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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

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- Mises à jour en perspective pour le système Vigik
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Revue de presse internationale :
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Annuaire des videos
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Revue Twitter
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- RT @BrianHonan: Our problems are not technical but cultural. OWASP top 10 has not changed over the years @joshcorman #RSAC
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- @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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Cybercriminals Behind CVE-2013-3893 Launched Attacks Earlier Than Previously Reported More Widespread

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Cybercriminals Behind CVE-2013-3893 Launched Attacks Earlier Than Previously Reported More Widespread

Par Security Labs
Le [2015-05-30] à 18:33:51



Présentation : Websense Security Labs Websense ThreatSeeker Intelligence Cloud has discovered that attacks utilizing the most recent Internet Explorer zero-day CVE-2013-3893 are more prevalent than previously thought. In this write up we shall analyze the exploit code and perform analysis on the dropped malicious file. Executive Summary We have seen the CVE-2013-3893 exploit targeting Japanese firms in the financial industry hosted on a Taiwanese IP address. Our ThreatSeeker Intelligence Cloud reported a potential victim organization in Taiwan attempting to communicate with the associated malicious command and control server as far back as July 1, 2013. These C C communications predate the widely-reported first use of this attack infrastructure by more than six weeks, and indicates that the attacks from this threat actor are not just limited to Japan. Commonalities in C C infrastructure, domain registrations, exploit techniques and malware link this threat actor to the Operation DeputyDog and Hidden Lynx attack crew. This alleged hackers-for-hire crew has committed ongoing attacks against businesses, stealing vital information, allegedly dating back to 2009. Our telemetry indicates that these attacks have enough variations to indicate that different high-profile attack teams may be using the same tool sets. Websense has protected our customers from the CVE-2013-3893 exploit observed in the wild using real-time analytics that have been in place for nearly three years. A Reminder... In our previous post Up to 70pourcents of PCs Vulnerable to Zero-Day CVE-2013-3893 we covered a remote code execution vulnerability CVE-2013-3893 that exists across all versions of Internet Explorer. This vulnerability exploits the way that Internet Explorer accesses an object in memory that has been deleted or not properly allocated, allowing an attacker to execute arbitrary code affecting current users with Internet Explorer. An exploit leveraging this vulnerability was first discovered in very targeted attacks located in Japan. First disclosed in a Wepawet security advisory on August 29th, 2013, Microsoft released a security advisory KB2887505 providing details on the vulnerability and a Fix-It solution on September 17th, 2013. Websense researchers reviewed our third-party telemetry feeds to determine the potential attack surface and risk associated with this exploit, and determined that nearly 70pourcents of Windows-based PCs are vulnerable. While the vulnerability can theoretically affect all versions of Internet Explorer, the exploit is targeting only users of IE8 and IE9 who are running the Windows 7 and XP operating systems. The Exploit On September 25th, 2013, at 00 39 PST, Websense real-time security analytics stopped an exploit against one of our customers a major financial institution based in Japan leveraging CVE-2013-3893 being hosted on a Taiwanese IP address 220.229.238.123 . The exploit was hosted at the following URL hxxp 220.229.238.123 tn images index.html . It is worth noting that in addition to specific analytics designed to stop this exploit, three different Websense real-time analytics protected our customers from this threat dating back for more than 3 years. Below is a screenshot of the Exploit code for CVE-2013-3893 that is hosted on the Taiwanese IP 220.229.238.123 . It is interesting that the JavaScript exploit is not obfuscated and is delivered in clear-text, while the shell code and dropper discussed below are both obfuscated. Screen shot of the exploit's obfuscated shell-code We were quickly able to recover the XOR key 9F and de-obfuscate the shellcode with a clear-text attack to reveal the dropper file. While the delivery mechanisms are very similar, it is interesting to note that the URI path, IP address and image file names are different than those noted in the analysis of the Operation DeputyDog attacks, as this shell code attempts to drop . tn logo.jpg from the IP address 220.229.238.123 . Analysis of the JPG file, when XORed with 0x95 reveals an executable titled runrun.exe 38db830da02df9cf1e467be0d5d9216b A clear-text attack on the logo.jpg file revealed that it is actually a Windows executable when XORed with 0x95 with the following attributes time obfuscation xray.pl logo.jpg Opening file logo.jpg 94BC 95 runrun.exe 782C 95 user32.dll 79D6 95 KERNEL32.dll 7A14 95 ADVAPI32.dll E0 95 PE 4D 95 This program cannot be run in DOS mode. 776C 95 Microsoft Visual C Runtime Library 7C76 95 GetProcAddress Network Analysis The runrun.exe immediately performs a DNS lookup for login.momoshop.org Next, runrun.exe initiates an HTTPS connection handshake to login.momoshop.org 210.17.236.29 , which is terminated by the server. For some reason, the client never sends a SYN ACK to continue the HTTPS handshake. More on this when we finish reversing the malware. Interestingly, momoshop.org was registered on March 16, 2013, by the registrant listed above. This domain is unusually old 6 months in the context of the other C C domains that we have seen associated with the malware and that were registered just days before the attacks. Telemetry Data Websense Labs researchers are currently confirming telemetry from the ThreatSeeker network with possibly compromised Taiwanese hosts communicating to the C C server 180.150.228.102 associated with malware variants 8aba4b5184072f2a50cbc5ecfe326701 and bd07926c72739bb7121cec8a2863ad87 dating back to July 1st, 2013, indicating that attacks from the threat actor identified in the Operation DeputyDog report may have started earlier than previously thought and may not be limited only to Japan. More on this soon. Conclusion 1. We have seen the CVE-2013-3893 exploit targeting Japanese firms in the financial industry, being hosted on a Taiwanese IP address hxxp 220.229.238.123 tn images index.html as of September 25th at 00 39 PST. 2. Websense has three real-time analytics one has been in place for nearly three years that blocked the CVE-2013-3893 exploit from compromising customers. 3. ThreatSeeker Intelligence Cloud reports a potential victim organization in Taiwan attempting to communicate with the malicious C C server 180.150.228.102 associated with the CVE-2013-3893 exploit as early as July 1st, 2013. 4. The C C server above can be associated with the Bit9 compromise. The contact email address 654 123.com was used to register the domain blankchair dot com which points to the malicious C C server 180.150.228.102 . The same email address was used to register a C C server downloadmp3server dot servemp3 dot com 66.153.86.14 associated with the Bit9 attacks. 5. Websense Threat Intelligence indicates that the threat actor's attacks were not limited only to Japan as previously reported. The use of separate IP addresses, domain registrations, and permutations to dropper locations indicates a high degree of segmentation between attacks and different teams using the same tool sets, exploits and C C infrastructure. The real-time analytics deployed in ACE our Advanced Classification Engine were able to detect and stop the attack above at three stages independent of the zero-day exploit CVE-2013-3893 for which we had built specific protection. These analytics were able to detect the techniques used to deliver and obfuscate the exploit and malware, protecting our customer from being compromised. This is a great example of how offering protection from multiple stages of an attack can stop even highly targeted, low volume threats with cutting edge exploits.




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