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    Home Cybersecurity
    • Cybersecurity

    Macro Malware, Aging Worms Continue to Pose Threat to Present Day

    By
    Robert Lemos
    -
    April 1, 2017
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      Old Malware Threats

      Macro malware and worms, which were prominent in the 1990s, remain significant security threats to the present day and event top some top security threat lists.

      While attackers are increasingly turning to new techniques, such as ransomware and denial-of-service attacks fueled by the Internet of Things, older types of malware have persisted and are even making a comeback, according two reports released by network-security firms.

      Macro malware, which uses the scripting language in Microsoft Office to infect and attack applications, accounts for three of the Top-10 malicious programs detected by network-security firm WatchGuard in Q4 2016. Other oldie-but-goodies that made it into the company’s top threat list include two malicious JavaScript programs—at No. 3 and No. 4—and a PHP backdoor at No. 5.

      Because of a variety of obfuscation techniques and because defenders are often lax about looking for older threats, a lot of the viruses and malware coming out is not detected by the current versions of antivirus applications on the first day or few weeks, Corey Nachreiner, chief technology officer at WatchGuard, told eWEEK.

      “It is really easy for the bad guys to make old malware look new again,” he said. “We are seeing plenty of old techniques being used in new malware, such as macro malware.”

      Older techniques and malware have a habit of resurfacing occasionally. Reusing system utilities—the original version of computer hacking—is a tactic increasingly utilized by attackers attempting to maintain a low profile on compromised systems.

      Worms and viruses with a network propagation mechanism have also occasionally reappeared. The Conficker virus has occasionally popped up. A year ago, for example, security firm Check Point Software Technologies revealed that Conficker made up 20 percent of the attacks recognized by its systems.

      Microsoft SQL Slammer topped the threats seen by network-security firm Fortinet in Q4 2016. The company saw a surge in Slammer detections and SQL injection attacks in mid-to-late December. Much of the attacks came from universities in the U.S., which may have been attackers searching for legacy and vulnerable servers, according to Fortinet.

      “They are still probing for old vulnerabilities and much of that is likely due to them being loaded into automated tools,” Derek Manky, global

      security strategist for Fortinet, told eWEEK. “The effect, of course, is the same; you can’t assume vulnerabilities get so old that they fall off the attacker radar.”

      Not all companies are seeing the uptick in Slammer attacks. WatchGuard saw no similar increase, the company’s Nachreiner said.

      “We did not see it in our top-10 or the top-100,” he said.

      The company did find that 30 percent of malware escaped detection by standard antivirus software. Calling this “zero-day malware,” the company said it showed that the use of obfuscation by attackers made known malware able to escape detection.

      Robert Lemos
      Robert Lemos is an award-winning freelance journalist who has covered information security, cybercrime and technology's impact on society for almost two decades. A former research engineer, he's written for Ars Technica, CNET, eWEEK, MIT Technology Review, Threatpost and ZDNet. He won the prestigious Sigma Delta Chi award from the Society of Professional Journalists in 2003 for his coverage of the Blaster worm and its impact, and the SANS Institute's Top Cybersecurity Journalists in 2010 and 2014.
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