ThreatExpert Report: FakeAlert-AB.dldr, Mal/Pushdo-A, Trojan:Win32/Cutwail.AQ, Trojan-Dropper.Agent

Submission Summary:

Submission details:

Submission received: 19 November 2008, 11:54:57
Processing time: 6 min 5 sec
Submitted sample:

File MD5: 0x70AFB6FA8A500CCE2120448C6A085600
File SHA-1: 0x50743360360020121C95FF42BAC8F1C63233220C
Filesize: 22,528 bytes
Alias:

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! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Trojan-Downloader.Agent.BWH	Trojan-Downloader.Agent.BWH contacts a remote server in its attempt to secretly download additional threats onto affected machines.

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\rs32net.exe [file and pathname of the sample #1]	22,528 bytes	MD5: 0x70AFB6FA8A500CCE2120448C6A085600 SHA-1: 0x50743360360020121C95FF42BAC8F1C63233220C	FakeAlert-AB.dldr [McAfee] Mal/Pushdo-A [Sophos] Trojan:Win32/Cutwail.AQ [Microsoft] Trojan-Dropper.Agent [Ikarus]

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
rs32net.exe	%System%\rs32net.exe	28,672 bytes
[filename of the sample #1]	[file and pathname of the sample #1]	28,672 bytes

Registry Modifications

The newly created Registry Value is:

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

rs32net = "%System%\rs32net.exe"

so that rs32net.exe runs every time Windows starts

Other details

There were registered attempts to establish connection with the remote hosts. The connection details are:

Remote Host	Port Number
216.195.55.50	80
208.66.194.240	80
216.195.56.22	80

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