Firewall Vendor Warns Attackers Using Valid Credentials They Previously Stole. Attackers wielding an emerging strain of ransomware called Helldown have been gaining a foothold in victims’ networks by exploiting a previously unknown flaw in their Zyxel firewalls, security researchers warn. Zyxel has warned attackers may be using valid credentials they previously stole.
First seen on govinfosecurity.com
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