ET MALWARE MacOS/UpdateAgent.A CnC Activity M1

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/wrte?maid="; startswith; fast_pattern;
pcre:"/^\/wrte\?maid=[A-Z0-9]{8}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{12}$/U";
http.user_agent;
content:"curl"; startswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE MacOS/UpdateAgent.A CnC Activity M1 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE MacOS/UpdateAgent.A CnC Activity M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/wrte?maid="; startswith; fast_pattern;
    pcre:"/^\/wrte\?maid=[A-Z0-9]{8}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{4}\-[A-Z0-9]{12}$/U";
    http.user_agent;
    content:"curl"; startswith;
    http.header_names;
    content:!"Referer";
    reference:md5,5dc4e1b8610aacc5941ccf68f823f366;
    reference:url,microsoft.com/security/blog/2022/02/02/the-evolution-of-a-mac-trojan-updateagents-progression;
    classtype:trojan-activity;
    sid:2035085; rev:2;
    metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2022_02_03, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_03, reviewed_at 2024_06_26;
)

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