ThreatExpert Report: Worm.AutoRun.ADQ, W32.Sality.AE, Trojan.Win32.Agent.cru, W32/Sality.gen..

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Submission Summary:

Submission details:

Submission received: 23 May 2009, 18:09:46
Processing time: 7 min 4 sec
Submitted sample:

File MD5: 0x6F141A4E646C5859B3642F8E622CE38B
File SHA-1: 0x3A3FC38A15378CCE1D4BD1824B65AD06025A25E7
Filesize: 474,845 bytes
Alias:

Worm.AutoRun.ADQ [PCTools]
W32.Sality.AE [Symantec]
Trojan.Win32.Agent.cru [Kaspersky Lab]
W32/Sality.gen [McAfee]
PE_SALITY.EN-1 [Trend Micro]
W32/Sality-AM [Sophos]
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! Characteristics of the following security risk was identified in the system:

Security Risk

Description

Worm.IM.Sohanad

Worm.IM.Sohanad spreads via Yahoo Messenger and infects Windows. It sends a message to all Yahoo Messenger contacts of an infected user. The message contains a link enticing users to download the worm. The worm also disable certain Windows functionalities abd hijacks Internet Explorer homepage. It also downloads other maware and it will also attempt to propagate via the means of creating copies of itself onto removable devices such as USB flash and hard drives.

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	%Windir%\hinhem.scr %Windir%\scvshosts.exe %System%\blastclnnn.exe [file and pathname of the sample #1] %System%\scvshosts.exe	474,845 bytes	MD5: 0x6F141A4E646C5859B3642F8E622CE38B SHA-1: 0x3A3FC38A15378CCE1D4BD1824B65AD06025A25E7	Worm.AutoRun.ADQ [PCTools] W32.Sality.AE [Symantec] Trojan.Win32.Agent.cru [Kaspersky Lab] W32/Sality.gen [McAfee] PE_SALITY.EN-1 [Trend Micro] W32/Sality-AM [Sophos] Virus:Win32/Sality.AM [Microsoft] Trojan-Downloader.Win32.AutoIt [Ikarus] Win32/Kashu.B [AhnLab]
2	%System%\autorun.ini	106 bytes	MD5: 0x461844E7B27354FFB9B1F5CAFC529C64 SHA-1: 0xF3EE2F507999A91AD23366C65F06159D79EC5478	Generic!atr [McAfee] W32/Trax-A [Sophos] Trojan.Autoit.SN [Ikarus]
3	%Windir%\Tasks\At1.job	354 bytes	MD5: 0xB374D2345E31303C7A266F5F63F683BB SHA-1: 0x63E31DAEFCAAF46FFF83326087E80904D699E6A1	(not available)
4	%Windir%\Tasks\At2.job	354 bytes	MD5: 0x6AD2C99991EAFDACCF28A1F34456CB5B SHA-1: 0xAE75C8A4A3DEDD74E7B8F18CF84856CD40337B84	(not available)
5	%Windir%\Tasks\At3.job	354 bytes	MD5: 0xA2A524E27A9DD63F1DCFE7F19102850E SHA-1: 0xCE3DA3E905A7FE8C747FF2721BB56884F9A84A0D	(not available)

Notes:

%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).

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]	684,032 bytes
scvshosts.exe	%System%\scvshosts.exe	684,032 bytes
hinhem.scr	%Windir%\hinhem.scr	684,032 bytes
scvshosts.exe	%Windir%\scvshosts.exe	684,032 bytes
blastclnnn.exe	%System%\blastclnnn.exe	684,032 bytes

Registry Modifications

The following Registry Key was created:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

The newly created Registry Values are:

[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%\scvshosts.exe"

so that scvshosts.exe runs every time Windows starts

The following Registry Value was modified:

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

Shell = "Explorer.exe scvshosts.exe"

so that scvshosts.exe runs every time Windows starts

Other details

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

United Kingdom

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

Op1mutx9

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

http://setting3.yeahost.com/setting.doc
localhost
http://setting3.yeahost.com/setting.xls
http://setting3.9999mb.com/setting.doc
http://setting3.9999mb.com/setting.xls
http://www.freewebs.com/setting3/setting.doc
http://www.freewebs.com/setting3/setting.xls

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