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  • 1. 20141116

    Malware-Traffic-Analysis.net - 2014-11-16 - Traffic analysis exercise

    CyberDefenders – MyDFIR

    并不是解题的思路历程,而是答案证据记录。

    LEVEL 1 QUESTIONS:

    What is the IP address of the Windows VM that gets infected?

    根据经验捕捉的流量有公私网地址,所以应该位于网关位置,所以受感染的 vm 应该为私网地址,那么很有可能就是以下地址。

    image-20211228103124207

    根据通信数据大小来判断,很有可能是 172.16.165.165 这台。

    此外,这些 ip 有的是主机,有的是 路由器/交换机,可以通过 nbns 协议进一步确认。nbns 协议特征是主机向 路由器/交换机 发送消息。

    image-20211228105151205

    因此,可以判断 172.16.165.165 为终端,其他两个为网络设备。再排查一下 172.16.165.254

    image-20211228113116131

    可以看到 172.16.165.254 为 dhcp 服务器。

    故可以确定 受陷主机为 172.16.165.165

    What is the host name of the Windows VM that gets infected?

    image-20211228113835280

    What is the MAC address of the infected VM?

    image-20211228114010402

    What is the IP address of the compromised web site?

    将该页面的响应导出后,直接报毒。所以就是 该网站被攻陷

    image-20211228145435140

    What is the domain name of the compromised web site?

    image-20211228145600526

    What is the IP address and domain name that delivered the exploit kit and malware?

    继续翻看请求记录,发现请求了一个 jar 包。

    image-20211228142843897

    下载下来后发现报毒。

    image-20211228143313282

    所以就是通过 该网站来投递攻击载荷。

    image-20211228150241540

    另一个方法就是把所有的 http 对象导出,然后用杀毒软件扫一下整个导出目录。。。

    image-20211228151126594

    通过 referer 头部定位到引用恶意域名的网站

    image-20211228140458031

    LEVEL 2 QUESTIONS:

    What is the redirect URL that points to the exploit kit (EK) landing page?

    第一个请求 stand. 这个域名的http header referer 字段

    image-20211228151759856

    Besided the landing page (which contains the CVE-2013-2551 IE exploit), what other exploit(s) sent by the EK?

    image-20211228153005547

    java 和 flash

    How many times was the payload delivered?

    3 次,按照顺序,分别是

    image-20211228154046477

    Submit the pcap to VirusTotal and find out what snort alerts triggered. What are the EK names are shown in the Suricata alerts?

    将流量包提交到 virustotal,观察输出即可

    image-20211228154535950

    LEVEL 3 QUESTIONS:

    Checking my website, what have I (and others) been calling this exploit kit?

    这个我不会,,看答案是 RIG EK

    What file or page from the compromised website has the malicious script with the URL for the redirect?

    http://www.ciniholland.nl/ 该url 的响应包

    image-20211228155648815

    这也发现 wireshark 的一处问题,没有多个数据包data部分搜索功能。

    其实可以将整个导出对象的文件夹添加到 vscode 中,再使用全局搜索功能

    image-20211228161817625

    Extract the exploit file(s). What is(are) the md5 file hash(es)?

    image-20211228161141110

    VirusTotal doesn't show all the VRT rules under the "Snort alerts" section for the pcap analysis. If you run your own version of Snort with the VRT ruleset as a registered user (or a subscriber), what VRT rules fire?

    没尝试。。

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  • 原文地址:https://www.cnblogs.com/starrys/p/15812523.html
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