Godaddy.com, the world’s largest domain name registrar, recently addressed an authentication weakness that cybercriminals were using to blast out spam through legitimate, dormant domains. But several more recent malware spam campaigns suggest GoDaddy’s fix hasn’t gone far enough, and that scammers likely still have a sizable arsenal of hijacked GoDaddy domains at their disposal.
On January 22, KrebsOnSecurity published research showing that crooks behind a series of massive sextortion and bomb threat spam campaigns throughout 2018 — an adversary that’s been dubbed “Spammy Bear” — achieved an unusual amount of inbox delivery by exploiting a weakness at GoDaddy which allowed anyone to add a domain to their GoDaddy account without validating that they actually owned the domain.
Spammy Bear targeted dormant but otherwise legitimate domains that had one thing in common: They all at one time used GoDaddy’s hosted Domain Name System (DNS) service. Researcher Ron Guilmette discovered that Spammy Bear was able to hijack thousands of these dormant domains for spam simply by registering free accounts at GoDaddy and telling the company’s automated DNS service to allow the sending of email with those domains from an Internet address controlled by the spammers.
Very soon after that story ran, GoDaddy said it had put in place a fix for the problem, and had scrubbed more than 4,000 domain names used in the spam campaigns that were identified in my Jan. 22 story. But on or around February 1, a new spam campaign that leveraged similarly hijacked domains at GoDaddy began distributing Gand Crab, a potent strain of ransomware.
As noted in a post last week at the blog MyOnlineSecurity, the Gand Crab campaign used a variety of lures, including fake DHL shipping notices and phony AT&T e-fax alerts. The domains documented by MyOnlineSecurity all had their DNS records altered …