ThreatExpert Report: Malware.Imaut, W32.Imaut!gen1, Virus.Win32.Sality.aa, W32/Sality.gen..

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Submission Summary:

Submission details:

Submission received: 31 March 2011, 06:17:46
Processing time: 8 min 53 sec
Submitted sample:

File MD5: 0xFB2308358AE7F0EA73101E0F72AB00E0
File SHA-1: 0xED5673B01068F93CA06F36BFEA754B659F75903E
Filesize: 459,196 bytes
Alias:

Malware.Imaut [PCTools]
W32.Imaut!gen1 [Symantec]
Virus.Win32.Sality.aa [Kaspersky Lab]
W32/Sality.gen [McAfee]
PE_SALITY.BU [Trend Micro]
Virus:Win32/Sality.AM [Microsoft]
Trojan-Downloader.Win32.AutoIt [Ikarus]
Win32/Kashu.B [AhnLab]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Modifies some system settings that may have negative impact on overall system security state.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A virus capable to modify other files by infecting, prepending, or overwriting them them with its own body
	A program that downloads files to the local computer that may represent security risk
	A network-aware worm that attempts to replicate across the existing network(s)

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\000199CA_Rar\[filename of the sample #1] %Temp%\0002FBDA_Rar\SCVHSOT.exe %Temp%\00033365_Rar\[filename of the sample #1] %Temp%\00033394_Rar\scvhsot.exe %Temp%\000333E2_Rar\hinhem.scr %Temp%\000334EC_Rar\blastclnnn.exe %Windir%\hinhem.scr %Windir%\SCVHSOT.exe %System%\blastclnnn.exe [file and pathname of the sample #1] %System%\SCVHSOT.exe	459,196 bytes	MD5: 0xFB2308358AE7F0EA73101E0F72AB00E0 SHA-1: 0xED5673B01068F93CA06F36BFEA754B659F75903E	Malware.Imaut [PCTools] W32.Imaut!gen1 [Symantec] Virus.Win32.Sality.aa [Kaspersky Lab] W32/Sality.gen [McAfee] PE_SALITY.BU [Trend Micro] W32/Sohana-AM [Sophos] Virus:Win32/Sality.AM [Microsoft] Trojan-Downloader.Win32.AutoIt [Ikarus] Win32/Kashu.B [AhnLab]
2	%Temp%\0003349E_Rar\scvhsot.exe	389,564 bytes	MD5: 0xBCF96266C92F4DB2A60FC82E72C3EB2C SHA-1: 0xFF31B530E97370B07EF95C03A9826FD8A53AD454	Malware.Blastclan!rem [PCTools] W32.Blastclan [Symantec] Trojan-Downloader.Win32.AutoIt.q [Kaspersky Lab] W32/YahLover.worm.gen [McAfee] WORM_SOHANAD.BZ [Trend Micro] W32/Sohana-AM [Sophos] Trojan-Downloader.Win32.AutoIt [Ikarus] Win-Trojan/Autoit.389564 [AhnLab]
3	%System%\autorun.ini	100 bytes	MD5: 0x1F7B2B0B7FDB9E6AB44F27FA034A9834 SHA-1: 0xDD2EBD286F752AFB45F4675886BD5A520FC9422A	Trojan.Autorun!ct [PCTools] Worm.Win32.AutoRun.dkp [Kaspersky Lab] W32/Hakaglan.inf [McAfee] Worm.Win32.AutoRun [Ikarus]
4	%System%\setting.ini	11,362 bytes	MD5: 0x7AD04AD5DB5F28B34EEED166D387BEA2 SHA-1: 0x626161981CBE78C546B05FC1730C4715C631D8FB	(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.
%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).

The following files were modified:

%Windir%\system.ini
%System%\cmd.exe
%System%\mmc.exe
%System%\taskmgr.exe

The following directories were created:

%Temp%\00033365_Rar
%Temp%\00033394_Rar
%Temp%\000333E2_Rar
%Temp%\0003349E_Rar
%Temp%\000334EC_Rar
%Temp%\000199CA_Rar
%Temp%\0002FBDA_Rar

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]	561,152 bytes
SCVHSOT.exe	%System%\scvhsot.exe	561,152 bytes
hinhem.scr	%Windir%\hinhem.scr	561,152 bytes
SCVHSOT.exe	%Windir%\scvhsot.exe	561,152 bytes
blastclnnn.exe	%System%\blastclnnn.exe	561,152 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system
HKEY_CURRENT_USER\Software\%UserName%914
HKEY_CURRENT_USER\Software\%UserName%914\-72398023

Notes:

%UserName% is a variable that refers to the current user name.

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center]

UacDisableNotify = 0x00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc]

AntiVirusOverride = 0x00000001
AntiVirusDisableNotify = 0x00000001
FirewallDisableNotify = 0x00000001
FirewallOverride = 0x00000001
UpdatesDisableNotify = 0x00000001
UacDisableNotify = 0x00000001

to disable notification of firewall, antivirus and/or update status through the Windows Security Center

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]

EnableLUA = 0x00000000

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]

NofolderOptions = 0x00000001

to remove the Folder Options item from all Windows Explorer menus and from Control Panel

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system]

DisableTaskMgr = 0x00000001
DisableRegistryTools = 0x00000001

to prevent users from starting Task Manager (Taskmgr.exe)

to disable the Windows registry editors (Regedt32.exe and Regedit.exe)

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

Yahoo Messengger = "%System%\SCVHSOT.exe"

so that SCVHSOT.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\%UserName%914\-72398023]

1919251285 = 0x0000002A
-456464726 = 0x00000000
1462786559 = 0x00000000
-912929452 = 0x00000023
1006321833 = 0x000000E3
-1369394178 = "0600687474703A2F2F7777772E6D7573696B72616A742E736B2F6D61696E662E67696600687474703A2F2F6D616365646F6E69612E6D79312E72752F6D61696E682E67696600687474703A2F2F6A7273782E6A72652E6E65742E636E2F6C6F676F732E67696600687474703A2F2F7777772E6D7573696B72616A742E7
549857107 = "865E52A75BF33F5D5AA15DAFA722193EDDA8540E6C496C04CF492EF296AFD1AFDEDBC79CEA25E0F6F53B2D9CC0FA963F3A4CC745615E85AFE1E18AEA7E620D11174F3892E84B5B5DD288784938E304B2D65C454E833D6AF929809110987E5B4B3E4D581071DA4948CB9F84287242DDEC0BA4741B5D7BD0FCF8CC57DAB

[HKEY_CURRENT_USER\Software\%UserName%914]

U1_0 = 0xCC96283A
U2_0 = 0x0000158D
U3_0 = 0x01036A29
U4_0 = 0x00000000

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center]

AntiVirusOverride =
FirewallOverride =

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]

Shell =

Other details

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

United Kingdom

The following ports were open in the system:

Port	Protocol	Process
1054	TCP	[file and pathname of the sample #1]
1055	TCP	[file and pathname of the sample #1]
1059	TCP	SCVHSOT.exe (%System%\SCVHSOT.exe)
1066	TCP	hinhem.scr (%Windir%\hinhem.scr)
1076	TCP	blastclnnn.exe (%System%\blastclnnn.exe)
1077	TCP	scvhsot.exe (%Windir%\scvhsot.exe)
5703	UDP	[file and pathname of the sample #1]

There were registered attempts to establish connection with the remote hosts. The connection details are:

Remote Host	Port Number
216.52.115.15	80
216.52.115.2	80

The following HTTP URLs were started reading:

http://setting3.9999mb.com/setting.doc
http://setting3.9999mb.com/setting.xls

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

http://www.webs.com/abuseFrozen.htm?uname=setting3
http://www.freewebs.com/setting3/setting.doc
http://www.freewebs.com/setting3/setting.xls

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