ThreatExpert Report: Trojan.Drondog

Submission Summary:

Submission details:

Submission received: 25 May 2008, 12:48:42
Processing time: 8 min 59 sec
Submitted sample:

File MD5: 0x1C355173DD3D23A70334498684E30A54
File SHA-1: 0x46D4CD56C1D0EEA999D9335D1BBAB9B48B4BA7EB
Filesize: 25,600 bytes
Alias: Trojan.Drondog [Symantec]

Summary of the findings:

What's been found	Severity Level
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

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	%Temp%\WER5a09.dir00\manifest.txt	1,320 bytes	MD5: 0x2A8054425CE5BC35EEA4EE17DD9F7AE1 SHA-1: 0xFD5B2578958E9E1F9B73D2AAC0D3C83A9B2BDFA6	(not available)
2	%Temp%\WER5a09.dir00\sysdata.xml	112,448 bytes	MD5: 0x68AD1FB3CC26B0504046E1BB9AB2DBD8 SHA-1: 0xAA69C79ABA954765797FC370C7C3F9219C0B18C4	(not available)
3	%Windir%\Nt_File_Temp\hook.sys	10,496 bytes	MD5: 0x78CE1A3D9A2A6BD4047856E437BD7D1A SHA-1: 0xC9A76ADA67FE4BA85DCFFFB49B20DCA55F79A023	Trojan.Drondog [Symantec]
4	%Windir%\Nt_File_Temp\__write_ok__	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
5	[file and pathname of the sample #1]	25,600 bytes	MD5: 0x1C355173DD3D23A70334498684E30A54 SHA-1: 0x46D4CD56C1D0EEA999D9335D1BBAB9B48B4BA7EB	Trojan.Drondog [Symantec]

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.

The following directories were created:

%Temp%\WER5a09.dir00
%Windir%\Nt_File_Temp

Memory Modifications

There was a new kernel-mode driver installed in the system:

Driver Name	Driver Filename
hook	%Windir%\Nt_File_Temp\hook.sys

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\hook
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\hook\Security
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\hook
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\hook\Security

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\hook\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\hook]

Type = 0x00000001
Start = 0x00000003
ErrorControl = 0x00000001
ImagePath = "%Windir%\Nt_File_Temp\hook.sys"
DisplayName = "hook"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\hook\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\ControlSet002\Services\hook]

Type = 0x00000001
Start = 0x00000003
ErrorControl = 0x00000001
ImagePath = "%Windir%\Nt_File_Temp\hook.sys"
DisplayName = "hook"

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