File Investigation Report
JFVKCSY.BAT
Cloaked MalwarePC Cleanup in 3 Easy Steps
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Associated Malware Groups
The filename is associated with the malware group:
- Cloaked Malware
File Behavior
JFVKCSY.BAT has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- Registers a Dynamic Link Library File
- This process creates other processes on disk
- This Process Deletes Other Processes From Disk
- Executes a Process
- Injects code into other processes
- 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
- Loads and Executes a System Driver File
- Writes to another Process's Virtual Memory (Process Hijacking)
- The Process is polymorphic and can change its structure
- Found on infected systems and resists interrogation by security products
- Uses low level functions to hide itself from the user and from system/security processes
- Adds a Registry Key (RUN) to auto start Programs on system start up
JFVKCSY.BAT has been the subject of the following behavior:
- Added as a Registry auto start to load Program on Boot up
- Executed as a Process
- Created as a process on disk
- Copied to multiple locations on the system
- Deleted as a process from disk
- Registered as a Dynamic Link Library File
- Has code inserted into its Virtual Memory space by other programs
Country Of Origin
The filename JFVKCSY.BAT was first seen on Apr 28 2008 in the following geographical regions of the Prevx community:
- SINGAPORE on Apr 28 2008
- The EUROPEAN UNION on Apr 29 2008
- EGYPT on May 2 2008
- The UNITED KINGDOM on May 2 2008
- BRAZIL on May 17 2008
- SPAIN on May 17 2008
File Name Aliases
JFVKCSY.BAT can also use the following file names:
- AMVO.EXE
- DPTREA~1.COM
- XMG.EXE
- L2F.CMD
- R6R.EXE
- 16219554.SVD
Filesizes
The following file size has been seen:
- 133,120 bytes
- 104,269 bytes
- 104,448 bytes
- 282,076 bytes
File Type
The filename JFVKCSY.BAT refers to many versions of an executable program.
File Activity
One or more files with the name JFVKCSY.BAT creates, deletes, copies or moves the following files and folders:
- Creates c:\windows\system32\wmdrtc32.dl_
- Creates c:\KUKU400alpha
- Deletes c:\KUKU400alpha
- Creates d:\KUKU400alpha
- Deletes d:\KUKU400alpha
- Creates f:\KUKU400alpha
- Creates g:\KUKU400alpha
- Creates h:\KUKU400alpha
- Creates c:\docume~1\user\locals~1\temp\h8my7hut.dll
- Creates i:\KUKU400alpha
- Creates j:\KUKU400alpha
- Creates k:\KUKU400alpha
- Deletes c:\docume~1\user\locals~1\temp\je71tfbb.sy
- Creates c:\docume~1\user\locals~1\temp\je71tfbb.sys
- Creates z:\KUKU400alph
- Deletes c:\windows\system32\drivers\fjpgqn.sys
- Creates c:\windows\system32\drivers\fjpgqn.sys
- Deletes c:\windows\system32\amvo.exe
- Deletes c:\windows\system32\amvo0.dll
- Creates c:\windows\system32\amvo0.dll
- Opens/modifes c:\autoexec.bat
- Deletes c:\jfvkcsy.ba
- Copies filec:\windows\system32\amvo.exe to c:\jfvkcsy.ba
- Deletes c:\autorun.in
- Creates c:\autorun.in
- Deletes d:\jfvkcsy.ba
- Copies filec:\windows\system32\amvo.exe to d:\jfvkcsy.ba
- Deletes d:\autorun.in
- Creates d:\autorun.in
- Deletes c:\docume~1\user\locals~1\temp\help.rar
Network Activity
One or more files with the name JFVKCSY.BAT performs the following network events:
- DNS Lookup207.46.19.254 www.microsoft.com
Website Activity
One or more files with the name JFVKCSY.BAT interacts with the following web sites and pages. Web addresses have been deliberately modified to prevent unintentional use.
- TCP:127.0.0.1:1085 Port:18
- Port 80 IP:60.169.1.92
- TCP:127.0.0.1:1087 Port:18
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