ThreatExpert Report: Backdoor:Win32/Agent.ACG

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Submission Summary:

Submission details:

Submission received: 2 October 2011, 20:43:59
Processing time: 9 min 6 sec
Submitted sample:

File MD5: 0xFF1CA554A814D5AE54278D2373013B1E
File SHA-1: 0x8DA3F973194C95B0A09F24E2146B079E48E97AF1
Filesize: 68,252 bytes
Alias: Backdoor:Win32/Agent.ACG [Microsoft]

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\s32.txt	13 bytes	MD5: 0x8A303FE39E5652FE040707D0F9AE4DCC SHA-1: 0xCF10BF6C6A5149B18F23563E82BE424A865AECC7	(not available)
2	[file and pathname of the sample #1]	68,252 bytes	MD5: 0xFF1CA554A814D5AE54278D2373013B1E SHA-1: 0x8DA3F973194C95B0A09F24E2146B079E48E97AF1	Backdoor:Win32/Agent.ACG [Microsoft]

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
[generic host process]	[generic host process filename]	20,480 bytes

Notes:

[generic host process filename] is a full path filename of [generic host process].

The following modules were loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
[filename of the sample #1]	[file and pathname of the sample #1]	Process name: [generic host process] Process filename: [generic host process filename] Address space: 0x10000000 - 0x10057000
[filename of the sample #1]	[file and pathname of the sample #1]	Process name: IEXPLORE.EXE Process filename: %ProgramFiles%\internet explorer\iexplore.exe Address space: 0x10000000 - 0x10057000

Notes:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

Registry Modifications

The following Registry Key was created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Sft

The newly created Registry Value is:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Sft]

(Default) = "{8B38A9D2-5B00-48AA-B6AE-DDCA884830B0}"

Other details

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

Russian Federation

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