ThreatExpert Report: Trojan-Downloader.Win32.Delf, New Malware.ca

Submission Summary:

Submission details:

Submission received: 10 September 2012, 21:06:25
Processing time: 8 min 13 sec
Submitted sample:

File MD5: 0xB67D2F29BEC72E9F2381FEA0C35B836D
File SHA-1: 0x5AF0404583B963957B9A170B23FAABFFD38C73CB
Filesize: 293,488 bytes
Alias: Trojan-Downloader.Win32.Delf [Ikarus]

Summary of the findings:

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

Technical Details:

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%ProgramFiles%\cqqsvr\cqqsvr.exe	476,160 bytes	MD5: 0x8CBD35F376CF8AB67E5446113247C3E4 SHA-1: 0xF91DE10C7D10FA4870E0AD584D6AE0B7AD416CB6	New Malware.ca [McAfee] Trojan-Downloader.Win32.Delf [Ikarus]
2	[file and pathname of the sample #1]	293,488 bytes	MD5: 0xB67D2F29BEC72E9F2381FEA0C35B836D SHA-1: 0x5AF0404583B963957B9A170B23FAABFFD38C73CB	Trojan-Downloader.Win32.Delf [Ikarus]

Note:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

The following directory was created:

%ProgramFiles%\cqqsvr

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]	151,552 bytes
cqqsvr.exe	%ProgramFiles%\cqqsvr\cqqsvr.exe	499,712 bytes

Registry Modifications

The following Registry Key was created:

HKEY_CURRENT_USER\Software\WinRAR SFX

The newly created Registry Values are:

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

QQ??????? = "%ProgramFiles%\cqqsvr\cqqsvr.exe"

so that cqqsvr.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\WinRAR SFX]

C%%Program Files%cqqsvr = "%ProgramFiles%\cqqsvr"

Other details

Analysis of the file resources indicate the following possible country of origin:

China

To mark the presence in the system, the following Mutex objects were created:

_SHuassist.mtx
uepwyudnsjnzmuepw

The following Host Name was requested from a host database:

192.5.5.241

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

Remote Host	Port Number
192.5.5.241	1033

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
adsvc1.uenet.info	80	(null)	(null)

The following GET requests were made:

ad/softad/popup.htm
count/softcount/?uepw
ad/softad/index.jpg
count/softcount/index.jpg

The following HTTP URL was started reading:

http://www.2345.com/?13654=

The following Internet downloads were started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://www.baidu.com	%ProgramFiles%\cqqsvr\bd.dat
http://adsvc1.uenet.info/ad/softad/pw.htm	%ProgramFiles%\cqqsvr\pw.dll

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