ThreatExpert Report: Trojan:Win32/Ramnit.A, Backdoor.Win32.Azbreg, Mal/FakeConf-A

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Submission Summary:

Submission details:

Submission received: 14 August 2012, 07:11:30
Processing time: 7 min 35 sec
Submitted sample:

File MD5: 0xA0A93FA65E49229AF784B5EE48169E07
File SHA-1: 0x610B7087175E164BF48F4ACC6599D30FEF7909B1
Filesize: 93,556 bytes
Alias:

Trojan:Win32/Ramnit.A [Microsoft]
Backdoor.Win32.Azbreg [Ikarus]

Summary of the findings:

What's been found	Severity Level
Creates a startup registry entry.

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%CommonAppData%\bcemswbv.log	64 bytes	MD5: 0xB1DD04F9565E83A7FE382D40CE2A30DD SHA-1: 0x64D9AC4D333ADE57F819AB7AC3FAF8E052D6E721	(not available)
2	%AppData%\errjojsk\mxjvyjcb.exe %Temp%\edeqelbh.exe %Programs%\Startup\mxjvyjcb.exe [file and pathname of the sample #1]	93,556 bytes	MD5: 0xA0A93FA65E49229AF784B5EE48169E07 SHA-1: 0x610B7087175E164BF48F4ACC6599D30FEF7909B1	Trojan:Win32/Ramnit.A [Microsoft] Backdoor.Win32.Azbreg [Ikarus]
3	%AppData%\nbvouitu.log	24 bytes	MD5: 0xDF8781B8101D6B06B2B32265CBA33F54 SHA-1: 0x750A65E3FB5233D85507C1954DF1CE585D95AAF8	Mal/FakeConf-A [Sophos]
4	%AppData%\oracnfbu.log	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)

Notes:

%CommonAppData% is a variable that refers to the file system directory containing application data for all users. A typical path is C:\Documents and Settings\All Users\Application Data.
%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).
%Programs% is a variable that refers to the file system directory that contains the user's program groups. A typical path is C:\Documents and Settings\[UserName]\Start Menu\Programs.

The following directory was created:

%AppData%\errjojsk

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service\Enum

The newly created Registry Values are:

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

EnableLUA = 0x00000000

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "Micorsoft Windows Service"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000]

Service = "Micorsoft Windows Service"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Micorsoft Windows Service"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service\Enum]

0 = "Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Micorsoft Windows Service]

Type = 0x00000001
Start = 0x00000004
ErrorControl = 0x00000000
ImagePath = "\??\%Temp%\tjhdcgun.sys"
DisplayName = "Micorsoft Windows Service"
DeleteFlag = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000\Control]

*NewlyCreated* = 0x00000000
ActiveService = "Micorsoft Windows Service"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000]

Service = "Micorsoft Windows Service"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Micorsoft Windows Service"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MICORSOFT_WINDOWS_SERVICE]

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service\Enum]

0 = "Root\LEGACY_MICORSOFT_WINDOWS_SERVICE\0000"
Count = 0x00000001
NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Micorsoft Windows Service]

Type = 0x00000001
Start = 0x00000004
ErrorControl = 0x00000000
ImagePath = "\??\%Temp%\tjhdcgun.sys"
DisplayName = "Micorsoft Windows Service"
DeleteFlag = 0x00000001

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

MxjVyjcb = "%AppData%\errjojsk\mxjvyjcb.exe"

so that mxjvyjcb.exe runs every time Windows starts

The following Registry Value was modified:

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

Userinit =

Other details

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

Bulgaria

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

{19767501-5B71-7A19-AEFE-0C985A1C50FD}

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