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Over 9,000 Asus Routers Compromised in ViciousTrap Hack

GreyNoise warns that infected routers remain invisible to standard defenses even after restarts or firmware updates.

Overview

  • Hackers have seized control of more than 9,000 Asus Wi-Fi routers, adding them to a growing botnet.
  • GreyNoise’s AI tool sift first detected suspicious router activity in March, leading analysts to uncover the ViciousTrap campaign.
  • Attackers exploited a CVE-2023-39780 command injection flaw through brute-force login attempts and authentication bypasses to maintain persistent access.
  • Asus issued a firmware update on May 27 that patches the exploited vulnerability but does not remove existing infections.
  • Cybersecurity experts advise users to perform factory resets before applying the patch to eliminate stealthy backdoors.