ThreatExpert Report: Trojan Horse, Trojan.Win32.Cossta.dx, Mal

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Submission Summary:

Submission details:

Submission received: 24 September 2012, 09:47:42
Processing time: 7 min 34 sec
Submitted sample:

File MD5: 0x0CB6C45225FFB674F941CAF9AEAAA61A
File SHA-1: 0xA11177B7DBFC6DE03FCB93095400A33A12FF1D56
Filesize: 632,320 bytes
Alias:

Trojan Horse [Symantec]
Trojan.Win32.Cossta.dx [Kaspersky Lab]
Mal_Banld-2 [Trend Micro]
Mal/Banspy-K [Sophos]
TrojanDownloader:Win32/Banload.gen!N [Microsoft]
Backdoor.Win32.Reload [Ikarus]
Win-Trojan/Cossta.632320 [AhnLab]

Technical Details:

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Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%CommonPrograms%\Startup\[filename of the sample #1] [file and pathname of the sample #1]	632,320 bytes	MD5: 0x0CB6C45225FFB674F941CAF9AEAAA61A SHA-1: 0xA11177B7DBFC6DE03FCB93095400A33A12FF1D56	Trojan Horse [Symantec] Trojan.Win32.Cossta.dx [Kaspersky Lab] Mal_Banld-2 [Trend Micro] Mal/Banspy-K [Sophos] TrojanDownloader:Win32/Banload.gen!N [Microsoft] Backdoor.Win32.Reload [Ikarus] Win-Trojan/Cossta.632320 [AhnLab]

Note:

%CommonPrograms% is a variable that refers to the file system directory that contains the directories for the common program groups that appear on the Start menu for all users. A typical path is C:\Documents and Settings\All Users\Start Menu\Programs (Windows NT/2000/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]	659,456 bytes

Registry Modifications

The newly created Registry Value is:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

WinFirewall32 = "[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

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

RioParanaZao...

The following port was open in the system:

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

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