3rd UPDATE: Cyber Espionage Reaches New Levels with Flamer

Download the 32-bit or the 64-bit removal tools and find out if you’re infected with  Flamer, the world’s most discrete and dangerous piece of malware ever. If you are already protected by a Bitdefender security solution, you do not need to run the removal tool.

Update 3:  Today we’ll present an overview of two info-stealer components that are bundled with FLAME: flask and jimmy. These components may also be started on other computers on the network if the infected PC manages to successfully exploit the MS10-061 bug (the very printer spooler exploit used by Stuxnet) . The attack across the network is orchestrated by the clanattack component.

  • FLASK

This module is an info-stealer that harvests every bit of information available on an infected system. We are not talking here about document theft, as there are other components in charge with this (such as JIMMY and BOOST), which will be described later.

The binary component associated with FLASK is  rpcns4.ocx, that exports a single function only: RpcNsBindingInit. It is written in the same manner as the main module and features encrypted strings that are decrypted in DllEntry.

Like the other FLAME modules, FLASK gets copied in the temporary folder of the infected machine under the name ~mso2a2.tmp.

It records a wide range of information:

Generic system information :

  • local time
  • list of volumes, their serial number and FileSystem name
  • OS Version, Service Pack Number
  • Computer Name
  • the list of running processes
  • a list of user-mode services and their state
  • a list of applications from %AppData%
  • Internet Explorer, Microsoft Outlook and Microsoft Word versions
  • CodePage of the system (can be used for localization)
  • entries from %Program Files% directory
  • Time Zone Information

Information related to networking:

  •  information about Remote Desktop Services (if it’s enabled, the listening port and others) and Windows Firewall (if it’s enabled, firewall exceptions)
  • open TCP/UDP Connections
  • information about the interfaces : MAC Address, IP Address, Gateway Address,
  • Primary WINS  Server Address, Secondary WINS Server Address, DHCP Server Address (if enabled), statistics about the transferred packets, in the case of WiFi adapters their PNP ID, the name of the adapter, subnet mask,
  • IP routing information including persistent IP routing tables, IP Forward Table
  •  list of DNS servers
  •  the contents of %windir%\system32\drivers\etc\hosts
  • the SSIDs stored in registry
  • domain information: the domain name to which the computer belongs, user account name, name of computer, group name, the Domain Controller Name
  • the local hostname
  • Dial-Up information
  • Proxy Server list
  • the links from “My Network Places”
  • cached DNS data table
  •  the list of visible network share names and their addresses
  • names of files opened in Internet Explorer (from the URL cache)
  • a list of printers to which the computer is connected
  • the POP3 Server Name and SMTP Mail Address of the accounts used in MS Outlook
  • information about disks(name, free space available, .. )
  • cookies from yahoo.com
  • Internet Explorer saved and protected data
  • various data (mainly related to server addresses and passwords) grabbed from the Registry for the following programs:

Inno Setup
VNC
PenguiNet
RageWork File Manager
NetServe FTP Client
Jildi FTP Client
Cyd FTP Client
AceFTP 3 FreeWare
Intersoft Secure Key Agent
DameWare Nt Utilities
Bitkinex 2.7
SmartFTP
VanDyke SecureCrt
Ipswitch WS_FTP
BulletProof Ftp Client
CuteFTP
FTP Explorer
Robo Ftp
SoftX.org FTP Client
Mssh
Emurasoft EmFTP
Netx NetserverFtpClient
Web Drive From South River Technologies
WinScp2 (Martin Prikryl)
TeamViewer
RADMin

  • if the victim has installed mobile telephone applications (Nokia PC Suite, Sony Ericson PC Suite), this information will be present
  • Will also test if ipcsvnt32.dll is found in %windir%\system32, which may be another component

Collected date is encrypted using RC4 and is finally encoded with a modified base64 algorithm.

An interesting aspect is the large amount of information that this component retrieves from the compromised system. The malware authors probably want to build a “profile” of the victims (for instance, details like the visited websites can often reveal the victim’s habits and interests), so they can build up advanced spear phishing attacks.  It is also possible that, based on the initial information received, the Flask component was continually updated to retreive intelligence from other remote administration tools that are used by the targeted companies.

  • JIMMY

This component is designed for leaking data. Files to be leaked are the ones with the following extensions: *.doc, *.docx, *.xls, *.dwg, *.kml *.ppt, *.csv, *.txt, *.url, *.pub, *.rdp, *.ssh, *.ssh2, *.vsd, *.ora, *.eml.

Please note that jimmy also leaks KML files (formats that are used to view geographic data in Google Earth). AutoDesk files (.dwg) which store three-dimensional layouts and plans are also leaked.

Several directories are skipped if found: %windir%,  RECYCLER, $Recycle.Bin, %temp%, System Volume, %programfiles%, I386, Comodo.

Text-based information is extracted from documents using IFilters. There are filters that can handle the most common file formats such as doc, ppt, pps, vsd, or dwg. Files that usually hold plain-text information are extracted as a whole.

The content grabed is stored in dra52.tmp and then is compressed using the PPMd algorithm. The choice of PPMd is probably due to the fact because it has very good results compressing text.

File search is stopped if one of the processes is started: Procexp.exe, AntiHook.exe, SpywareTerminator.Exe, SpywareTerminatorShield.Exe, jpf.exe, etc.

This is a security precaution undertaken by the malware, as searching almost everywhere for files may trigger detection in some security solutions.

Stay tuned for new updates on this espionage machinery!

Update 2: As we’re digging into Flamer.A, new details about the piece’s modus operandi surface. The team working on it have uncovered that several components use an internal list called NetworkTypeIdentifier. This list references high-profile web sites such as *.overture.* , *.gmail.*, *.hotmail.* , *.bbc.co.* , *.bbc.co.* that are probed in order to get information about the bandwidth capabilities of the connection. However, the list also references three Iranian websites (*.baztab.* , *.maktoob.* , *.gawab.*) , which confirms once again that Iran was one of the designated targets.

  • EUPHORIA

Closer inspection of the EUPHORIA module revealed that it controls the spreading mechanism via USB sticks. The USB spreading capabilities are re-enforced with a secondary component called AUTORUN_INFECTOR that is being used to exploit the operating system’s Autorun feature.

[fragment of the configuration file for the EUPHORIA module]
EUPHORIA.PayloadNamesList.1.data.PayloadName           string  Lss.ocx
EUPHORIA.PayloadNamesList.2.data.PayloadName           string  System32.dat
EUPHORIA.PayloadNamesList.3.data.PayloadName           string  NtVolume.dat

 

LUA script controlling the EUPHORIA component

We have also identified that the JIMMY component is one of the modules that deal with  data leakage. Analysis revealed that the Flamer.A Trojan siphons any type of files, with a focus on documents, pictures and CAD files. Preliminary analysis also outlined that the MICROBE component is used to record audio and upload the captured audio streams to a remote location.

[fragment  of the configuration file for the MICROBE module]
MICROBE.DEFAULT_RATE                                dword   20000
MICROBE.SAMPLING_RATE                               dword   32000
MICROBE.MIN_ENERGY                                  dword   0
MICROBE.SEGMENT_LENGTH_SECS                         dword   600
MICROBE.RUN_MODE                                    dword   3

 

Last, but not least, the GATOR component seems to be responsible with communication between the infected host and the C&C servers. Other components (FROG, FLASK, GADGET, MUNCH and SNACK) are currently under the microscope. We will update the article as we analyse the other modules.

Update 1: We have just discovered that Trojan.Flamer.A comes with yet another controversial component, suggestively named SUICIDE. This component is used to automatically clean up the system when the appropriate command is issued by remote attackers. The SUICIDE module references more than 70 files (part of the Flamer framework) that should be wiped out from the system in order to deter any forensics analysis on the system. The referenced files are listed below:

 SUICIDE.RESIDUAL_FILES.A string %temp%\~a28.tmp
 SUICIDE.RESIDUAL_FILES.B string %temp%\~DFL542.tmp
 SUICIDE.RESIDUAL_FILES.C string %temp%\~DFL543.tmp
 SUICIDE.RESIDUAL_FILES.D string %temp%\~DFL544.tmp
 SUICIDE.RESIDUAL_FILES.E string %temp%\~DFL545.tmp
 SUICIDE.RESIDUAL_FILES.F string %temp%\~DFL546.tmp
 SUICIDE.RESIDUAL_FILES.G string %temp%\~dra51.tmp
 SUICIDE.RESIDUAL_FILES.H string %temp%\~dra52.tmp
 SUICIDE.RESIDUAL_FILES.I string %temp%\~fghz.tmp
 SUICIDE.RESIDUAL_FILES.J string %temp%\~rei524.tmp
 SUICIDE.RESIDUAL_FILES.K string %temp%\~rei525.tmp
 SUICIDE.RESIDUAL_FILES.L string %temp%\~TFL848.tmp
 SUICIDE.RESIDUAL_FILES.M string %temp%\~TFL849.tmp
 SUICIDE.RESIDUAL_FILES.N string %temp%\~ZFF042.tmp
 SUICIDE.RESIDUAL_FILES.O string %temp%\GRb9M2.bat
 SUICIDE.RESIDUAL_FILES.P string %temp%\indsvc32.ocx
 SUICIDE.RESIDUAL_FILES.Q string %temp%\scaud32.exe
 SUICIDE.RESIDUAL_FILES.R string %temp%\scsec32.exe
 SUICIDE.RESIDUAL_FILES.S string %temp%\sdclt32.exe
 SUICIDE.RESIDUAL_FILES.T string %temp%\sstab.dat
 SUICIDE.RESIDUAL_FILES.U string %temp%\sstab15.dat
 SUICIDE.RESIDUAL_FILES.V string %temp%\winrt32.dll
 SUICIDE.RESIDUAL_FILES.W string %temp%\winrt32.ocx
 SUICIDE.RESIDUAL_FILES.X string %temp%\wpab32.bat
 SUICIDE.RESIDUAL_FILES.Z string %windir%\system32\commgr32.dll
 SUICIDE.RESIDUAL_FILES.A1 string %windir%\system32\comspol32.dll
 SUICIDE.RESIDUAL_FILES.A2 string %windir%\system32\comspol32.ocx
 SUICIDE.RESIDUAL_FILES.A3 string %windir%\system32\indsvc32.dll
 SUICIDE.RESIDUAL_FILES.A4 string %windir%\system32\indsvc32.ocx
 SUICIDE.RESIDUAL_FILES.A5 string %windir%\system32\modevga.com
 SUICIDE.RESIDUAL_FILES.A6 string %windir%\system32\mssui.drv
 SUICIDE.RESIDUAL_FILES.A7 string %windir%\system32\scaud32.exe
 SUICIDE.RESIDUAL_FILES.A8 string %windir%\system32\sdclt32.exe
 SUICIDE.RESIDUAL_FILES.A9 string %windir%\system32\watchxb.sys
 SUICIDE.RESIDUAL_FILES.A10 string %windir%\system32\winconf32.ocx
 SUICIDE.RESIDUAL_FILES.A11 string %COMMONPROGRAMFILES%\Microsoft Shared\MSSecurityMgr\rccache.dat
 SUICIDE.RESIDUAL_FILES.A12 string %windir%\system32\mssvc32.ocx
 SUICIDE.RESIDUAL_FILES.A13 string %COMMONPROGRAMFILES%\Microsoft Shared\MSSecurityMgr\dstrlog.dat
 SUICIDE.RESIDUAL_FILES.A14 string %COMMONPROGRAMFILES%\Microsoft Shared\MSAudio\dstrlog.dat
 SUICIDE.RESIDUAL_FILES.A15 string %COMMONPROGRAMFILES%\Microsoft Shared\MSSecurityMgr\dstrlogh.dat
 SUICIDE.RESIDUAL_FILES.A16 string %COMMONPROGRAMFILES%\Microsoft Shared\MSAudio\dstrlogh.dat
 SUICIDE.RESIDUAL_FILES.A17 string %SYSTEMROOT%\Temp\~8C5FF6C.tmp
 SUICIDE.RESIDUAL_FILES.A18 string %windir%\system32\sstab0.dat
 SUICIDE.RESIDUAL_FILES.A19 string %windir%\system32\sstab1.dat
 SUICIDE.RESIDUAL_FILES.A20 string %windir%\system32\sstab2.dat
 SUICIDE.RESIDUAL_FILES.A21 string %windir%\system32\sstab3.dat
 SUICIDE.RESIDUAL_FILES.A22 string %windir%\system32\sstab4.dat
 SUICIDE.RESIDUAL_FILES.A23 string %windir%\system32\sstab5.dat
 SUICIDE.RESIDUAL_FILES.A24 string %windir%\system32\sstab6.dat
 SUICIDE.RESIDUAL_FILES.A25 string %windir%\system32\sstab7.dat
 SUICIDE.RESIDUAL_FILES.A26 string %windir%\system32\sstab8.dat
 SUICIDE.RESIDUAL_FILES.A27 string %windir%\system32\sstab9.dat
 SUICIDE.RESIDUAL_FILES.A28 string %windir%\system32\sstab10.dat
 SUICIDE.RESIDUAL_FILES.A29 string %windir%\system32\sstab.dat
 SUICIDE.RESIDUAL_FILES.B1 string %temp%\~HLV751.tmp
 SUICIDE.RESIDUAL_FILES.B2 string %temp%\~KWI988.tmp
 SUICIDE.RESIDUAL_FILES.B3 string %temp%\~KWI989.tmp
 SUICIDE.RESIDUAL_FILES.B4 string %temp%\~HLV084.tmp
 SUICIDE.RESIDUAL_FILES.B5 string %temp%\~HLV294.tmp
 SUICIDE.RESIDUAL_FILES.B6 string %temp%\~HLV927.tmp
 SUICIDE.RESIDUAL_FILES.B7 string %temp%\~HLV473.tmp
 SUICIDE.RESIDUAL_FILES.B8 string %windir%\system32\nteps32.ocx
 SUICIDE.RESIDUAL_FILES.B9 string %windir%\system32\advnetcfg.ocx
 SUICIDE.RESIDUAL_FILES.B10 string %windir%\system32\ccalc32.sys
 SUICIDE.RESIDUAL_FILES.B11 string %windir%\system32\boot32drv.sys
 SUICIDE.RESIDUAL_FILES.B12 string %windir%\system32\soapr32.ocx
 SUICIDE.RESIDUAL_FILES.B13 string %temp%\~rf288.tmp
 SUICIDE.RESIDUAL_FILES.B14 string %temp%\~dra53.tmp
 SUICIDE.RESIDUAL_FILES.B15 string %systemroot%\system32\msglu32.ocx

 

The discovery of Stuxnet back in 2010 sparked intense debate on the state of security in cyber-space. But, even though Stuxnet has been successfully identified, isolated and dealt with, its predecessor (and companion, as well) has managed to remain undetected all this time by employing stunning tactics that likely make it the most advanced e-threat in the world to date.

When state-of-the-art malware detection works against intelligence gathering

This new e-threat, identified by Bitdefender as Trojan.Flamer.A appears to have emerged before Stuxnet and Duqu hit. All this time, it has operated discreetly, and even if it some of its components were detected when Stuxnet was discovered, the AV industry couldn’t see how deep the operation ran.

On average, between 15,000 and 35,000 unique malware samples appear daily, which makes manual analysis or individual identification technically unfeasible. Most antivirus vendors rely on generic detections and heuristics to cover as much as possible of this malicious pool. Subsequently, the features Flamer.A shared with Stuxnet made antivirus products detect it as a generic Stuxnet sample. This, along with some other technical features allowed it stay hidden, although its operation was impacted.

At a glance, the Flamer.A Trojan appears much more advanced than Stuxnet. This complex and flexible piece of malware was built using a variety of technologies ranging from LUA scripting to assembly language. Its modular structure makes it extremely flexible and apparently able to carry out any task for its attackers.

The Flamer Trojan includes a spying component, called nteps32.ocx. This component, named REAR_WINDOW has an earlier version called comspol32.ocx that has definitely been around since the end of 2010 and is well detected by antivirus vendors with miscellaneous signatures.

Bitdefender also managed to isolate a new component called atmpsvcn.ocx that dates approximately in October 2010 and that is also detected as Stuxnet. Its purpose is unknown yet, as it is pending analysis, but preliminary data point to it being used for USB drive spreading and detection of AV solutions installed on the PC.

We mentioned that Flamer.A makes heavy use of LUA scripts. Bitdefender identified 62 such scripts used by the malware to control everything, from loading the OCX modules to regulating data exchange between these components. Among others, these highly specialized LUA modules can circumvent some antivirus solutions, control the theft of information from the infected PC or download new malicious components as they get updated. Combined, these LUA scripts are built of more than 6500 lines of code.

Fig. 1: Core LUA scripts copied on the USB drive

SSL encryption working against the user

If encrypting data as it gets sent over the web is usually beneficial for the user, Flamer.A uses it against them. The infected PCs connect to an array of servers to which they send encrypted data over HTTPS.  The data packages we intercepted and decrypted were buffers of about 100 kilobytes that apparently carry files with various sizes. The one we intercepted was 108.116 bytes and was encrypted with the “LifeStyle2” password, but using a currently unknown algorithm. This might be either a file leaked from the infected PC or an activity log file sent to the C&C. It also appears that the file was sent by the leak_app.lua script.

Fig. 2: Decrypted traffic sent over HTTPS

The other C&C servers we tested during the preliminary analysis (quick-net.info, smart-access.net, traffic-spot.biz and traffic-spot.com) now respond with “404: Not Found”, which probably means that the group behind their operation is shutting down the business or switching to newer servers.

Designed to leak files  via USB in isolated systems

Although the Flamer.A Trojan is not concealed by a rootkit, it uses a series of tricks to stay hidden and stealthily export stolen data. One of the its most amazing stunts is the creation of a file on the USB stick simply named “.” (dot).

Fig. 3: FAT root directory listing

Even if the short name for this file is HUB001.DAT, the long name is set to “.”, which is interpreted by Windows as the current directory. This makes the OS unable to read the contents of the file or even display it.

A closer look inside the file reveals that it is encrypted with a substitution algorithm. Once decrypted, the contents reveal a SQL schema containing the activity of the malware on the infected system, such as Core LUA components with attributes such as ‘SPREADABLE’, a log of leaked files, as well as an event log detailing the activity of every single LUA module.

Fig. 4: SQL Schema dumped on the USB drive

This logging activity, apparently controlled by the Euphoria LUA module, is likely related to data theft from systems that are not connected to the Internet in any way. Since most sensitive targets operate in isolated environments where data can’t be leaked out via a connection to the Internet, the malware dumps this SQL schema on the USB drive, and will probably send it to the attackers when the disk is plugged into a computer with access to the internet.

202 Responses to 3rd UPDATE: Cyber Espionage Reaches New Levels with Flamer


  1. Keshav Raj Aryal says:

    I have just downloaded and saved the file for future use,therefore I am not in a position to comment at present.

  2. Rod Branham says:

    I downloaded the 32 bit version adn keep getting an error message about it could not drop the drivers and to contact you guys. What is wrong?

  3. Godwin says:

    Now you are leading and saving the world,bitdefender.

  4. Mandy Moore says:

    I downloaded the 32 bit version adn keep getting an error message about it could not drop the drivers and to contact you guys.

  5. Twolane says:

    Ditto on comment #2.

  6. H1tchclock says:

    Ustedes son mas rapidos que Kaspersky. Saludos desde Bolivia:http://foro.elhacker.net/foro_libre/nuevo_supermalware_flame-t363035.0.html

  7. bbotezatu says:

    @Rod Branham, @Mandy Moore: please make sure that you are using the appropriate variant of tool for your operating system (i.e. use the 32-bit version of the tool for 32-bit Windows and 64-bit tool for 64-bit Windows). Also, please make sure that you are running the tool with administrative privileges, as the installation of these drivers require elevation.

    Kind regards,
    Bogdan “BOB” Botezatu.

  8. katie says:

    As a budding security researcher, where can I get a sample like this one to analyze?

  9. Mandy Moore says:

    No luck after following your instructions Mr Bogdan “BOB” Botezatu Thanks.

    • bbotezatu says:

      Sorry to hear that, Mandy. Are you running the tool as an administrator? Right-click the tool and select the “Run as administrator” option. It should work.

  10. Mandy Moore says:

    Did that no go yet

  11. alex says:

    I have the same problem as Rod and Mandy. Yes, I am using the 64 bit version on my 64 bit Win 7 system and yes, I started the removal tool with administration rights.
    First time when I started the tool, everything looked fine, but I had to abort the process because I needed to shut down my laptop.
    Next time when I tried to start it, it just froze – not even the task manager could be started after that.. so I had to press the power-button of my laptop.
    And now I get the same error message as Rod and Mandy.

  12. mirza ioan says:

    este un lucru exceptional.

  13. alex boicu says:

    dupa ce am downloadat aplicatia si am dat run, bitdefender internet security 2012 pe care il am pe calculator a dat mesajul:”Intrusion detection has detected and blocked a potentially malicious application”. Cred ca nu prea e in regula, nu-i asa?

  14. keeyo says:

    same error hier second time trying to run (with admin rights)”could not drop the drivers.This means there is an error in the build”

  15. Twolane says:

    Still no luck with the updated 64bit version running as administrator. “Cannot drop drivers – error in the build”. Thanks for trying though.

  16. lmiguel says:

    wow a really good work of analysis… keep up the good work

  17. WS says:

    Disable antivirus and firewall and run the tool with administrative privileges

  18. Solly Atwell says:

    Works OK, win7 64-bit service pack 1. Runs for “ages” at start & just says “preparing” with a spinning circle then scans really quickly. I was clean. Thank you

  19. AnonymousSoldat says:

    Que lo pario ..

  20. Ian West says:

    Get an “initiation error” when running x64 version with admin rights on Win7 SP1.

  21. oded says:

    i’m suffering from the same problem as described above

  22. bub says:

    Another removal tool:

    http://www.certcc.ir/index.php?name=news&file=article&sid=1901

    it was linked to at Cryptome.org, I have not tested it.

  23. alex says:

    After 2 computer restarts the tool is functioning again! Problem solved :)
    Thanks for the tool!

  24. Schmitt says:

    Do you have a free solution for Linux-Systems
    against flame too ?

  25. RODRIGO CESAR BANHARA says:

    Oh my God. BitDefender rules!!!

  26. Doc says:

    No problems encountered running the x64 tool. No Flame yet either (but didn’t expect it). Thanks BitDefender, glad I have your software! Keep up the good work.

  27. Schmitt says:

    I have overseen that flame is written in Lua as script.
    Means there is upcoming the term “INSTALLFLAME” in this script.
    would then in Linux-bash-console help this ? :
    sudo grep -r “*flame*” *
    or
    sudo grep -r “*FLAME*” *

  28. Usunoro says:

    Is this included as well in the latest BitDefender Internet Security 2012 updates as well?

    • bbotezatu says:

      Hey there Usunoro. Yes, we have also added detection and removal for Flamer in all antivirus products. This also reads in the beginning of the article :)

  29. Manuel Campos says:

    Thanks

  30. Marietta Scondo says:

    Please let me know if my PC is infected with FLAME.

  31. okvir says:

    works fine, nothing found, win7 64 bit

  32. eric says:

    please post sha1 or better checksums for the downloads, thanks.

  33. fsck says:

    is it too much to ask to post some SHA1 or better CHECKSUMS for the DOWNLOADS!?

    HEELLLOOOOOOOOOOOOoooooooooooooooooooooO!

  34. Dennis says:

    The app is running…in French. How can I switch it to English as I was expecting it to (especially when clicking using presumably English links)?
    Thanks for the work, though. Please get back to me.

  35. Romario says:

    good

  36. Rod says:

    Initialization error on Vista SP2, run as Admin too…

  37. Grr says:

    Solly Atwell said: “Runs for “ages” at start & just says “preparing” with a spinning circle then scans really quickly.”

    Wondering how long “ages” is, because the prog was in ‘preparing’ mode for well over half an hour before I gave up…

  38. cosmo says:

    why aren’t you approving messages suggesting you post SHA1 or better checksums for your downloads so we KNOW we downloaded your files CORRECTLY? HELLO? IS THIS THING ON?

  39. Barış Ünver says:

    Hey. I always get the “Initialization Error” so I can’t start the tool. I’m using Windows 7 Ultimate x64 with Turkish translation. What should I do?

  40. Enddo says:

    So, it’s only a windows virus! Hope so, Linux & Unix are getting choices.
    Good Luck Winny.

  41. mani says:

    Hi,
    As a budding security researcher, where can I get a sample like this one to analyze?

  42. Rolf says:

    Is it possible for this malware to infect a mac?

  43. omran says:

    thanks for your help

  44. sacha says:

    nose mucho de esto alguien me puede ayudar gracias

  45. TAHIRI says:

    supprimer Trojan.Flame A

  46. Gonzalo Jara says:

    download and does not work, please help me.

  47. Emil-Anton COMȘA says:

    Noi folosim cu succes aplicatia bitdefender pe portalul nostru http://www.antrecalba.ro

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