ET INFO Observed RMM Domain in TLS SNI ( * .action1-com .b-cdn .net)
Sourceet/open
CreatedAugust 1, 2025
UpdatedAugust 1, 2025
Classificationmisc-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed RMM Domain in TLS SNI ( * .action1-com .b-cdn .net)"; flow:established,to_server; tls.sni; dotprefix; content:".action1-com.b-cdn.net"; endswith; fast_pattern; reference:url,attack.mitre.org/techniques/T1219/; reference:url,action1.com/documentation/firewall-configuration/; classtype:misc-activity; sid:2063876; rev:1; metadata:created_at 2025_08_01, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_01;)
Metadata
created at2025_08_01
performance impactLow
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2025_08_01
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