Submission Summary:

• Submission details:
• Submission received: 15 September 2009, 22:03:30
• Processing time: 6 min 0 sec
• Submitted sample:
• File MD5: 0x47612F2E3F52025EBD5A97DA56697510
• File SHA-1: 0xB242E2C6DBCB6FC93890AE41DB9C37CC9A18EF53
• Filesize: 48,128 bytes
• Alias:
• Backdoor.Coreflood [Symantec]
• Trojan.Win32.AF.20 [Kaspersky Lab]
• Troj/CoreFlo-O [Sophos]
• Trojan:Win32/AF.2_0 [Microsoft]
• Trojan.Win32.AF.20 [Ikarus]
• Win-Trojan/Af.49034 [AhnLab]

• Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
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 malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\aacmeyf	16 bytes	MD5: 0xCC4A5A97D664147B8F5A5FC85BD2FDCD SHA-1: 0xFD5604E9B15AB3BFD2D52C97BE3028C9C05EC139	(not available)
2	%Temp%\aacmeyf.dll	44,544 bytes	MD5: 0x6C9CD8AF3031919A9D0C87A9D261E827 SHA-1: 0x61A367E46FA43F1D8F89E00AAFA0A65AAB8541E9	Trojan Horse [Symantec] Trojan.Win32.AF.20 [Kaspersky Lab] CoreFlood.dll [McAfee] Troj/Afcore-Gen [Sophos] Trojan:Win32/CoreFlood [Microsoft] Trojan.Win32.AF [Ikarus] Win-Trojan/Af.44544 [AhnLab]
3	%Temp%\aacmeyf.exe %System%\aacmeyf.exe [file and pathname of the sample #1]	48,128 bytes	MD5: 0x47612F2E3F52025EBD5A97DA56697510 SHA-1: 0xB242E2C6DBCB6FC93890AE41DB9C37CC9A18EF53	Backdoor.Coreflood [Symantec] Trojan.Win32.AF.20 [Kaspersky Lab] Troj/CoreFlo-O [Sophos] Trojan:Win32/AF.2_0 [Microsoft] Trojan.Win32.AF.20 [Ikarus] Win-Trojan/Af.49034 [AhnLab]

• 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).
• %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).

Registry Modifications

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• aacmeyf = "%System%\aacmeyf.exe"

so that aacmeyf runs every time Windows starts

• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• aacmeyf = "%Temp%\aacmeyf.exe"

so that aacmeyf runs every time Windows starts

Other details

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

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 6667: