ET HUNTING Dotted Quad Host Base64-Encoded PHP payload

Query · suricata

flow:established,to_client;
flowbits:isset,http.dottedquadhost;
http.stat_code;
content:"200";
http.response_body;
content:"|3c 3f|";
content:"eval|28|"; nocase;
content:" base64_decode|28|"; distance:0; nocase; fast_pattern;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET HUNTING Dotted Quad Host Base64-Encoded PHP payload · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Dotted Quad Host Base64-Encoded PHP payload";
    flow:established,to_client;
    flowbits:isset,http.dottedquadhost;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"|3c 3f|";
    content:"eval|28|"; nocase;
    content:" base64_decode|28|"; distance:0; nocase; fast_pattern;
    reference:url,blog.sucuri.net/2023/04/massive-abuse-of-abandoned-evalphp-wordpress-plugin.html;
    classtype:trojan-activity;
    sid:2063008; rev:1;
    metadata:affected_product PHP, attack_target Client_and_Server, tls_state plaintext, created_at 2025_06_16, deployment Perimeter, confidence Medium, signature_severity Major, tag PHP, updated_at 2025_06_16, mitre_tactic_id TA0002, mitre_tactic_name Execution, mitre_technique_id T1059, mitre_technique_name Command_And_Scripting_Interpreter;
    target:dest_ip;
)

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