Terminated as a Process
- Executed as a Process
- Deleted as a process from disk
Country Of Origin
The filename 20.EXE was first seen on Jun 13 2007 in the following geographical regions of the Webroot community:
- on Jun 13 2007
- Vietnam on Mar 14 2008
- The United States on Sep 11 2008
- The United Kingdom on Sep 11 2008
- Pakistan on Oct 15 2008
- Turkey on May 23 2012
File Name Aliases
20.EXE can also use the following file names:
- 20[1].EXE
- 20[2].EXE
- 23.EXE
- 25.EXE
- 6D.EXE
- 77.EXE
- S1A4
Filesizes
The following file size has been seen:
- 163,858 bytes
- 2,353,015 bytes
- 94,965 bytes
- 24,926,056 bytes
- 491,008 bytes
- 13,488 bytes
- 6,235,552 bytes
File Type
The filename 20.EXE refers to many versions of an executable program.
File Activity
One or more files with the name 20.EXE creates, deletes, copies or moves the following files and folders:
- Deletes c:\windows\system32\rsqq.dll
- Deletes c:\docume~1\user\locals~1\temp\tmp9.tmp
- Moves c:\windows\system32\rsqq.dll to c:\docume~1\user\locals~1\temp\tmp9.tmp
- Creates c:\windows\system32\rsqq.dll
- Deletes c:\windows\system32\mseion.sys
- Deletes c:\windows\system32\drivers\mselk.sys
- Creates c:\docume~1\user\locals~1\temp\9b33_appcompat.txt
- Creates c:\docume~1\user\locals~1\temp\1A061.dmp
- Opens/modifes c:\autoexec.bat
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