ThreatExpert Report: Mal/Behav-130, Trojan.Win32.Cosmu

Submission Summary:

Submission details:

Submission received: 18 September 2012, 21:30:01
Processing time: 7 min 45 sec
Submitted sample:

File MD5: 0x2BE30982D262CBC357180B0F28A91359
File SHA-1: 0x1816D9543305A819BFD09BF167E79B17B3AD9347
Filesize: 69,632 bytes

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.

Technical Details:

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash
1	[file and pathname of the sample #1]	69,632 bytes	MD5: 0x2BE30982D262CBC357180B0F28A91359 SHA-1: 0x1816D9543305A819BFD09BF167E79B17B3AD9347

The following directory was created:

c:\$Recicle$

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	69,632 bytes

Other details

The following Host Name was requested from a host database:

192.5.5.241

The data identified by the following URL was then requested from the remote web server:

http://trassex2012.com/winger.mp3

Downloaded File Summary:

Download details:

Download retrieved: 18 September 2012 21:37:47
Processing time: 7 min 47 sec
Downloaded sample:

File MD5: 0xE993835737051EF57C2869D0409B485F
File SHA-1: 0x2FB35B9A3D0616FFD330DF862A522F8C15D0A909
Filesize: 426,496 bytes
Alias:

Mal/Behav-130 [Sophos]
Trojan.Win32.Cosmu [Ikarus]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
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	%System%\cflnk.dll	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	[file and pathname of the sample #1]	426,496 bytes	MD5: 0xE993835737051EF57C2869D0409B485F SHA-1: 0x2FB35B9A3D0616FFD330DF862A522F8C15D0A909	Mal/Behav-130 [Sophos] Trojan.Win32.Cosmu [Ikarus]

Note:

%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	454,656 bytes

Registry Modifications

The newly created Registry Value is:

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

WGer = "[file and pathname of the sample #1]"

so that [file and pathname of the sample #1] runs every time Windows starts

Other details

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

Brazil

The following Host Name was requested from a host database:

192.5.5.241

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
www.google.com.br	80	(null)	(null)

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