Threat Description

URL obfuscation has long been a tactic of cybercriminals in their attempt to trick their potential victims. Yet again, another obfuscation technique has been observed by Team CTM360 to be on the rise – domain names being registered starting with “com-“, due to the ease of setting up a subdomain. An example of this would be “”, where the domain name is in fact “”. Normally, such websites imitate the design of a legitimate URL and alter it by adding special characters and/or misspelled words making it closely resemble the original website. Preliminary analysis has revealed that approximately 68,000 domains have been registered matching this pattern. Domains beginning with ‘com-‘ were mostly found to be either phishing websites, fake news websites, or were being used to send out spoofed emails.


Recommended Preventative Measures

  • Quarantine emails from domains that begin with ‘com-‘ in your email gateway
  • Define firewall rules to detect and block access to websites that have domain names beginning with ‘com-‘