ET MALWARE AlphaCrypt Connectivity Check 1

Query · suricata

flow:established,to_server;
urilen:4;
http.uri;
content:"/raw"; fast_pattern;
http.user_agent;
content:"Mozilla/5.0 (Windows NT 6.1|3b 20|rv|3a|31.0) Gecko/20100101 Firefox/31.0"; endswith;
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
Raw source ET MALWARE AlphaCrypt Connectivity Check 1 · Suricata
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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 AlphaCrypt Connectivity Check 1";
    flow:established,to_server;
    urilen:4;
    http.uri;
    content:"/raw"; fast_pattern;
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.1|3b 20|rv|3a|31.0) Gecko/20100101 Firefox/31.0"; endswith;
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
    reference:md5,d0e3471f4963496cefd73744e98340aa;
    classtype:trojan-activity;
    sid:2021775; rev:4;
    metadata:created_at 2015_09_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_05;
)

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