ET MALWARE Observed Earth Kasha Domain (srmbr .com) in TLS SNI

Query · suricata

flow:established,to_server;
tls.sni; dotprefix;
content:".srmbr.com"; endswith; fast_pattern;
Raw source ET MALWARE Observed Earth Kasha Domain (srmbr .com) in TLS SNI · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Observed Earth Kasha Domain (srmbr .com) in TLS SNI";
    flow:established,to_server;
    tls.sni; dotprefix;
    content:".srmbr.com"; endswith; fast_pattern;
    reference:url,www.trendmicro.com/en_us/research/24/k/lodeinfo-campaign-of-earth-kasha.html;
    classtype:domain-c2;
    sid:2058032; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_12_02, deployment Perimeter, malware_family Cobalt_Strike, malware_family LODEINFO, malware_family NOOPDOOR, performance_impact Low, confidence High, signature_severity Major, tag Earth_Kasha, updated_at 2024_12_02, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1048, mitre_technique_name Exfil_Over_Alternative_Protocol;
)

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