ThreatExpert Report

Submission Summary:

Submission details:

Submission received: 7 November 2009, 15:38:44
Processing time: 7 min 52 sec
Submitted sample:

File MD5: 0xA4C18CB88FEC8EA077BC2ABF2DDB8C7F
File SHA-1: 0x89CFC8032CF3B1365A7C2849BFD3F7A4353E295C
Filesize: 356,352 bytes

Summary of the findings:

What's been found	Severity Level
Capability to perform DoS attacks against other computers.
Capability to terminate Antivirus, Firewall and other security related processes.
Replication across networks by exploiting weakly restricted shares (common for Randex family of worms).
Communication with a remote IRC server.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A network-aware worm that attempts to replicate across the existing network(s)
	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
1	%Windir%\pss\boot.ini.backup	211 bytes	MD5: 0xFA579938B0733B87066546AFE951082C SHA-1: 0x944710DBCD4A072F95A32EA9A23BB749E22D53B4
2	%Windir%\pss\system.ini.backup	231 bytes	MD5: 0xB143A6852C9EF93E0BDECB02F524F9F2 SHA-1: 0x83C15BD58DFF36C08DB093F81ECFD431C404A933
3	%Windir%\pss\win.ini.backup	477 bytes	MD5: 0x8715347D6B7B2E3A7CFE5ADF2D510CE3 SHA-1: 0x36C55AE9BD5F13E601A9C2FCB79B3237032D4AA7
4	%System%\msconfig.exe [file and pathname of the sample #1]	356,352 bytes	MD5: 0xA4C18CB88FEC8EA077BC2ABF2DDB8C7F SHA-1: 0x89CFC8032CF3B1365A7C2849BFD3F7A4353E295C

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).

The following file was modified:

%Windir%\system.ini

The following directory was created:

%Windir%\pss

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
msconfig.exe	%System%\msconfig.exe	1,179,648 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	1,179,648 bytes

Registry Modifications

The following Registry Keys were created:

[pathname with a string SHARE]\MSConfig
[pathname with a string SHARE]\services
[pathname with a string SHARE]\startupfolder
[pathname with a string SHARE]\startupreg
[pathname with a string SHARE]\state
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
HKEY_CURRENT_USER\Software\Microsoft\OLE

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole]

EnableRemoteConnect = "N"

[[pathname with a string SHARE]\state]

system.ini = 0x00000000
win.ini = 0x00000000
bootini = 0x00000000
services = 0x00000000
startup = 0x00000000

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

DRam prosessor = "msconfig.exe"

so that msconfig.exe runs every time Windows starts

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

DRam prosessor = "msconfig.exe"

so that msconfig.exe runs every time Windows starts

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

MaxConnectionsPer1_0Server = 0x00000050
MaxConnectionsPerServer = 0x00000050

[HKEY_CURRENT_USER\Software\Microsoft\OLE]

DRam prosessor = "msconfig.exe"

The following Registry Values were modified:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole]

EnableDCOM =

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa]

restrictanonymous =

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]

restrictanonymous =

Other details

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

N30Bot

The following port was open in the system:

Port	Protocol	Process
113	TCP	msconfig.exe (%System%\msconfig.exe)

The following Host Name was requested from a host database:

82.146.51.252

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

Remote Host	Port Number
82.146.51.252	51987

A system request is initiated to shut down and then restart the system.

Outbound traffic (potentially malicious)

Attention! There was a new connection established with a remote IRC Server. The generated outbound IRC traffic is provided below:

Heuristics Analysis

Heuristically identified capability of spreading across the following weakly restricted network shares:

The network replication uses a dictionary attack by probing credentials from the following list:

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