Tag Archives: Gong Da

Gong Da Exploit Kit Add Java CVE-2013-1493 & IE CVE-2012-4792 & IE CVE-2012-4969 Support

Various, , , , , , , , , , , , , , , , ,

Like other Exploit Kits, Gong Da has add support for Oracle Java CVE-2013-1493 vulnerability, fixed in Oracle Java 6 Update 17, has also add support for Microsoft Internet Explorer CVE-2012-4969 and CVE-2012-4792 vulnerabilities, fixed in an emergency patch in September 2012 and January 2013.

Here is the new code for CVE-2013-1493.

Capture d’écran 2013-04-14 à 23.39.38

And here the new code for CVE-2012-4792 (aka 4792.html) and CVE-2012-4969 (aka payload.html).

Capture d’écran 2013-04-14 à 23.39.48

Also a new variant of CVE-2012-1889 (xml.html) has been introduced, reducing the detection rate by anti-viruses.

Capture d’écran 2013-04-14 à 23.40.15

As always this new version of Gong Da Exploit Kit has been discovered on a Korean web site.

Gong Da Pack has involve to the following diagram.

Gong Da EK 1.5

Here under some information s regarding the different files:

Normally Gong Da was used against gamers, but this time the loaded malware seem to be different (analysis on ThreatExpert)

Gong Da / Gondad Exploit Pack Add Flash CVE-2013-0634 Support

Various, , , , , , , , , , , , , , , , ,

If you are working in computer security and still don’t have heard about the latest Adobe Flash 0days, aka CVE-2013-0633 and CVE-2013-0634, then you should change of job ! These vulnerabilities were found exploited in targeted attacks through spear phishing email messages targeting several industries including the aerospace one.

One of the e-email attached Word document was using the 2013 IEEE Aerospace Conference schedule, and another reported sample was related to online payroll system of ADP US company, to exploit CVE-2013-0633. I wrote a complete blog post regarding this campaign 2 weeks ago.

Adobe fixed the vulnerabilities in APSB13-04 the 7 February, but the vulnerabilities were not found massively exploited in Exploit Kits. Also there was a confusion,  by anti-virus vendors and security researchers, regarding CVE-2013-0633 and CVE-2013-0634 detection. But as mentioned in Adobe APSB13-04 CVE-2013-0633 was only exploited by been embedded in Word documents and CVE-2013-0634 was exploited through HTML web pages and by been embedded in Word documents.

So as nobody as seen CVE-2013-0633 working outside a Word document, I will suppose that the vulnerability I discovered exploited in Gong Da exploit kit is potentially a fork of CVE-2013-0633 or could be CVE-2013-0634. Colleagues, you are welcome for comments 🙂

Here is the new code in Gong Da exploit kit.

Capture d’écran 2013-02-25 à 23.29.30

If you take a look at the ActionScript of “myrF03.swf” (506fe8f82ea151959c5160bc40da25b5) you will see some similarities with CVE-2013-0633, like the “ByteArrayAsset” mentioned by MalwareMustDie, or the well-known “LadyBoyle” function.

Capture d’écran 2013-02-26 à 00.10.49

Capture d’écran 2013-02-26 à 00.11.03

This new version was discovered on “hxxp://www.jhtyhtrsgr.com/yymex/index.html” a web site how is actually still online.

Capture d’écran 2013-02-25 à 23.29.04

“jhtyhtrsgr.com” is hosted on 69.197.61.29, in US and this domain name was created the 22 Feb 2013 with registration informations located in China and the following contact “jing yan ([email protected]) – GuangMing yanjing“.

The “index.html” file containing JavaScript code obfuscated by “JSXX VIP JS Obfuscator“, but traditional traces if this obfuscator are no more available.

After de-obfuscation of the “index.html” file you can see that Gong Da Pack has involve to the following diagram.

Gong Da EK 1.4 - 2

Here under some information s regarding the different files:

  • vQSopE2.jpg (aka CVE-2011-3544) : 10/46 on VirusTotal.com
  • ulxzBc7.jpg (aka CVE-2012-0507) : 11/45 on VirusTotal.com
  • MQnA3.jpg (aka CVE-2012-1723) : 18/46 on VirusTotal.com
  • eATBNfg1.jpg (aka CVE-2012-4681) : 29/46 on VirusTotal.com
  • tkPfaMz7.jpg (aka CVE-2012-5076) : 14/46 on VirusTotal.com
  • iOiezo6.jpg (aka CVE-2013-0422): 19/46 on VirusTotal.com
  • YPVTz8.html (aka CVE-2012-1889): 14/46 on VirusTotal.com
  • vQSopE2.html (aka CVE-2012-1889): 12/46 on VirusTotal.com
  • myrFO3.swf (aka a fork of CVE-2013-0633 CVE-2013-0634): 8/46 on VirusTotal.com

Here under a demonstration video of CVE-2013-0633 CVE-2013-0634 without been embeded in a Word document.

Updates:

After investigation from @unixfreaxjp, it seem that the exploited vulnerability is CVE-2013-0634 and not CVE-2013-0633.

Gong Da / Gondad Exploit Pack Add Java CVE-2013-0422 support

Reverse Engineering, , , , , , , , , , , , , , , , ,

If you are working in computer security and still don’t have hear about the latest Oracle Java 0day, aka CVE-2013-0422, then you should change you job ! This last Oracle Java 0day was discovered massively exploited in exploit kits by @kafeine the 10th January. Other exploit kits have quickly add support of this new vulnerability, like Gong Da exploit kit.

Gond-Da-CVE-2013-0422-2

This new version was discovered on “hxxp://syspio.com/data/m.html” a web site how is actually still online.

gond-da-exploit-kit-CVE-2013-0422-1

“syspio.com” is hosted on 222.239.252.166, in KR and this domain name seem to be associated with a legit compromised web site.

The “m.html” file containing JavaScript code obfuscated by “JSXX VIP JS Obfuscator“, but traditional traces if this obfuscator are no more available.

After de-obfuscation of the “m.html” file you can see that Gong Da Pack has involve to the following diagram.

Gong Da EK - 1.3

Here under some information s regarding the different files:

  • EnKi2.jpg (aka CVE-2011-3544) : 8/46 on VirusTotal.com
  • cLxmGk3.jpg (aka CVE-2012-0507) : 11/46 on VirusTotal.com
  • OLluRM4.jpg (aka CVE-2012-1723) : 20/46 on VirusTotal.com
  • GPUrKz2.jpg (aka CVE-2012-4681) : 29/45 on VirusTotal.com
  • PBLO5.jpg (aka CVE-2012-5076) : 12/46 on VirusTotal.com
  • Nuwm7.jpg (aka CVE-2013-0422): 6/46 on VirusTotal.com

Gong Da / Gondad Exploit Pack Add Adobe Flash CVE-2012-1535 Support

Reverse Engineering, , , , ,

Gong Da exploit kit is involving, after integration of the CVE-2012-5076 Java vulnerability (Java Applet JAX-WS) one week ago, the EK is now preparing integration for Adobe Flash vulnerability CVE-2012-1535 fixed in APSB12-18 patch.

This new version was discovered on “hxxp://coa.ains.co.kr/css/css.html” and on “hxxp://www.dcpccdrw.com/asdf/index.html” web sites who is actually still online.

“coa.ains.co.kr” seem to be a legit web site and is hosted on 221.143.50.201, AS9318, in South Korea. “dcpccdrw.com” is hosted on 174.37.172.69, AS36351, in US. “dcpccdrw.com” domain name was created the 2012-11-23, through name.com registrar, for “tao wen ([email protected])“.

“index.html” and “css.html” file containing JavaScript code are obfuscated by “JSXX VIP JS Obfuscator“.

After de-obfuscation of the HTML files you can see that Gong Da Pack has involve to the following diagram.