Submission Summary:

• Submission details:
• Submission received: 4 February 2010, 12:58:07
• Processing time: 6 min 55 sec
• Submitted sample:
• File MD5: 0x08BA612F05B0433A4A5CA2DF4DA38DEB
• File SHA-1: 0xBCDAFAABC91615255532111D4672FCEF7AEB9593
• Filesize: 56,320 bytes
• Alias:
• Trojan-Downloader.BotNet [PCTools]
• Backdoor.Trojan [Symantec]
• Backdoor.Win32.Small.ioa [Kaspersky Lab]
• Generic Downloader.x!brz [McAfee]
• Troj/Agent-LQA [Sophos]
• Win-Trojan/Downloader.56320.CP [AhnLab]

• Summary of the findings:

What's been found	Severity Level
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 malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

• The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%UserProfile%\reader_s.exe %System%\reader_s.exe [file and pathname of the sample #1]	56,320 bytes	MD5: 0x08BA612F05B0433A4A5CA2DF4DA38DEB SHA-1: 0xBCDAFAABC91615255532111D4672FCEF7AEB9593	Trojan-Downloader.BotNet [PCTools] Backdoor.Trojan [Symantec] Backdoor.Win32.Small.ioa [Kaspersky Lab] Generic Downloader.x!brz [McAfee] Troj/Agent-LQA [Sophos] Win-Trojan/Downloader.56320.CP [AhnLab]

• Notes:
• %UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (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).

Memory Modifications

• There were new processes created in the system:

Process Name	Process Filename	Main Module Size
reader_s.exe	%System%\reader_s.exe	49,152 bytes
reader_s.exe	%UserProfile%\reader_s.exe	49,152 bytes

Registry Modifications

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

so that reader_s.exe runs every time Windows starts

• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• reader_s = "%UserProfile%\reader_s.exe"

so that reader_s.exe runs every time Windows starts