ThreatExpert Report: Backdoor.Win32.PcClient

Submission Summary:

Submission details:

Submission received: 26 October 2012, 09:32:28
Processing time: 11 min 24 sec
Submitted sample:

File MD5: 0x19A90C205F7A46ABD1836168AF45A771
File SHA-1: 0xA669BC98C02A85F0B35A53617F9A5CC091CBFC5C
Filesize: 88,576 bytes

Summary of the findings:

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

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\service.dll	68,096 bytes	MD5: 0x9AED4806476A0FD37A0C12699421E726 SHA-1: 0x34A65D966353046A69377CFA73CCE40616F2B021	Backdoor.Win32.PcClient [Ikarus]
2	%Temp%\service.exe [file and pathname of the sample #1]	88,576 bytes	MD5: 0x19A90C205F7A46ABD1836168AF45A771 SHA-1: 0xA669BC98C02A85F0B35A53617F9A5CC091CBFC5C	(not available)
3	%Programs%\Startup\service.lnk	776 bytes	MD5: 0x100070B25B307FDB3ABB4AAA3B174327 SHA-1: 0x26DE5556879F9C8A955DFFAF3F929E8747F3540D	(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).
%Programs% is a variable that refers to the file system directory that contains the user's program groups. A typical path is C:\Documents and Settings\[UserName]\Start Menu\Programs.

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
service.exe	%Temp%\service.exe	20,480 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	20,480 bytes

Other details

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

ps is running!

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

http://61.178.77.169:84/3010B70B 0000F0FD03003733374632453334363433353731363200434F 4D50555445524E414D45000000000000000000000000000000 00000000000000000000000000000000000000000000000000 0000000000000000000100000701557365724E616D65000000..

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