Attackers using a newly discovered backdoor program, called “Baccamun,” are spreading the malware via an ActiveX exploit, researchers revealed.
The remote code execution flaw (CVE-2012-0158) used for exploitation has been noted by other researchers as being a bug of choice in hacker arsenals. Last month, Trend Micro named the Microsoft vulnerability the most commonly exploited flaw related to targeted attacks in the last half of 2013, despite the fact that a patch had been issued more than two years ago.
In a Friday blog post, Symantec said that hackers recently targeted a Korean organization with Baccamun by exploiting CVE-2012-0158. In one attack, the group (believed to be operating in East Asia) disguised a malicious document as an invite for a free car inspection to employees.
The RTF document instead installed Baccamun, which is capable of terminating users' processes, downloading files and executing arbitrary commands, Symantec said.