ThreatExpert Report: Backdoor.Trojan

Submission Summary:

Submission details:

Submission received: 3 October 2012, 15:45:50
Processing time: 9 min 36 sec
Submitted sample:

File MD5: 0xD9D2E1CE4BAF4CF37DF3F42118AA89FA
File SHA-1: 0xF63199C7D14AE9310C5A9FC2DA2D4FA7FA7B9ACC
Filesize: 211,646 bytes
Alias: Backdoor.Trojan [Symantec]

Summary of the findings:

What's been found	Severity Level
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\AdobeUpdate.exe	24,576 bytes	MD5: 0xDBB5B239F8580BA63168E85EE8036EB3 SHA-1: 0x46657F05095EE6723DC44F8B1BDB073743E1A200	(not available)
2	%Temp%\winsever.dll	113,152 bytes	MD5: 0x25D7B24FE5B4B5B34B28089392CA8422 SHA-1: 0xCC456F327D46F237BA55A94052B3A8A9BBE468F2	Backdoor.Trojan [Symantec]
3	[file and pathname of the sample #1]	211,646 bytes	MD5: 0xD9D2E1CE4BAF4CF37DF3F42118AA89FA SHA-1: 0xF63199C7D14AE9310C5A9FC2DA2D4FA7FA7B9ACC	Backdoor.Trojan [Symantec]
4	%Windir%\Tasks\RealUpgradeLogonTaskS-2-9-64-65887412.job	332 bytes	MD5: 0x6B02BF8C7CD37B140929521A28036D5D SHA-1: 0xDB9660EEE74C123B141C3DE84DD79C5E34B5BE83	(not available)

Notes:

%Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
%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
[filename of the sample #1]	[file and pathname of the sample #1]	208,896 bytes
in.exe	%Temp%\RarSFX0\in.exe	208,896 bytes
AdobeUpdate.exe	%Temp%\AdobeUpdate.exe	24,576 bytes

Other details

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

China

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

_SHuassist.mtx

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