OT Cybersecurity Best Practices for SMBs: Communication Channels to Use During Cyber Incident Response
Summary: A Dragos OT-CERT blog post advises small and medium businesses to prepare alternate communication channels in advance, because a ransomware attack or physical incident could render email and chat unusable, or an adversary could listen in after breaching the environment. It recommends free out-of-band options that can be set up in less than a day: Proton Mail for encrypted email, Zoom's end-to-end encryption for free tier users, Signal for group calling up to 40 members and for SMS and voice, Google Duo for video conferencing up to 12 participants, plus 4G routers, Wi-Fi hotspots, satellite phones and two-way radios where coverage allows.
What's compelling: The post notes your email may have been the initial vector for the larger network compromise, so the channel you would normally use to coordinate the response is the one an attacker may already control. For an under-resourced SMB, the gap between needing out-of-band communications and having them ready is measured in hours you may not have.
Read the original at Dragos Blog ↗
- Topics
- OT / ICS & Critical Infrastructure
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