ET MALWARE [ANY.RUN] MetaStealer v.5 CnC Activity (MC-NMF TLS SNI)

Query · suricata

flow:established,to_server, only_stream;
content:"|00 01 00 01 02 02 1F|net.tcp://"; startswith;
content:"|03 08 09 13|application/ssl-tls"; distance:0;
content:"|00 07 00 00 04 3f|124|00 0a|"; distance:0; within:200; fast_pattern;
Raw source ET MALWARE [ANY.RUN] MetaStealer v.5 CnC Activity (MC-NMF 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 tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE [ANY.RUN] MetaStealer v.5 CnC Activity (MC-NMF TLS SNI)";
    flow:established,to_server, only_stream;
    content:"|00 01 00 01 02 02 1F|net.tcp://"; startswith;
    content:"|03 08 09 13|application/ssl-tls"; distance:0;
    content:"|00 07 00 00 04 3f|124|00 0a|"; distance:0; within:200; fast_pattern;
    reference:url,community.emergingthreats.net/t/metastealer-v-5-tls/1800;
    classtype:trojan-activity;
    sid:2054404; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_07_08, deployment Perimeter, malware_family MetaStealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_09, reviewed_at 2025_04_21;
)

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