ET MALWARE APT33/CharmingKitten JS/HTA Stage 1 CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?anti=";
content:"&cliname="; distance:0; fast_pattern;
http.accept;
content:"*/*"; endswith;
http.accept_enc;
content:"gzip, deflate"; endswith;
http.header_names;
content:"User-Agent";
content:!"Cache";
content:!"Referer";
Raw source ET MALWARE APT33/CharmingKitten JS/HTA Stage 1 CnC Checkin · 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 APT33/CharmingKitten JS/HTA Stage 1 CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?anti=";
    content:"&cliname="; distance:0; fast_pattern;
    http.accept;
    content:"*/*"; endswith;
    http.accept_enc;
    content:"gzip, deflate"; endswith;
    http.header_names;
    content:"User-Agent";
    content:!"Cache";
    content:!"Referer";
    reference:md5,e15b3d2c39888fe459dc2d9c8dec331d;
    classtype:targeted-activity;
    sid:2026575; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag APT33, tag CharmingKitten, updated_at 2020_09_16;
)

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