USB40 (Derivative 84350773), Prevx

Associated Malware Groups

The unsafe files using this name are associated with the malware groups:

Worm
Malware Downloader
Malicious Software

File Behavior

USB40 has been seen to perform the following behavior:

Executes a Process
This Process Deletes Other Processes From Disk
This process creates other processes on disk
Drops known malicious software during execution
Includes file creation code which could be used to test for interception by security products
Makes outbound connections to other computers using NETBIOSOUT protocols
Registers a Dynamic Link Library File

USB40 has been the subject of the following behavior:

Deleted as a process from disk
Created as a process on disk
Executed as a Process
Has code inserted into its Virtual Memory space by other programs
Enabled as a COM Object/Server on the Local Machine

Country Of Origin

The filename USB40 was first seen on May 8 2007 in the following geographical regions of the Webroot community:

The United States on May 8 2007
Netherlands on May 8 2007
Europe on Jun 5 2007
South Africa on Jan 24 2009
Spain on Aug 4 2009

File Name Aliases

USB40 can also use the following file names:

ACRODIST.EXE
ACROBAT.EXE
CRASHREPORTER.EXE
MDM.EXE
PHOTOSHOPCS4.EXE
ACROBATINFO.EXE
ADOBELM_CLEANUP.0001
73254743.TXT

Filesizes

The following file size has been seen:

227,328 bytes
104,816 bytes
306,688 bytes
32,256 bytes
14,456 bytes

File Type

The filename USB40 refers to many versions of an executable program.

File Activity

One or more files with the name USB40 creates, deletes, copies or moves the following files and folders:

create folder C:\WINDOWS\uninstall\
Creates c:\windows\uninstall\rundl132.exe
Creates c:\windows\Logo1_.exe
Deletes c:\docume~1\user\locals~1\temp\$$aB.bat
Creates c:\docume~1\user\locals~1\temp\$$aB.bat
Creates c:\windows\Dll.dll
Creates d:\_desktop.ini
Creates c:\_desktop.ini
Creates c:\config.msi\_desktop.ini
Creates c:\malwarefiles\_desktop.ini
Creates c:\mbr\_desktop.ini
Creates c:\program files\_desktop.ini
Creates c:\program files\ati technologies\_desktop.ini
Creates c:\program files\ati technologies\uninstallall\_desktop.ini
Creates c:\program files\intel\_desktop.ini
Creates c:\program files\intel\ans\_desktop.ini
Creates c:\program files\intel\dmix\_desktop.ini
Creates c:\program files\intel\dmix\hlp\_desktop.ini
Creates c:\program files\intel\dmix\resource\_desktop.ini
Creates c:\program files\intel\dmix\uninst\_desktop.ini
Creates c:\program files\intel\ncs2\_desktop.ini
Creates c:\program files\intel\ncs2\agent\_desktop.ini
Creates c:\program files\intel\ncs2\wmiprov\_desktop.ini
Creates c:\program files\intel\ncs2\wmiprov\mof\_desktop.ini
Creates c:\program files\microsoft bootvis\_desktop.ini
Creates c:\program files\msn\_desktop.ini
Creates c:\program files\msn\msncorefiles\_desktop.ini
Creates c:\program files\msn\msncorefiles\install\_desktop.ini
Creates c:\program files\msn\msncorefiles\install\msn9components\_desktop.ini
Creates c:\program files\msn\msncorefiles\oobe\_desktop.ini
Creates c:\program files\online services\_desktop.ini
Creates c:\program files\prevx\_desktop.ini
Creates c:\program files\prevx2\_desktop.ini
Creates c:\program files\realtek\_desktop.ini
Creates c:\program files\realtek\installshield\_desktop.ini
Creates c:\program files\realtek\realtek gbe & fe ethernet pci nic driver\_desktop.ini
Creates c:\program files\uninstall information\_desktop.ini
Creates c:\program files\winpcap\_desktop.ini
Creates c:\program files\xerox\_desktop.ini
Creates c:\program files\xerox\nwwia\_desktop.ini
Creates c:\recycler\_desktop.ini
Creates c:\recycler\s-1-5-18\_desktop.ini
Creates c:\recycler\s-1-5-21-1318987518-2299825339-2237029002-1003\_desktop.ini
Creates c:\recycler\s-1-5-21-3134616843-514352727-1000831924-1003\_desktop.ini
Creates c:\recycler\s-1-5-21-3826821714-1538417202-2915903831-1003\_desktop.ini
Creates c:\recycler\s-1-5-21-68915448-4046404905-339382883-1003\_desktop.ini
Creates c:\recycler\s-1-5-21-796845957-492894223-725345543-1003\_desktop.ini
Creates c:\docume~1\user\locals~1\temp\f45d_appcompat.txt
Creates c:\docume~1\user\locals~1\temp\1FD27.dmp
Opens/modifes c:\autoexec.bat

Network Activity

One or more files with the name USB40 performs the following network events:

DNS Lookup1.1.22.1 DC22-0BBFE8DF

Help the Webroot Community to fight cyber crime

We are always looking for ways to improve the quality and speed of research to help us protect you from malicious software and cyber crime.

The filename referred to in this report is often associated with PC infections. If you have a program of this name on your PC and would like to help our research please tell us what you know in the form below:

I have this file on my PC and believe it is an infection
I have this file on my PC and think it has made my PC slower
My firewall asked if I wanted to let this file have access to the Internet
My PC will not work since I noticed this file on it
My antivirus detected this file but won't remove it
I know what this file is and believe it is a Safe program
I am the author of this file and would like to discuss how to have it reclassified as safe

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USB40

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