ThreatExpert Report: W32.Changeup!gen, Worm.Win32.VBNA.fbu, VBObfus.em, W32/SillyFDC-DR..

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Submission Summary:

Submission details:

Submission received: 30 August 2012, 04:57:08
Processing time: 7 min 49 sec
Submitted sample:

File MD5: 0x5D5ED29AC24FC1AF677E9D791127C3DE
File SHA-1: 0x1800F13CD24BD81E4AA56AE32D886A445FF38EF7
Filesize: 40,960 bytes
Alias:

W32.Changeup!gen [Symantec]
Worm.Win32.VBNA.fbu [Kaspersky Lab]
VBObfus.em [McAfee]
W32/SillyFDC-DR [Sophos]
Worm:Win32/Vobfus.B [Microsoft]
Worm.Win32.Vobfus [Ikarus]

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A network-aware worm that attempts to replicate across the existing network(s)

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%UserProfile%\%UserName%.exe	40,960 bytes	MD5: 0x8816308822614033B3F92B31B35B4433 SHA-1: 0x7B0CA8B80BA06FACDD98C05A5D914E76B0D57F64	W32.Changeup!gen [Symantec] Worm.Win32.VBNA.fbu [Kaspersky Lab] VBObfus.em [McAfee] W32/SillyFDC-DR [Sophos] Worm:Win32/Vobfus.B [Microsoft] Worm.Win32.Vobfus [Ikarus]
2	[file and pathname of the sample #1]	40,960 bytes	MD5: 0x5D5ED29AC24FC1AF677E9D791127C3DE SHA-1: 0x1800F13CD24BD81E4AA56AE32D886A445FF38EF7	W32.Changeup!gen [Symantec] Worm.Win32.VBNA.fbu [Kaspersky Lab] VBObfus.em [McAfee] W32/SillyFDC-DR [Sophos] Worm:Win32/Vobfus.B [Microsoft] Worm.Win32.Vobfus [Ikarus]

Note:

%UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (Windows NT/2000/XP).

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	49,152 bytes
%UserName%.exe	%UserProfile%\%UserName%.exe	49,152 bytes

Registry Modifications

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

%UserName% = "%UserProfile%\%UserName%.exe"

so that %UserName%.exe runs every time Windows starts

Other details

The following port was open in the system:

Port	Protocol	Process
1033	TCP	[file and pathname of the sample #1]

The following Host Name was requested from a host database:

ns1.theimageparlour.net

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
ns1.theimageparlour.net	8000

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