ThreatExpert Report: ZeroAccess!cfg, Mal/ZAccConf-A

Submission Summary:

Submission details:

Submission received: 18 September 2012, 02:32:27
Processing time: 9 min 8 sec
Submitted sample:

File MD5: 0xDB37834317DDF73E3340F46E06E520EE
File SHA-1: 0x0DC064C1EB3E57A526EE0234DF834ECCEC534088
Filesize: 158,720 bytes

Summary of the findings:

What's been found	Severity Level
Creates fake Recycle Bin folder.

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	c:\RECYCLER\S-1-5-18\$cbf7078772f9b6ef7e3c8c19ccb74892\@	2,048 bytes	MD5: 0x4505DFEEDD5511D211D661AC69B0AC40 SHA-1: 0x511ABC8EA7458C8F1CF8E87FCB3A0A87505216BB	ZeroAccess!cfg [McAfee] Mal/ZAccConf-A [Sophos]
2	c:\RECYCLER\S-1-5-18\$cbf7078772f9b6ef7e3c8c19ccb74892\n c:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892\n	47,616 bytes	MD5: 0x45322DFD5C9FFA19DCB9CD9FD8CC0F99 SHA-1: 0xD34A1DC3A4EDA43D776BAFE61FB204A0653E10A9	(not available)
3	c:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892\@	2,048 bytes	MD5: 0x955C6EBBF9F8FC0220B137385EA65706 SHA-1: 0xF66A4CB838F27DAB6F05510FE131B39A02F29C2B	ZeroAccess!cfg [McAfee] Mal/ZAccConf-A [Sophos]
4	[file and pathname of the sample #1]	158,720 bytes	MD5: 0xDB37834317DDF73E3340F46E06E520EE SHA-1: 0x0DC064C1EB3E57A526EE0234DF834ECCEC534088	(not available)

The following directories were created:

c:\RECYCLER\S-1-5-18
c:\RECYCLER\S-1-5-18\$cbf7078772f9b6ef7e3c8c19ccb74892
c:\RECYCLER\S-1-5-18\$cbf7078772f9b6ef7e3c8c19ccb74892\L
c:\RECYCLER\S-1-5-18\$cbf7078772f9b6ef7e3c8c19ccb74892\U
c:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892
c:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892\L
c:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892\U

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]	229,376 bytes

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

Module Name	Module Filename	Address Space Details
z	%System%\z	Process name: services.exe Process filename: %System%\services.exe Address space: 0x45670000 - 0x4567F000
z	%System%\z	Process name: explorer.exe Process filename: %Windir%\explorer.exe Address space: 0x45670000 - 0x4567F000

Notes:

%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).
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

The following system service was modified:

Service Name	Display Name	New Status	Service Filename
ALG	Application Layer Gateway Service	"Stopped"	%System%\alg.exe

Registry Modifications

The following Registry Keys were created:

HKEY_CURRENT_USER\Software\Classes\CLSID\{fbeb8a05-beee-4442-804e-409d6c4515e9}
HKEY_CURRENT_USER\Software\Classes\CLSID\{fbeb8a05-beee-4442-804e-409d6c4515e9}\InprocServer32

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\Classes\CLSID\{fbeb8a05-beee-4442-804e-409d6c4515e9}\InprocServer32]

ThreadingModel = "Both"
(Default) = "C:\RECYCLER\S-1-5-21-606747145-764733703-839522115-1003\$cbf7078772f9b6ef7e3c8c19ccb74892\n."

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