IIS, Drupal, and Oracle WebLogic web technologies experienced increased attacks in Q2 2018. According to a new threat report from eSentire, IIS attacks showed a massive increase, from 2,000 to 1.7 million, since last quarter.
Analysis of the attacks revealed that both IIS and WebLogic exploits maintained a consistent number of attacks (about 200) per IP across organizations, with those attacks originating from servers hosting Apache, RDP, SQL, IIS, and HTTP API services.
Most sources targeting IIS web servers originated from China-based IP addresses. According to Shodan, there are 3.5 million IIS web servers exposed (with 1 million in China). The compromised servers largely originated from Tencent and Alibaba.
Researchers also noted an interesting collection of operating systems among the attacking infrastructure involved – over 400 of the attacking IPs had Shodan records indicating they were Windows machines (including XP, 7, 8, 2008, and 2012). Additionally, nearly 350 FTP servers and over 100 mail servers were reported; there were also VPN servers, MikroTik devices (reported as bandwidth-testing servers), Kangle, Squid, Jetty, and a handful of lesser-known web service technologies.
“IIS is a popular web server, with prevalence in the U.S. and China. Organizations using web servers need to make sure they monitor for these vulnerabilities and update or patch as necessary. Oracle WebLogic is another webserver that saw a lot of attacks and we’ve seen Apache attacks reported too,” said Kerry Bailey, CEO, eSentire. “Web servers are exposed de facto, which makes them a primary target, and we saw continued attacks against IIS continue in Q3 2018. IIS patches for earlier versions, like 6.0, are available. Otherwise, users should consider updating to more recent versions of the web server.”
Additional Q2 2018 report findings:
- Top five most affected industries: biotechnology, accounting, real estate, marketing, and construction.
- The most common execution tactic technique observed around endpoint solutions was the use of PowerShell (32%), followed by VBA scripting (21%). Of the PowerShell-based attacks observed, 83% used obfuscated command lines intended to hide their intentions.
- Emotet was the most frequently observed malware due to numerous version updates and feature additions since it was first reported in 2014.
- The use of obfuscated PowerShell commands increased 50% from last quarter, partly due to contributions by Emotet.
- Four observed exploit campaigns stood out targeting IIS, Drupal, WebLogic servers, and GPON routers. GPON home routers were attacked after the PoC code release (eSentire saw 5K detections total, with volume peaking on May 12). eSentire continues to see home router exploits through Q3.