ThreatExpert Report: Trojan-PWS.OnlineGames.generic.A!ct, Trojan.Packed.NsAnti, PWS-Gamania.gen.a..

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Submission Summary:

Submission details:

Submission received: 4 January 2010, 01:50:22
Processing time: 6 min 10 sec
Submitted sample:

File MD5: 0x26810AD5AF0933B7E68A118E9A2DAAB3
File SHA-1: 0x766E607F2B590B865044CBFBE439D7DA09864B66
Filesize: 107,966 bytes
Alias:

Trojan-PWS.OnlineGames.generic.A!ct [PCTools]
Trojan.Packed.NsAnti [Symantec]
PWS-Gamania.gen.a [McAfee]
Mal_NSAnti-1 [Trend Micro]
Mal/EncPk-CE, Mal/EncPk-DH [Sophos]
Worm:Win32/Taterf.AA [Microsoft]
Win-Trojan/OnlineGameHack.107966 [AhnLab]

Summary of the findings:

What's been found	Severity Level
Sets the drive to autoplay by creating autorun.inf file in its root directory. If the drive is shared across the network then other remote computers can be infected any time they try to access this share.
Downloads/requests other files from Internet.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

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 files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	c:\autorun.inf	542 bytes	MD5: 0x3DD5872F54137B3516559A611BC31481 SHA-1: 0xE6390986F13C75FE7D625E094D074733C5424D95	Trojan.Autorun!ct [PCTools] Generic!atr [McAfee] Mal/AutoInf-B, Mal/AutoInf-A [Sophos] Worm.Win32.AutoRun [Ikarus]
2	%Temp%\pd7crtpf.dll	29,799 bytes	MD5: 0x909D15EF5E241B8B83A09D91DE475E07 SHA-1: 0x20C50BE5D63804EA7440D8DE7B1EC5877EB32595	Trojan-PWS.OnlineGames.generic.A!ct [PCTools] Trojan.Packed.NsAnti [Symantec] PWS-Gamania.gen.a [McAfee] Mal/Generic-A [Sophos] VirTool:Win32/Vanti.gen!C [Microsoft] Win-Trojan/Xema.variant [AhnLab]
3	c:\qa8sywva.cmd %System%\amvo.exe [file and pathname of the sample #1]	107,966 bytes	MD5: 0x26810AD5AF0933B7E68A118E9A2DAAB3 SHA-1: 0x766E607F2B590B865044CBFBE439D7DA09864B66	Trojan-PWS.OnlineGames.generic.A!ct [PCTools] Trojan.Packed.NsAnti [Symantec] PWS-Gamania.gen.a [McAfee] Mal_NSAnti-1 [Trend Micro] Mal/EncPk-CE, Mal/EncPk-DH [Sophos] Worm:Win32/Taterf.AA [Microsoft] Win-Trojan/OnlineGameHack.107966 [AhnLab]
4	%System%\amvo0.dll %System%\amvo1.dll	74,240 bytes	MD5: 0x496C007AB8F55FDE9FEB5ACF3BA6EFC9 SHA-1: 0x84AF83F03245C664DCDA990C73E23D2C6185EB99	Trojan.Lineage.Gen!Pac.3 [PCTools] Trojan.Packed.NsAnti [Symantec] PWS-Gamania.gen.a [McAfee] Mal/EncPk-CE, Mal/EncPk-DH [Sophos] Worm:Win32/Taterf.A.dll [Microsoft] Win-Trojan/Xema.variant [AhnLab]

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).
%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 were new processes created in the system:

Process Name	Process Filename	Main Module Size
amvo.exe	%System%\amvo.exe	204,800 bytes
iexplore.exe	%ProgramFiles%\Internet Explorer\iexplore.exe	102,400 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	204,800 bytes

Notes:

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

There was a new memory page created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
explorer.exe	%Windir%\explorer.exe	131,072 bytes

Notes:

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

The following module was loaded into the address space of other process(es):

Module Name	Module Filename	Address Space Details
amvo0.dll	%System%\amvo0.dll	Process name: explorer.exe Process filename: %Windir%\explorer.exe Address space: 0x2160000 - 0x2184000

Registry Modifications

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

amva = "%System%\amvo.exe"

so that amvo.exe runs every time Windows starts

The following Registry Value was modified:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]

CheckedValue =

Other details

The following Internet download was started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://www.om7890.com/fm4/help.rar	%Temp%\help.rar

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