ET MALWARE AstarionRAT CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri; bsize:40;
content:"/intake/organizations/events|3f|channel|3d|app"; fast_pattern;
http.user_agent;
content:"Edge/18.19045";
http.cookie;
content:"AFUAK|3d|1C5DEC09609A6B41|3b|"; startswith;
content:"BLA|3d|"; within:10;
content:"HFK=423b5828bc98f5c7c57e6c321"; distance:0; endswith;
target:src_ip;
Raw source ET MALWARE AstarionRAT CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE AstarionRAT CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri; bsize:40;
    content:"/intake/organizations/events|3f|channel|3d|app"; fast_pattern;
    http.user_agent;
    content:"Edge/18.19045";
    http.cookie;
    content:"AFUAK|3d|1C5DEC09609A6B41|3b|"; startswith;
    content:"BLA|3d|"; within:10;
    content:"HFK=423b5828bc98f5c7c57e6c321"; distance:0; endswith;
    reference:url,www.huntress.com/blog/clickfix-matanbuchus-astarionrat-analysis;
    classtype:trojan-activity;
    sid:2067734; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_17, deployment Perimeter, malware_family AstarionRAT, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2026_02_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)

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