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Revue de presse francophone :
- Appaloosa AppDome nouent un partenariat pour accompagner les entreprises dans le déploiement et la protection des applications mobiles
- D-Link offre une avec un routeur VPN sans fil AC
- 19 mai Paris Petit-Déjeuner Coreye Développer son business à l'abri des cyberattaques
- POYNTING PRESENTE LA NOUVELLE ANTENNE OMNI-291, SPECIALE MILIEU MARITIME, CÔTIER ET MILIEU HUMIDE
- Flexera Software Les utilisateurs français de PC progressent dans l'application de correctifs logiciels, mais des défis de tailles subsistent
- Riverbed lance SD-WAN basé sur le cloud
- Fujitsu multi-récompensé VMware lui décerne plusieurs Partner Innovation Awards à l'occasion du Partner Leadership Summit
- Zscaler Private Access sécuriser l'accès à distance en supprimant les risques inhérents aux réseaux privés virtuels
- QNAP annonce la sortie de QTS 4.2.1
- Une enquête réalisée par la société de cyber sécurité F-Secure a décelé des milliers de vulnérabilités graves, potentiellement utilisables par des cyber criminels pour infiltrer l'infrastru
- Trouver le juste équilibre entre une infrastructure dédiée et cloud le dilemme de la distribution numérique
- 3 juin - Fleurance - Cybersécurité Territoires
- Cyber-assurances Seules 40 pourcents des entreprises françaises sont couvertes contre les violations de sécurité et les pertes de données
- Des étudiants de l'ESIEA inventent CheckMyHTTPS un logiciel qui vérifie que vos connexions WEB sécurisées ne sont pas interceptées
- Les produits OmniSwitch d'Alcatel-Lucent Enterprise ALE gagnent en sécurité pour lutter contre les cyber-attaques modernes

Dernier articles de SecuObs :
- DIP, solution de partage d'informations automatisée
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- Renaud Bidou (Deny All): "L'innovation dans le domaine des WAFs s'oriente vers plus de bon sens et d'intelligence, plus de flexibilité et plus d'ergonomie"
- Mises à jour en perspective pour le système Vigik
- Les russes ont-ils pwn le système AEGIS ?
- Le ministère de l'intérieur censure une conférence au Canada
- Saut d'air gap, audit de firmware et (in)sécurité mobile au programme de Cansecwest 2014
- GCHQ: Le JTRIG torpille Anonymous qui torpille le JTRIG (ou pas)
- #FIC2014: Entrée en territoire inconnu
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Revue de presse internationale :
- VEHICLE CYBERSECURITY DOT and Industry Have Efforts Under Way, but DOT Needs to Define Its Role in Responding to a Real-world Attack
- Demand letter served on poll body over disastrous Comeleak breach
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- Hacking group PLATINUM used Windows own patching system against it
- Hacker With Victims in 100 Nations Gets 7 Years in Prison
- HPR2018 How to make Komboucha Tea
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- FBI Director Suggests iPhone Hacking Method May Remain Secret
- 2016 Hack Miami Conference May 13-15, 2016
- 8-bit Video Wall Made From 160 Gaming Keyboards
- In An Era Of Decline, News Sites Can t Afford Poor Web Performance
- BeautifulPeople.com experiences data breach 1m affected
- Swedish Air Space Infringed, Aircraft Not Required
- Why cybercriminals attack healthcare more than any other industry
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Annuaire des videos
- FUZZING ON LINE PART THREE
- Official Maltego tutorial 5 Writing your own transforms
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- install zeus botnet
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- RSA Todd Schomburg talks about Roundup Ready lines available in 2013
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Revue Twitter
- RT @fpalumbo: Cisco consistently leading the way ? buys vCider to boost its distributed cloud vision #CiscoONE
- @mckeay Looks odd... not much to go on (prob some slideshow/vid app under Linux)
- [SuggestedReading] Using the HTML5 Fullscreen API for Phishing Attacks
- RT @BrianHonan: Our problems are not technical but cultural. OWASP top 10 has not changed over the years @joshcorman #RSAC
- RT @mikko: Wow. Apple kernels actually have a function called PE_i_can_has_debugger:
- [Blog Spam] Metasploit and PowerShell payloads
- PinkiePie Strikes Again, Compromises Google Chrome in Pwnium Contest at Hack in the Box: For the second time thi...
- @mikko @fslabs y'all wldn't happen to have lat/long data sets for other botnets, wld you? Doing some research (free/open info rls when done)
- RT @nickhacks: Want to crash a remote host running Snow Leopard? Just use: nmap -P0 -6 --script=targets-ipv6-multicast-mld #wishiwaskidding
- An inexpensive proxy service called is actually a front for #malware distribution -

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Top bi-hebdo de la revue Twitter
- RT @secureideas: I believe that all the XSS flaws announced are fixed in CVS. Will test again tomorrow if so, release 1.4.3. #BASESnort
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Internet Explorer Zero-Day Used in Watering Hole Attack Q A

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Internet Explorer Zero-Day Used in Watering Hole Attack Q A

Par Symantec Connect Security Response Billets
Le [2013-01-01] à 05:03:49



Présentation : In a recent blog, Symantec reported on a new Internet Explorer zero-day being actively exploited in the wild. Microsoft has since released Security Advisory 2794220 which confirms the Microsoft Internet Explorer 'CDwnBindInfo' Use-After-Free Remote Code Execution Vulnerability CVE-2012-4792 is a zero-day vulnerability which affects Internet Explorer 8, Internet Explorer 7, and Internet Explorer 6. The following Q A briefly outlines what is known about the watering hole attack, the Internet Explorer zero-day, and the protection Symantec has in place. What is a watering hole attack A watering hole attack is a method of targeting sites which are likely to be visited by targets of interest. The attacker will compromise the site and inject JavaScript or HTML to redirect victims to additional malicious code. The compromised site is then left waiting to exploit users who visit through drive-by downloads. Figure 1. Watering hole attacks Symantec has published research surrounding watering hole attacks The Elderwood Project which details targets, growing trends, and attack platforms seen since 2009. How did this watering hole attack work This new Internet Explorer zero-day compromised the website of a U.S.-based think-tank organization so that, when a victim visited, JavaScript was executed which performed numerous checks and then exploited the browser. First, the attack checked that the browser accessing the page was Internet Explorer 8. Next, it checked if Flash was installed, and finally it checked the system language specifically looking for Chinese, Taiwan Chinese, United States English, Russian, Japanese, or Korean . If any of the checks failed, the victim was redirected to a blank page. If all of the above checks passed, the attack then proceeded to load a cookie to indicate a compromised system. If the victim visited this page again within seven days of being compromised, they were redirected to a blank page. Next, an additional check was performed on the installed version of Java. Specifically, the attack looked for Java version 6 and, if found, a Flash object was loaded using a CLSID. This loaded malicious Shockwave Flash File today.swf was responsible for the heap-spray. An iFrame was also created which linked to a news.html page and contained the exploit code for Internet Explorer 8. This exploit code targeted users running Windows XP and Windows 7. The Flash object contained ActionScript code which was used to build shellcode based on the operating system version and language packs installed. The ActionScript built specific shellcodes depending on the version of Windows encountered. For Windows 7 it used Return-Oriented Programming or ROP-chains to build shellcode. Figure 2. Steps in watering hole attack While the browser is being exploited through the news.html iFrame, a GET request was made from the original compromised page to download a xsainfo.jpg file that was stored in Internet Explorer's Temporary Internet Files. This is an encoded dynamic-link library DLL binary which was the payload of the attack. When the Flash object was loaded, it performed a heap-spray and injected the shellcode used to locate the xsainfo.jpg file, decode it, and store it in the pourcentsTemppourcents flowertep.jpg file. Next, a request was sent for the robots.txt file which gets de-obfuscated and then used to load the malicious payload flowertep.jpg using techniques to by-pass DEP and ASLR on Windows 7. The method employed to deliver the payload is unusual as it initially downloads the payload before exploitation occurs. This is a technique known as a drive-by-cache attack where the malware is downloaded first and the shellcode is used to load the malicious payload instead of downloading it. What is the zero-day vulnerability According to Microsoft, the vulnerability exists in the way that Internet Explorer accesses an object in memory that has been deleted or has not been properly allocated, allowing for memory corruption which could allow an attacker to execute arbitrary code. This is known as a use-after-free vulnerability. At this time Symantec cannot disclose further information in relation to the vulnerability in question. Microsoft is working around the clock to have a full security update available. What is the final payload As previously mentioned, the xsainfo.jpg file contains the final encrypted payload and the flowertep.jpg file contains a decrypted malicious DLL. Figure 3. Final payload When the flowertep.jpg file gets executed it will first drop the final malicious payload temporarily to the pourcentsTemppourcents shiape.exe file. From there it will move the file to its final location as the pourcentsCommonProgramFilespourcents DirectDB.exe file. Additionally, it will append random junk data to the end of the file so that the file has different hash value every time, but the first 0xe000 bytes are always the same. Looking at both files we can notice that the dropper flowertep.jpg file has a portable executable timestamp which indicates the file was compiled on Wed Dec 12 11 06 04 2012 . The final payload DirectDB.exe file is much older and originates from Thu Mar 01 00 29 20 2012 . Both files the dropper flowertep.jpg file and the DirectDB.exe file are detected as Backdoor.Bifrose.N. Backdoor.Bifrose is a threat family initially seen in 2004 and has seen many evolutions over the years. This latest variant of Backdoor.Bifrose.N is similar to Backdoor.Bifrose.M but, unlike the previous variant, does not use TOR for the network communication as described in a previous Symantec blog. The threat implements common back door functionality such as uploading, downloading, and executing files. How prevalent is this attack Initial Symantec telemetry relating to this zero-day attack suggests that the number of computers affected is presently limited. The victims of this attack seem to predominantly be in North America. Due to the location and nature of the website that was compromised to host the zero-day, this keeps in line with the idea of the zero-day being used as a targeted watering-hole attack. Figure 4. Heatmap of Symantec detections related to this zero-day watering hole attack What can I do to prevent and mitigate against this attack Microsoft has released a Technet blog for this vulnerability outlining ways to block code execution. At the top of their list is upgrading to Internet Explorer to 9 or 10 which does not include the vulnerable code. Symantec protects customers against this attack with the following detections Antivirus Bloodhound.Exploit.486 Bloodhound.Flash.17 Backdoor.Bifrose.N Intrusion Prevention Signatures 26190 - Web Attack Malicious SWF Download 5 26317 - Web Attack MSIE Use After Free CVE-2012-4792 26318 - Web Attack MSIE Use After Free CVE-2012-4792 2 Conclusion The use of zero-day exploits in targeted attacks is certainly not a new phenomenon. Many high profile incidents like Hydraq also known as Aurora , Stuxnet, and Duqu used one or more zero-day exploits to accomplish their goal. As detailed in the Symantec Elderwood Project paper we have seen zero-day usage increasing in such attacks. However, most attackers still use common, publicly available, exploits to carry out their attack. In this particular case, use of a zero-day exploit suggests a high level of sophistication requiring access to resources and skills which would normally be outside most hackers capabilities.

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