CISA and NCSC Release Directives to Address Multiple Cisco Platforms Exploited by Threat Actors

Context CISA has released Emergency Directive 25-03 in response to an advanced threat actor actively exploiting zero-day vulnerabilities in Cisco Adaptive Security Appliances (ASA) devices. This alert comes as the United Kingdom National Cyber Security Centre releases a parallel advisory warning of active exploitation. This persistent threat utilizes new malware strains, RayInitiator and LINE VIPER, to maintain control and…

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Hunting Malware That Hides: 5 Case Studies with 7 Downloadable YARA Rules

Security teams don’t just need alerts, they need answers. At Stairwell, we’ve seen how easily malware evades detection when defenders rely solely on behavior, logs, or static IOCs. Some threats hide inside image files. Others remain dormant for months. Many are missed not because they’re advanced, but because no one was looking in the right…

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