ET MALWARE AMOS CnC Exfiltration - /joinsystem (POST)

Query · suricata

flow:established,to_server;
urilen:11;
http.method;
content:"POST";
http.uri;
content:"/joinsystem"; fast_pattern;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|"; nocase;
http.request_body;
content:"BuildID="; startswith;
content:"&user="; distance:0;
Raw source ET MALWARE AMOS CnC Exfiltration - /joinsystem (POST) · 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 AMOS CnC Exfiltration - /joinsystem (POST)";
    flow:established,to_server;
    urilen:11;
    http.method;
    content:"POST";
    http.uri;
    content:"/joinsystem"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|"; nocase;
    http.request_body;
    content:"BuildID="; startswith;
    content:"&user="; distance:0;
    reference:url,go.recordedfuture.com/hubfs/reports/cta-2024-0514.pdf;
    classtype:trojan-activity;
    sid:2052602; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_05_14, deployment Perimeter, malware_family AMOSStealer, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_14;
)

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