ET MALWARE ModPipe CnC Activity (POST)

Query · suricata

flow:established,to_server;
http.start;
content:"POST /robots.txt HTTP/1."; fast_pattern;
http.user_agent;
content:"Mozilla/4.0|20|(compatible|3b 20|MSIE 8.0|3b 20|Windows|20|NT|20|6.1|3b 20|Trident/4.0)"; depth:63;
isdataat:!1,relative;
http.header_names;
content:"Accept|0d 0a|Content-Length|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|";
Raw source ET MALWARE ModPipe CnC Activity (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 ModPipe CnC Activity (POST)";
    flow:established,to_server;
    http.start;
    content:"POST /robots.txt HTTP/1."; fast_pattern;
    http.user_agent;
    content:"Mozilla/4.0|20|(compatible|3b 20|MSIE 8.0|3b 20|Windows|20|NT|20|6.1|3b 20|Trident/4.0)"; depth:63;
    isdataat:!1,relative;
    http.header_names;
    content:"Accept|0d 0a|Content-Length|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|";
    reference:url,www.welivesecurity.com/2020/11/12/hungry-data-modpipe-backdoor-hits-pos-software-hospitality-sector/;
    classtype:command-and-control;
    sid:2031208; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_11_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_16;
)

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