File Investigation Report
NTOS.EXE
Banking Info StealerPC Cleanup in 3 Easy Steps
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Associated Malware Groups
The filename is associated with the malware groups:
- Banking Info Stealer
- Targeted Information Stealer
File Behavior
NTOS.EXE has been seen to perform the following behavior:
- The Process is packed and/or encrypted using a software packing process
- 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
- Executes a Process
- Injects code into other processes
- Creates new folders in the file system
- Creates a new Background Service on the machine
- Looks at the contents of the autoexec.bat file
- Drops known malicious software during execution
- Reads email address and phone book details
- Uses functions common to keyboard loggers, screen or form grabbers, and information stealers
- This Process Deletes Other Processes From Disk
- Writes to another Process's Virtual Memory (Process Hijacking)
NTOS.EXE has been the subject of the following behavior:
- Copied to multiple locations on the system
- Executed as a Process
- Created as a process on disk
- Deleted as a process from disk
Country Of Origin
The filename NTOS.EXE was first seen on Sep 9 2009 in the following geographical regions of the Prevx community:
- The UNITED STATES on Sep 9 2009
- The EUROPEAN UNION on Sep 9 2009
- GREAT BRITAIN on Nov 8 2009
File Name Aliases
NTOS.EXE can also use the following file names:
- US4[n].EXE
- US5[n].EXE
- O8|0C31D67D7C86B9B07E66E8A5FF568DC9.EXE
- US5[1].EXE
- US4[1].EXE
- 2.TMP
- 6.TMP
- 3.TMP
- 4.TMP
- US5.EXE
- US5_001.EXE
- M4|41625284.EXE
- M4|13618169.EXE
Filesizes
The following file size has been seen:
- 51,200 bytes
- 159,232 bytes
- 50,688 bytes
- 495,616 bytes
File Type
The filename NTOS.EXE refers to many versions of an executable program.
File Activity
One or more files with the name NTOS.EXE creates, deletes, copies or moves the following files and folders:
- create folder C:\WINDOWS\system32\wsnpoem
- Deletes c:\windows\system32\ntos.exe
- Opens/modifes c:\autoexec.bat
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