Submission Summary:

• Submission details:
• Submission received: 22 February 2010, 16:22:34
• Processing time: 9 min 16 sec
• Submitted sample:
• File MD5: 0xC2BAE2E0754C1E32AF700530CDBAE293
• File SHA-1: 0x9C4E406A7792B0666811090AD0FF078E82B81058
• Filesize: 12,288 bytes
• Alias:
• Worm.Hamweg.Gen [PCTools]
• W32.SillyFDC [Symantec]
• Worm.Win32.AutoRun.avrn [Kaspersky Lab]
• W32/Autorun.worm.gc [McAfee]
• W32/Autoham-Fam [Sophos]
• Worm:Win32/Hamweq.A [Microsoft]
• Worm.Win32.AutoRun [Ikarus]
• Win-Trojan/Hamweq.12288.C [AhnLab]

• Summary of the findings:

What's been found	Severity Level
Creates desktop.ini system file in the fake Recycle Bin folder in order to register it in Windows as a valid Recycle Bin.
Creates an executable file in the fake Recycle Bin folder with the purpose of concealing its presence in the system.
Creates fake Recycle Bin folder.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

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	c:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini	62 bytes	MD5: 0x7457A5DF1FF47C957ACF1FA000D7D9AD SHA-1: 0x69D2BBA827FD4DE0169419A0FDA280252B348514	(not available)
2	c:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\SYS83.exe [file and pathname of the sample #1]	12,288 bytes	MD5: 0xC2BAE2E0754C1E32AF700530CDBAE293 SHA-1: 0x9C4E406A7792B0666811090AD0FF078E82B81058	Worm.Hamweg.Gen [PCTools] W32.SillyFDC [Symantec] Worm.Win32.AutoRun.avrn [Kaspersky Lab] W32/Autorun.worm.gc [McAfee] W32/Autoham-Fam [Sophos] Worm:Win32/Hamweq.A [Microsoft] Worm.Win32.AutoRun [Ikarus] Win-Trojan/Hamweq.12288.C [AhnLab]

• The following directory was created:
• c:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013

Registry Modifications

• The following Registry Key was created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{28ABC5C0-4FCB-33CF-AAX5-35GX1C642122}

• The newly created Registry Value is:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{28ABC5C0-4FCB-33CF-AAX5-35GX1C642122}]
• StubPath = "c:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\SYS83.exe"

so that SYS83.exe runs every time Windows starts