Prevx Research Division
8C.TMP
Cloaked MalwareFree PC Cleanup from Webroot
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Associated Malware Groups
The filename is associated with the malware groups:
- Cloaked Malware
- Malware Dropper
- Malicious Software
File Behavior
8C.TMP has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- This Process Deletes Other Processes From Disk
- Executes a Process
- Writes to another Process's Virtual Memory (Process Hijacking)
- This process creates other processes on disk
- Looks at the contents of the autoexec.bat file
- Reads email address and phone book details
- Uses DNS to retrieve the IP address for web sites
- Found on infected systems and resists interrogation by security products
- Disables the built in Windows File Protection System
- Copies files
- Injects code into other processes
- Uses functions common to keyboard loggers, screen or form grabbers, and information stealers
- Creation and Registers a Browser Helper Object in Internet Explorer
- Adds a Registry Key (EXPLORER) to auto start Programs on system start Boot up
- Creates a new Background Service on the machine
8C.TMP has been the subject of the following behavior:
- Created as a new Background Service on the machine
- Added as a Registry auto start to load Program on Boot up
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Created as a process on disk
- Copied to multiple locations on the system
- Registered as a Dynamic Link Library File
- Deleted as a process from disk
Country Of Origin
The filename 8C.TMP was first seen on Feb 24 2008 in the following geographical regions of the Webroot community:
- Ukraine on Feb 24 2008
- China on Apr 16 2008
- Spain on Apr 16 2008
- Canada on Aug 19 2008
- The United States on May 29 2009
- Turkey on Jun 25 2010
File Name Aliases
8C.TMP can also use the following file names:
- ADVPACKU.EXE
- IMAGEHLPM.EXE
- ACCWIZG.EXE
- ACELPDECO.EXE
- ACTXPRXYO.EXE
- UPDATE[n].EXE
- 6.TMP
- E.TMP
- ED.TMP
- 78.TMP
- A6.TMP
- BA.TMP
- C_1252U.EXE
- 131B.TMP
- 4F7.TMP
- 6453.TMP
Filesizes
The following file size has been seen:
- 37,888 bytes
- 65,536 bytes
- 299,867 bytes
- 32,886 bytes
- 69,120 bytes
- 34,148 bytes
- 1,268,736 bytes
File Type
The filename 8C.TMP is used by multiple object types including executable programs,Dynamic Link LIbraries.
File Activity
One or more files with the name 8C.TMP creates, deletes, copies or moves the following files and folders:
- Creates c:\docume~1\user\locals~1\temp\0.EXE
- Creates c:\docume~1\user\locals~1\temp\1.EXE
- Creates c:\docume~1\user\locals~1\temp\3801091.bat
- Opens/modifes c:\autoexec.bat
- Deletes c:\docume~1\user\locals~1\temp\0.EX
- Deletes c:\docume~1\user\locals~1\temp\3801091.bat
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