File Investigation Report
KNUPKB.COMCloaked Malware
Your PC is infected. The file called KNUPKB.COM is considered unsafe and there may be other infections on your PC.
You should urgently check your PC and remove any malicious software including KNUPKB.COM 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 group:
- Cloaked Malware
File Behavior
KNUPKB.COM has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Adds a Registry Key (RUN) to auto start Programs on system start up
- This Process Creates Other Processes On Disk
- This Process Deletes Other Processes From Disk
- Writes to another Process's Virtual Memory (Process Hijacking)
- Registers a Dynamic Link Library File
- Loads and Executes a System Driver File
- The process hooks code into all running processes which could allow it to take control of the system or record keyboard input, mouse activity and screen contents
- Executes a Process
- Copies files
- This Process looks to see what security products and services are running on the system
- Disables safe mode on your PC
- 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
KNUPKB.COM has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Created as a process on disk
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Deleted as a process from disk
- Copied to multiple locations on the system
Country Of Origin
The filename KNUPKB.COM was first seen on Aug 4 2008 in the following geographical regions of the Prevx community:
- The EUROPEAN UNION on Aug 4 2008
- SPAIN on Aug 4 2008
- GERMANY on Aug 4 2008
- EGYPT on Nov 29 2008
File Name Aliases
KNUPKB.COM can also use the following file names:
- AMVO.EXE
- LMG.EXE
- 00903704.SVD
- 12233832.EXE
- 09835221.EXE
- 48520517.COM
- 88986936.COM
- 28313641.SVD
Filesizes
The following file size has been seen:
- 89,300 bytes
- 117,760 bytes
- 1,522,900 bytes
Vendor, Product and Version Information
These files have no vendor, product or version information specified in the file header.
File Type
The filename KNUPKB.COM refers to many versions of an executable program.
File Activity
One or more files with the name KNUPKB.COM creates, deletes, copies or moves the following files and folders:
- Creates c:\windows\system32\drivers\klif.sys
- Deletes c:\windows\system32\drivers\klif.sys
- Deletes c:\windows\system32\amvo.exe
- Deletes c:\windows\system32\amvo0.dll
- Creates c:\windows\system32\amvo0.dll
- Deletes c:\knupkb.co
- Copies filec:\windows\system32\amvo.exe to c:\knupkb.co
- Deletes c:\autorun.in
- Creates c:\autorun.in
- Deletes d:\knupkb.co
- Copies filec:\windows\system32\amvo.exe to d:\knupkb.co
- Deletes d:\autorun.in
- Creates d:\autorun.in
- Deletes c:\docume~1\user\locals~1\temp\help.rar
- Deletes c:\windows\lmg.ex
- Opens/modifes c:\autoexec.bat
- Moves c:\docume~1\user\locals~1\temp\help.exe to c:\docume~1\user\locals~1\temp\tru1C7.tmp
- Creates c:\windows\lmg.exe
- Copies filec:\windows\lmg.exe to c:\windows\system32\amvo.exe
- Deletes c:\windows\system32\amvo1.dll
- Creates c:\windows\system32\amvo1.dll
Registry Activity
One or more files with the name KNUPKB.COM 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]
Website Activity
One or more files with the name KNUPKB.COM interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- TCP:127.0.0.1:1095 Port:19
- Port 80 IP:60.169.1.92
- TCP:127.0.0.1:1098 Port:18