ET MALWARE Win32/IceXLoader Sending Initial Checkin (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
pcre:"/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/";
http.request_body;
content:"SetOn="; startswith; bsize:8; fast_pattern;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/IceXLoader Sending Initial Checkin (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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/IceXLoader Sending Initial Checkin (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    pcre:"/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/";
    http.request_body;
    content:"SetOn="; startswith; bsize:8; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:url,www.fortinet.com/blog/threat-research/new-icexloader-3-0-developers-warm-up-to-nim;
    reference:md5,54fb25c20d4191ff7e5185812485282f;
    classtype:command-and-control;
    sid:2037043; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_06_21, deployment Perimeter, malware_family IceXLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_21;
)

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