ThreatExpert Report: Generic Dropper!1zb, VirTool:Win32/CeeInject.gen!IH..

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Submission Summary:

Submission details:

Submission received: 22 October 2012, 11:45:21
Processing time: 9 min 48 sec
Submitted sample:

File MD5: 0x6650CD41F028DEA04762FFA5DB1CC01A
File SHA-1: 0xA2D3C257BEF69B8BB6DD2EADE86F8CEF80AA175B
Filesize: 48,640 bytes
Alias:

Generic Dropper!1zb [McAfee]
VirTool:Win32/CeeInject.gen!IH [Microsoft]
Trojan-Dropper.Win32.Dapato [Ikarus]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Creates a startup registry entry.

Technical Details:

The new window was created, as shown below:

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File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\explorer.exe [file and pathname of the sample #1]	48,640 bytes	MD5: 0x6650CD41F028DEA04762FFA5DB1CC01A SHA-1: 0xA2D3C257BEF69B8BB6DD2EADE86F8CEF80AA175B	Generic Dropper!1zb [McAfee] VirTool:Win32/CeeInject.gen!IH [Microsoft] Trojan-Dropper.Win32.Dapato [Ikarus]

Note:

%AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	40,960 bytes
explorer.exe	%AppData%\explorer.exe	40,960 bytes

Registry Modifications

The newly created Registry Value is:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

Windows = "%AppData%\explorer.exe"

so that explorer.exe runs every time Windows starts

Other details

To mark the presence in the system, the following Mutex object was created:

_!SHMSFTHISTORY!_

The following ports were open in the system:

Port	Protocol	Process
1037	TCP	[file and pathname of the sample #1]
1038	UDP	[file and pathname of the sample #1]
1131	TCP	explorer.exe (%AppData%\explorer.exe)
1132	UDP	explorer.exe (%AppData%\explorer.exe)
1155	TCP	explorer.exe (%AppData%\explorer.exe)
1156	UDP	explorer.exe (%AppData%\explorer.exe)

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
locked.ran-som.com	80	(null)	(null)

The following GET requests were made:

40B373838BB67DB89A8ACB6ECA862CFF0BFFA4F9E40E4E06EC21955C785FC4D5/unlocked.php
40B373838BB67DB89A8ACB6ECA862CFF0BFFA4F9E40E4E06EC21955C785FC4D5/
40B373838BB67DB89A8ACB6ECA862CFF0BFFA4F9E40E4E06EC21955C785FC4D5/index.jpg

There were application-defined hook procedures installed into the hook chain (e.g. to monitor keystrokes). The installed hooks are handled by the following modules:

%AppData%\explorer.exe
[file and pathname of the sample #1]

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