ET MALWARE Observed RMM Payload Delivery Domain (mail-srv .com in TLS SNI)
Sourceet/open
CreatedMarch 24, 2026
UpdatedMarch 24, 2026
Classificationtrojan-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed RMM Payload Delivery Domain (mail-srv .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".mail-srv.com"; endswith; fast_pattern; classtype:trojan-activity; sid:2068407; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_24, deployment Perimeter, confidence High, signature_severity Major, tag RMM, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_24;)
Metadata
attack targetClient_Endpoint
created at2026_03_24
deploymentPerimeter
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2026_03_24
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