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MSIL.Pizzer

Risk Level 1: Very Low

Discovered:
May 24, 2013
Updated:
May 27, 2013 1:40:03 PM
Type:
Worm
Infection Length:
20,480 bytes
Systems Affected:
Windows 2000, Windows 7, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
The worm requires .NET Framework version 2.0 or later to run.

When executed, the worm downloads a file from the following location:
[http://]sharkweektheband.com/admin/test[REMOVED]

It saves it as the following file and executes it:
%UserProfile%\Application Data\AudioDrivers.exe

It then creates the following registry entry, so that it runs every time Windows starts:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"Nividia Video Driver" = "[PATH TO WORM]\[WORM FILE NAME].exe"

Next, the worm downloads hack tools from the following locations to steal Facebook account information and passwords from Chrome, Firefox, and Internet Explorer:
  • [http://]176.31.115.28/FB/ChromeP[REMOVED]
  • [http://]176.31.115.28/FB/Passwor[REMOVED]
  • [http://]176.31.115.28/FB/iepv[REMOVED]

It then updates the Facebook Wall of the stolen account with the following message:
Lady Gaga PREGNANT?!?! see for yourself. [http://]authentication.myvnc.com/inde[REMOVED]

It also creates the following file:
%UserProfile%\Application Data\temp48.txt

It searches for all .zip and .rar files on all logical drives found on the compromised computer and injects itself into the archives if WinRAR is installed.

It then creates the following script file:
%UserProfile%\Application Data\s4c.vbs

The script file sends the following message to all contacts found in Skype:
omg! you have to see this.. [http://]authentication.myvnc.com/inde[REMOVED]

It copies itself as the following file with an autorun.inf file and sets the attributes of both files to hidden:
[LOGICAL DRIVE LETTER]:\ntldr.exe

Next, the worm copies itself as the following files:
  • C:\Documents and Settings\[USERNAME]\Local Settings\Application Data\Microsoft\Messenger\[FOLDER NAME]\mypornpics.scr
  • C:\Documents and Settings\[USERNAME]\Local Settings\Application Data\Microsoft\Yahoo Messenger\[FOLDER NAME]\ys.scr

Note: [FOLDER NAME] represents all folders located under the preceding folder.

It also copies itself as the following files:
  • %UserProfile%\My Documents\Downloads\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %UserProfile%\My Documents\My Shared Folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %UserProfile%\My Documents\Shared\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %UserProfile%\Application Data\Ares\My Shared Folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %UserProfile%\Desktop\Downloads\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\Shareaza\Downloads\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\emule\incoming\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\kazaa\my shared folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\kazaa lite\my shared folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\kazaa lite k++\my shared folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\icq\shared folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\grokster\my grokster\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\bearshare\shared\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\edonkey2000\incoming\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\morpheus\my shared folder\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\limewire\shared\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\tesla\files\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe
  • %ProgramFiles%\winmx\shared\[FOLDER NAME]\[THREAT FILE NAME]-crack.exe

Note:
  • [FOLDER NAME] represents all folders located under the preceding folder.
  • [THREAT FILE NAME] represents the name of all folder names found under %ProgramFiles%

The worm then connects to the following locations and downloads files:
  • [http://]176.31.115.28/u/System[REMOVED]
  • [http://]176.31.115.28/u/mine[REMOVED]
  • [http://]176.31.115.28/u/usft_e[REMOVED]
  • [http://]176.31.115.28/c/winap[REMOVED]
  • [http://]176.31.115.28/c/libcur[REMOVED]
  • [http://]176.31.115.28/c/libpdcu[REMOVED]
  • [http://]176.31.115.28/c/libusb-[REMOVED]
  • [http://]176.31.115.28/c/OpenC[REMOVED]
  • [http://]176.31.115.28/c/phatk12[REMOVED]
  • [http://]176.31.115.28/c/poclbm12[REMOVED]
  • [http://]176.31.115.28/c/pthread[REMOVED]
  • [http://]176.31.115.28/c/pthreadGC[REMOVED]

The files it downloads are saved as the following files:
  • %UserProfile%\Application Data\windll.exe
  • %UserProfile%\Application Data\miner.dll
  • %UserProfile%\Application Data\usft_ext.dll
  • %UserProfile%\Application Data\winapi.exe
  • %UserProfile%\Application Data\libcurl-4.dll
  • %UserProfile%\Application Data\libpdcurses.dll
  • %UserProfile%\Application Data\phatk120223.cl
  • %UserProfile%\Application Data\libusb-1.0.dll
  • %UserProfile%\Application Data\OpenCL.dll
  • %UserProfile%\Application Data\poclbm120327.cl
  • %UserProfile%\Application Data\pthreadGC2.dll
  • %UserProfile%\Application Data\pthreadGC2-w32.dll

The worm attempts to execute BitCoin mining programs and sends the created data to the following domain through port 8344:
eu.triplemining.com

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.
Writeup By: Takashi Katsuki
Summary| Technical Details| Removal

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