ET MALWARE TA471/UNC2589 Related Activity (GET)

Query · suricata

flow:established,to_server;
urilen:2;
http.method;
content:"GET";
http.uri;
pcre:"/^\/[a-z]$/";
http.user_agent;
content:"-hobot-"; bsize:7; fast_pattern;
http.accept_enc;
content:"gzip"; bsize:4;
http.header_names;
content:!"Referer";
Raw source ET MALWARE TA471/UNC2589 Related Activity (GET) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE TA471/UNC2589 Related Activity (GET)";
    flow:established,to_server;
    urilen:2;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\/[a-z]$/";
    http.user_agent;
    content:"-hobot-"; bsize:7; fast_pattern;
    http.accept_enc;
    content:"gzip"; bsize:4;
    http.header_names;
    content:!"Referer";
    reference:md5,1b161170a6b025b3f44746e20afd130f;
    reference:url,www.sentinelone.com/blog/threat-actor-uac-0056-targeting-ukraine-with-fake-translation-software/;
    classtype:trojan-activity;
    sid:2035531; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_03_18, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_18;
)

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