ThreatExpert Report: Backdoor.Win32.Sinowal

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Submission Summary:

Submission details:

Submission received: 30 September 2012, 18:53:53
Processing time: 8 min 12 sec
Submitted sample:

File MD5: 0x8C37AFD0C80182F5F5FAD7672D571A5E
File SHA-1: 0xEF32AA6A10F3CE23ED5434386850F09549CA0497
Filesize: 116,004 bytes
Alias: Backdoor.Win32.Sinowal [Ikarus]

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\199640.bat %AppData%\codigo.bat	6,916 bytes	MD5: 0x81214C48C6F7647F8435FE1EFADD7087 SHA-1: 0x1D9DB9E1BB93AB5EEC3D29C42071A0ED6BAAE017	(not available)
2	%Temp%\Setup.exe	90,112 bytes	MD5: 0x2508757A1DB608645711711FC994C020 SHA-1: 0x9897BCB5F5014CF833C68668331DBB95F44FF953	Backdoor.Win32.Sinowal [Ikarus] packed with WScript [Kaspersky Lab]
3	%Temp%\thunb.db	666 bytes	MD5: 0x9E1E5883C74742A497CF5C272CCD2321 SHA-1: 0x2CF33E34D08B8E17743A60352BAFFEF4B6F02DEE	(not available)
4	%Temp%\tmp.vbs	22 bytes	MD5: 0xB6D627C8F36C528BEECAF92698ACC9E2 SHA-1: 0xBAF1B1FC0E5C2B660A7C3CDC49315861D0DD3E79	(not available)
5	[file and pathname of the sample #1]	116,004 bytes	MD5: 0x8C37AFD0C80182F5F5FAD7672D571A5E SHA-1: 0xEF32AA6A10F3CE23ED5434386850F09549CA0497	Backdoor.Win32.Sinowal [Ikarus]

Notes:

%AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
%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).

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
Setup.exe	%Temp%\setup.exe	118,784 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	208,896 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bb
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bradesco
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.hsbc
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.itau
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santander
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santanderempresarial
HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host
HKEY_CURRENT_USER\Software\Microsoft\Windows Script Host\Settings
HKEY_CURRENT_USER\Software\WinRAR SFX

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

FacebookUpdate = "%Temp%\fbupdate.exe"

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]

WarnonBadCertRecving = 0x00000000
WarnOnIntranet = 0x00000000

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]

AutoDetect = 0x00000000

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santanderempresarial]

http = 0x00000002

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.santander]

http = 0x00000002

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.itau]

http = 0x00000002

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.hsbc]

http = 0x00000002

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bradesco]

http = 0x00000002

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\com.br\*.bb]

http = 0x00000002

[HKEY_CURRENT_USER\Software\WinRAR SFX]

C%%DOCUME~1%%UserName%%LOCALS~1%Temp% = "%Temp%\"

Other details

To mark the presence in the system, the following Mutex objects were created:

_SHuassist.mtx
_!SHMSFTHISTORY!_

The following Host Name was requested from a host database:

192.5.5.241

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
192.5.5.241	1033

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
pop.rapid-confirm.com	80	(null)	(null)

The following GET requests were made:

ok.php?a=UserName&b=COMPUTERNAME&c=
index.jpg

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