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Submission Summary:

Submission details:

Submission received: 25 June 2012, 16:33:51
Processing time: 13 min 33 sec
Submitted sample:

File MD5: 0x0EB41E255F04125DEE0808C4C9A69696
File SHA-1: 0xC3133103AAA24EA1392967145317B209C2907F41
Filesize: 753,890 bytes

Technical Details:

The new window was created, as shown below:

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File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash
1	%Windir%\407878_290800717643754_206427760_n.jpg	84,240 bytes	MD5: 0x4C40C52F67D7BA4A370E87D5064891E4 SHA-1: 0x9D143317E3F0F8872C8B6026C719127232F1F6BB
2	%Windir%\ryuk1.exe	924,242 bytes	MD5: 0x143E5C8E36639189BB27087533FE7FBA SHA-1: 0xF4166CD6BBC47F30F2BCB1C4E4FDC97B4EAC4E2F
3	[file and pathname of the sample #1]	753,890 bytes	MD5: 0x0EB41E255F04125DEE0808C4C9A69696 SHA-1: 0xC3133103AAA24EA1392967145317B209C2907F41

Note:

%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
ryuk1.exe	%Windir%\ryuk1.exe	319,488 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	143,360 bytes

Registry Modifications

The following Registry Key was created:

HKEY_CURRENT_USER\Software\WinRAR SFX

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\WinRAR SFX]

C%%Windows = "C:\Windows"

Other details

Analysis of the file resources indicate the following possible countries of origin:

	United Kingdom
	Russian Federation

To mark the presence in the system, the following Mutex objects were created:

_x_X_UPDATE_X_x_
_x_X_PASSWORDLIST_X_x_
_x_X_BLOCKMOUSE_X_x_
_SHuassist.mtx

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