ET MALWARE JS/TrojanDownloader.Agent.TXV CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/postUP.php"; endswith; fast_pattern;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0)";
http.connection;
content:"keep-alive";
http.content_type;
content:"application/x-www-form-urlencoded"; startswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE JS/TrojanDownloader.Agent.TXV CnC Activity · 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 JS/TrojanDownloader.Agent.TXV CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/postUP.php"; endswith; fast_pattern;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0)";
    http.connection;
    content:"keep-alive";
    http.content_type;
    content:"application/x-www-form-urlencoded"; startswith;
    http.header_names;
    content:!"Referer";
    reference:url,twitter.com/Unit42_Intel/status/1496172957726560257;
    classtype:trojan-activity;
    sid:2035271; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_22, deployment Perimeter, malware_family JS_TrojanDownloader_Agent_TXV, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_22, reviewed_at 2024_06_26;
)

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