ThreatExpert Report: Worm.Win32.Zwr.c, Troj/Delf-FJQ, Trojan:Win32/Malex.gen!E, Trojan-Dropper.Delf

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Submission Summary:

Submission details:

Submission received: 3 October 2012, 06:17:42
Processing time: 7 min 44 sec
Submitted sample:

File MD5: 0x81BA5EDF4EDABF08E256CC8548113CEC
File SHA-1: 0xBA3DB385A6DFABA8258F1B2B889D5D15944F5076
Filesize: 194,560 bytes
Alias:

Worm.Win32.Zwr.c [Kaspersky Lab]
Troj/Delf-FJQ [Sophos]
Trojan:Win32/Malex.gen!E [Microsoft]
Trojan-Dropper.Delf [Ikarus]

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	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	%Profiles%\LocalService\Local Settings\Application Data\sLT.exf	32 bytes	MD5: 0x28E20FFA6E52E5B24CAB8602EEA821F4 SHA-1: 0xB20699ADCAB333D1CA22DE1178204D0F96D0F5C0	(not available)
2	%System%\drivers\svchost.exe [file and pathname of the sample #1]	194,560 bytes	MD5: 0x81BA5EDF4EDABF08E256CC8548113CEC SHA-1: 0xBA3DB385A6DFABA8258F1B2B889D5D15944F5076	Worm.Win32.Zwr.c [Kaspersky Lab] Troj/Delf-FJQ [Sophos] Trojan:Win32/Malex.gen!E [Microsoft] Trojan-Dropper.Delf [Ikarus]

Notes:

%Profiles% is a variable that refers to the file system directory containing user profile folders. A typical path is C:\Documents and Settings.
%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
svchost.exe	%System%\drivers\svchost.exe	221,184 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	221,184 bytes

There was a new service created in the system:

Service Name	Display Name	Status	Service Filename
Host Generic Process	Host Generic Process for Win32 Services	"Running"	%System%\drivers\svchost.exe

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_HOST_GENERIC_PROCESS
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_HOST_GENERIC_PROCESS\0000
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\Root\LEGACY_HOST_GENERIC_PROCESS\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Host Generic Process
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Host Generic Process\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Host Generic Process\Enum
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_HOST_GENERIC_PROCESS
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_HOST_GENERIC_PROCESS\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_HOST_GENERIC_PROCESS\0000\Control
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Host Generic Process
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Host Generic Process\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Host Generic Process\Enum

The newly created Registry Values are:

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

*NewlyCreated* = 0x00000000
ActiveService = "Host Generic Process"

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

Service = "Host Generic Process"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Host Generic Process for Win32 Services"

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

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Host Generic Process\Enum]

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

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Host Generic Process\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\Host Generic Process]

Type = 0x00000110
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%System%\drivers\svchost.exe"
DisplayName = "Host Generic Process for Win32 Services"
ObjectName = "LocalSystem"

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

*NewlyCreated* = 0x00000000
ActiveService = "Host Generic Process"

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

Service = "Host Generic Process"
Legacy = 0x00000001
ConfigFlags = 0x00000000
Class = "LegacyDriver"
ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
DeviceDesc = "Host Generic Process for Win32 Services"

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

NextInstance = 0x00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Host Generic Process\Enum]

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

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Host Generic Process\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\Host Generic Process]

Type = 0x00000110
Start = 0x00000002
ErrorControl = 0x00000001
ImagePath = "%System%\drivers\svchost.exe"
DisplayName = "Host Generic Process for Win32 Services"
ObjectName = "LocalSystem"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ServiceCurrent]

(Default) =

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent]

(Default) =

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]

Local AppData =

Other details

The following Host Name was requested from a host database:

192.5.5.241

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