Submission Summary:

• Submission details:
• Submission received: 24 June 2008, 09:07:43
• Processing time: 3 min 18 sec
• Submitted sample:
• File MD5: 0x12D92417556D6490F445A2F44DA0EA38
• File SHA-1: 0xDF0955950D9D2DB3C95868282AC47292EA4C80AC
• Filesize: 309,248 bytes
• Alias: TROJ_VB.HEI [Trend Micro]

• Summary of the findings:

What's been found	Severity Level
A network-aware worm that uses known exploit(s) in order to replicate across vulnerable networks.
MS04-012: DCOM RPC Overflow exploit - replication across TCP 135/139/445/593 (common for Blaster, Welchia, Spybot, Randex, other IRC Bots).
MS04-011: LSASS Overflow exploit - replication across TCP 445 (common for Sasser, Bobax, Kibuv, Korgo, Gaobot, Spybot, Randex, other IRC Bots).
Capability to perform DoS attacks against other computers.
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! Characteristics of the following security risk was identified in the system:

• 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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\fada.exe [file and pathname of the sample #1]	309,248 bytes	MD5: 0x12D92417556D6490F445A2F44DA0EA38 SHA-1: 0xDF0955950D9D2DB3C95868282AC47292EA4C80AC	TROJ_VB.HEI [Trend Micro]

• Note:
• %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
fada.exe	%System%\fada.exe	1,605,632 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	1,605,632 bytes

Registry Modifications

• The following Registry Key was created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• (Default) = "fada.exe"

so that fada.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
• (Default) = "fada.exe"

so that fada.exe runs every time Windows starts

• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• (Default) = "fada.exe"

so that fada.exe runs every time Windows starts

Other details

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

• The following port was open in the system:

• The following Host Name was requested from a host database:
• l1nux.realsunix.com

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

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: