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Hackers use Slack to hide malware communications

A group of hackers is using a previously undocumented backdoor program designed to interact with attackers over Slack. While abusing legitimate services for malware command-and-control purposes is not a new development, this is the first time researchers have seen Slack, a popular enterprise collaboration tool, being used in this way.

The backdoor was detected by security firm Trend Micro in a targeted attack launched from the compromised website of an organization called the Korean American National Coordinating Council that posts articles related to North and South Korean politics. The technique of infecting websites that are of interest to a particular group of individuals or organizations is known as a "watering hole" attack.

It's not clear if victims were directed to the website via an email campaign or if attackers just waited for regular visitors, but the site was modified to host an exploit for a remote code execution vulnerability in the Windows VBScript engine. That vulnerability is tracked as CVE-2018-8174 and can be exploited through Internet Explorer. However, the flaw was patched by Microsoft in May 2018, so having an up-to-date operating system would have prevented the attack.

https://www.itworld.com/article/3359182/hackers-use-slack-to-hide-malware-communications.html

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