ThreatExpert Report: W32.SillyFDC, Worm.Win32.VBNA.isu, Downloader-CJX.gen.g, W32/SillyFDC-FU..

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Submission Summary:

Submission details:

Submission received: 28 August 2012, 21:01:14
Processing time: 12 min 29 sec
Submitted sample:

File MD5: 0x962C64CF17BEBBC96F945FB4EE0146C5
File SHA-1: 0x9B0C1BEE8363BD894F7F8A21906DB7BDB444D6BA
Filesize: 49,152 bytes
Alias:

W32.SillyFDC [Symantec]
Worm.Win32.VBNA.isu [Kaspersky Lab]
Downloader-CJX.gen.g [McAfee]
W32/SillyFDC-FU [Sophos]
Worm:Win32/Vobfus.C [Microsoft]
Virus.Worm.Win32.VBNA [Ikarus]
Win32/Vbna3.worm.Gen [AhnLab]

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%\viuoqu.exe	49,152 bytes	MD5: 0x5FEB01101C4E0E3E2F89758AF934BFFB SHA-1: 0xA7889E47BD54D75B5B89FF78B70E50339F06D16B	W32.SillyFDC [Symantec] Worm.Win32.VBNA.isu [Kaspersky Lab] Downloader-CJX.gen.g [McAfee] W32/SillyFDC-FU [Sophos] Worm:Win32/Vobfus.C [Microsoft] Virus.Worm.Win32.VBNA [Ikarus] Win32/Vbna3.worm.Gen [AhnLab]
2	[file and pathname of the sample #1]	49,152 bytes	MD5: 0x962C64CF17BEBBC96F945FB4EE0146C5 SHA-1: 0x9B0C1BEE8363BD894F7F8A21906DB7BDB444D6BA	W32.SillyFDC [Symantec] Worm.Win32.VBNA.isu [Kaspersky Lab] Downloader-CJX.gen.g [McAfee] W32/SillyFDC-FU [Sophos] Worm:Win32/Vobfus.C [Microsoft] Virus.Worm.Win32.VBNA [Ikarus] Win32/Vbna3.worm.Gen [AhnLab]

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]	57,344 bytes
viuoqu.exe	%UserProfile%\viuoqu.exe	57,344 bytes

Registry Modifications

The newly created Registry Value is:

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

viuoqu = "%UserProfile%\viuoqu.exe"

so that viuoqu.exe runs every time Windows starts

Other details

To mark the presence in the system, the following Mutex object was created:

The following Host Names were requested from a host database:

192.5.5.241
ns4.theimageparlour.net

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

Remote Host	Port Number
ns4.theimageparlour.net	8000

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