ThreatExpert Report: Worm:Win32/Vobfus.IT

Submission Summary:

Submission details:

Submission received: 2 October 2012, 21:35:01
Processing time: 9 min 26 sec
Submitted sample:

File MD5: 0xD87F0F69744A978B7240E8E34EF30D70
File SHA-1: 0x41EE42CE2F5C17C6D8912F9C481B8C72F884C039
Filesize: 290,874 bytes
Alias: Worm:Win32/Vobfus.IT [Microsoft]

Summary of the findings:

What's been found	Severity Level
Modifies some system settings that may have negative impact on overall system security state.
Creates a startup registry entry.

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%UserProfile%\jopam.exe	290,874 bytes	MD5: 0x855F5D10858F4AF997A61C53A7E9AAC1 SHA-1: 0xD1535DFF3DD1191E2C1DAD2821E629CD42D69AC2	Worm:Win32/Vobfus.IT [Microsoft]
2	[file and pathname of the sample #1]	290,874 bytes	MD5: 0xD87F0F69744A978B7240E8E34EF30D70 SHA-1: 0x41EE42CE2F5C17C6D8912F9C481B8C72F884C039	Worm:Win32/Vobfus.IT [Microsoft]

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]	303,104 bytes
jopam.exe	%UserProfile%\jopam.exe	303,104 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]

NoAutoUpdate = 0x00000001

to disable automatic Windows Updates

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

jopam = "%UserProfile%\jopam.exe /b"
jopam = "%UserProfile%\jopam.exe /k"

so that jopam.exe runs every time Windows starts

Other details

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

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.helpupdates.com

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

Remote Host	Port Number
ns1.helpupdates.com	8003

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