ET MALWARE AlphaCrypt CnC Beacon 6

Query · suricata

flow:established,to_server;
urilen:>250;
http.method;
content:"GET";
http.uri;
content:".php?";
pcre:"/\/[a-z]+\.php\?[A-F0-9]{250,}$/";
http.user_agent;
content:"Mozilla/5.0 (Windows NT 6.3|3b 20|WOW64|3b 20|Trident/7.0|3b 20|Touch|3b 20|rv|3a|11.0) like Gecko"; fast_pattern;
http.header_names;
content:!"Accept";
content:!"Referer";
Raw source ET MALWARE AlphaCrypt CnC Beacon 6 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE AlphaCrypt CnC Beacon 6";
    flow:established,to_server;
    urilen:>250;
    http.method;
    content:"GET";
    http.uri;
    content:".php?";
    pcre:"/\/[a-z]+\.php\?[A-F0-9]{250,}$/";
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.3|3b 20|WOW64|3b 20|Trident/7.0|3b 20|Touch|3b 20|rv|3a|11.0) like Gecko"; fast_pattern;
    http.header_names;
    content:!"Accept";
    content:!"Referer";
    reference:md5,66bbfc1e5b027eb48c76078129194015;
    classtype:command-and-control;
    sid:2022300; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_12_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_08_18, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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