File Investigation Report
YBJ8DF.EXECloaked Malware
Your PC is infected. The file called YBJ8DF.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 YBJ8DF.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 group:
- Cloaked Malware
File Behavior
YBJ8DF.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- This Process Creates Other Processes On Disk
- This Process is a file infector which modifies program files to include a host a copy of the infection
- Creates a new Background Service on the machine
- Loads and Executes a System Driver File
- This Process Deletes Other Processes From Disk
- Copies files
- Registers a Dynamic Link Library File
- Writes to another Process's Virtual Memory (Process Hijacking)
YBJ8DF.EXE 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
- This program is often downloaded from the web
- Deleted as a process from disk
- Executed as a Process
- Has code inserted into its Virtual Memory space by other programs
- Copied to multiple locations on the system
- Registered as a Dynamic Link Library File
Country Of Origin
The filename YBJ8DF.EXE was first seen on Jul 19 2008 in the following geographical regions of the Prevx community:
- The EUROPEAN UNION on Jul 19 2008
- SOUTH AFRICA on Jul 21 2008
File Name Aliases
YBJ8DF.EXE can also use the following file names:
- CKVO.EXE
- DDR.EXE
- HELP.EXE
- 19262058.SVD
- 03514382.EXE
- 66165405.EXE
- 47527781.EXE
- 89699937.SVD
Filesizes
The following file size has been seen:
- 118,782 bytes
- 117,479 bytes
- 115,799 bytes
Vendor, Product and Version Information
These files have no vendor, product or version information specified in the file header.
File Type
The filename YBJ8DF.EXE refers to many versions of an executable program.
File Activity
One or more files with the name YBJ8DF.EXE creates, deletes, copies or moves the following files and folders:
- Creates c:\docume~1\user\locals~1\temp\hs7nysg.dll
- Copies filec:\windows\system32\dllcache\vga.sys to c:\windows\system32\drivers\vga.sys
- Deletes c:\windows\system32\ckvo.exe
- Deletes c:\windows\system32\ckvo0.dll
- Creates c:\windows\system32\ckvo0.dll
- Deletes c:\ybj8df.ex
- Copies filec:\windows\system32\ckvo.exe to c:\ybj8df.ex
- Deletes c:\autorun.in
- Creates c:\autorun.in
- Deletes d:\ybj8df.ex
- Copies filec:\windows\system32\ckvo.exe to d:\ybj8df.ex
- Deletes d:\autorun.in
- Creates d:\autorun.in
- Deletes c:\docume~1\user\locals~1\temp\help1.rar
- Deletes c:\docume~1\user\locals~1\temp\help.ex
- Opens/modifes c:\autoexec.bat
- 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 YBJ8DF.EXE creates or modifies the following registry keys and values:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run kamsoft C:\WINDOWS\system32\ckvo.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 YBJ8DF.EXE interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- TCP:127.0.0.1:1091 Port:19
- Port 80 IP:60.169.2.240
- TCP:127.0.0.1:1094 Port:18