ET MALWARE JS SpyPress C2 Beacon

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /?cl="; startswith;
pcre:"/^[A-Za-z0-9\x25\x2b\x2f\x3b]+\x20/R";
target:src_ip;
Raw source ET MALWARE JS SpyPress C2 Beacon · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http [$HOME_NET,$SMTP_SERVERS] any -> any any (
    msg:"ET MALWARE JS SpyPress C2 Beacon";
    flow:established,to_server;
    http.request_line;
    content:"GET /?cl="; startswith;
    pcre:"/^[A-Za-z0-9\x25\x2b\x2f\x3b]+\x20/R";
    reference:url,www.proofpoint.com/us/blog/threat-insight/ta458-roundpress-exploits;
    classtype:trojan-activity;
    sid:2071250; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2026_07_21, deployment Perimeter, malware_family SpyPress, confidence High, signature_severity Major, tag c2, updated_at 2026_07_21, 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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