File Investigation Report
TFK8.EXECloaked Malware
Your PC is infected. The file called TFK8.EXE is considered unsafe and there may be other infections on your PC.
You should urgently check your PC and remove any malicious software including TFK8.EXE as soon as possible. The free version of Prevx CSI will scan your PC for millions of spyware and malware infections in less than 2 minutes. Don't put your confidential data, or your identity at risk, check your PC now with Prevx CSI.
Associated Malware Groups
The filename is associated with the malware groups:
- Cloaked Malware
- Rootkit
File Behavior
TFK8.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Creates a new Background Service on the machine
- This Process Creates Other Processes On Disk
- Loads and Executes a System Driver File
- This Process Deletes Other Processes From Disk
- Registers a Dynamic Link Library File
- Copies files
- Executes a Process
- Injects code into other processes
- The Process is polymorphic and can change its structure
TFK8.EXE has been the subject of the following behavior:
- Deleted as a process from disk
- Added as a Registry auto start to load Program on Boot up
- Created as a process on disk
- Executed as a Process
- Copied to multiple locations on the system
- Has code inserted into its Virtual Memory space by other programs
Country Of Origin
The filename TFK8.EXE was first seen on May 20 2008 in the following geographical regions of the Prevx community:
- TURKEY on May 20 2008
- URUGUAY on May 21 2008
- GERMANY on May 21 2008
- The UNITED KINGDOM on May 23 2008
- The EUROPEAN UNION on Aug 15 2008
- POLAND on Oct 26 2008
File Name Aliases
TFK8.EXE can also use the following file names:
- AMVO.EXE
- MG.EXE
- RQQ2V.BAT
- XMG.EXE
- 95631256.EXE
- 14683748.SVD
Filesizes
The following file size has been seen:
- 105,588 bytes
- 237,683 bytes
- 107,520 bytes
- 106,611 bytes
- 106,582 bytes
Vendor, Product and Version Information
These files have no vendor, product or version information specified in the file header.
File Type
The filename TFK8.EXE refers to many versions of an executable program.
File Activity
One or more files with the name TFK8.EXE creates, deletes, copies or moves the following files and folders:
- Creates c:\docume~1\user\locals~1\temp\5vbv8jn.dll
- Copies filec:\windows\system32\dllcache\vga.sys to c:\windows\system32\drivers\vga.sys
- Deletes c:\windows\system32\amvo.exe
- Deletes c:\windows\system32\amvo0.dll
- Creates c:\windows\system32\amvo0.dll
- Deletes c:\tfk8.ex
- Copies filec:\windows\system32\amvo.exe to c:\tfk8.ex
- Deletes c:\autorun.in
- Creates c:\autorun.in
- Deletes d:\tfk8.ex
- Copies filec:\windows\system32\amvo.exe to d:\tfk8.ex
- Deletes d:\autorun.in
- Creates d:\autorun.in
- Deletes c:\docume~1\user\locals~1\temp\help.rar
- Deletes c:\windows\mg.ex
- Deletes c:\rqq2v.bat
- Copies filec:\windows\system32\amvo.exe to c:\rqq2v.bat
- Deletes c:\windows\system32\ddr.ex
- Deletes c:\t1ypkh.ex
- Copies filec:\windows\system32\ckvo.exe to c:\t1ypkh.ex
- Deletes c:\docume~1\user\locals~1\temp\help1.rar
- Deletes c:\windows\system32\ckvo0.dl
- Deletes c:\docume~1\user\locals~1\temp\help.ex
- Opens/modifes c:\autoexec.bat
- Moves c:\docume~1\user\locals~1\temp\help.exe to c:\docume~1\user\locals~1\temp\tru374.tmp
- Creates c:\windows\mg.exe
- Creates c:\windows\system32\drivers\klif.sys
- Deletes c:\windows\system32\drivers\klif.sys
- Copies filec:\windows\mg.exe to c:\windows\system32\amvo.exe
- Deletes c:\windows\system32\amvo1.dll
- Creates c:\windows\system32\amvo1.dll
- Deletes c:\windows\system32\ddr.exe
- Creates c:\windows\system32\ddr.exe
- Deletes c:\windows\system32\ckvo.exe
- Copies filec:\windows\system32\ddr.exe to c:\windows\system32\ckvo.exe
- Deletes c:\windows\system32\ckvo0.dll
- Creates c:\windows\system32\ckvo0.dll
- Creates c:\docume~1\user\locals~1\temp\help1.rar
- Deletes c:\docume~1\user\locals~1\temp\help.exe
- Creates c:\docume~1\user\locals~1\temp\help.exe
- Copies filec:\docume~1\user\locals~1\temp\help.exe to c:\windows\system32\ckvo.exe
Registry Activity
One or more files with the name TFK8.EXE creates or modifies the following registry keys and values:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run amva C:\WINDOWS\system32\amvo.exe
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced Hidden value:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced ShowSuperHidden value:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer NoDriveTypeAutoRun [REG_DWORD, value: 00000091]
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run kamsoft C:\WINDOWS\system32\ckvo.exe
Website Activity
One or more files with the name TFK8.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:19
- Port 80 IP:60.169.1.92
- TCP:127.0.0.1:1098 Port:18
- TCP:127.0.0.1:1101 Port:17
- TCP:127.0.0.1:1105 Port:17
- TCP:127.0.0.1:1108 Port:17