ET MALWARE Observed TA402 Domain (iwsmailserver .com in TLS SNI)
Sourceet/open
CreatedMarch 13, 2026
UpdatedMarch 13, 2026
Classificationtrojan-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed TA402 Domain (iwsmailserver .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".iwsmailserver.com"; endswith; fast_pattern; reference:url,www.proofpoint.com/us/blog/threat-insight/iran-conflict-drives-heightened-espionage-activity-against-middle-east-targets; classtype:trojan-activity; sid:2068212; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_03_13, deployment Perimeter, confidence High, signature_severity Major, tag TA402, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_13;)
Metadata
attack targetClient_Endpoint
created at2026_03_13
deploymentPerimeter
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2026_03_13
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